After a support structure (12) has been circumferentially positioned around an annular component (11) of a tyre (2), gripping elements (16) carried by the support structure (12) and circumferentially distributed around a central axis (X) are radially approached to the annular component (11) bringing into contact therewith a plurality of feeler pins (22), slidably carried by each of said gripping elements (16). Once contact is made, the radially approaching of the gripping elements (16) to the annular component (11) continues by sliding the gripping elements themselves along the feeler pins (22). All the feeler pins (22) can therefore come into contact with the annular component (11), copying the shape of the outer surface. The feeler pins (22) are then locked with respect to the gripping elements (16) in order to allow the removal of a support drum (10) from the annular component (11) and support the latter in the absence of normal stresses.
A tyre (1) is built on a toroidal support (8) and subsequently closed in a moulding cavity (14) defining a moulding surface (14a) directed towards the tyre (1). The tyre (1) is expanded from a building condition wherein it has an internal surface (1a) adherent against the toroidal support (8) to a pressing condition, wherein the tyre (1) is vulcanised with an external surface (1b) thereof pressed against the moulding surface (14a) due to an expansion imparted to the tyre (1). In the pressing condition, the expansion imparted in the shoulder zones (Sz) of the tyre is smaller than the expansion imparted in each of the sidewall zones (Fz) and crown zone (Cz).
This invention relates to: a cross-linkable elastomeric composition comprising an unsaturated heterocyclic compound; a process for preparing an elastomeric compound; a tire component comprising the aforementioned elastomeric compound; and a tire for vehicle wheels comprising at least the aforementioned tire component.
An “all season” tyre (1) for cars and/or light transport vehicles is described, having a tread band (8) provided with a plurality of longitudinal channels and a plurality of grooves (6, 7, 11,12, 13) and sipes (21, 22, 23, 24, 25) having a substantially transverse course, regularly arranged in the central ribs formed by the longitudinal channels and in the shoulder regions (L2, L3) over the whole tread band (8). The tread band (8) also has transverse notches resulting from joining a groove and a sipe having a transverse course, arranged consecutively to each other, and seamlessly extending substantially over the whole portion of the tyre containing them, i.e., the shoulder regions (L 2, L 3) or some of the central ribs (9, 10).
A method and system for checking a process for building a tyre including sequential deposition of an ordered plurality of N semi-finished elements on a drum. The method includes: establishing an ordered plurality of N classes of drum states, wherein a first class corresponds to a bare drum state and an i-th class corresponds to a drum state including the i-1th semi-finished element deposited in radially outermost position; before the deposition of the i-th semi-finished element: processing an acquired image of a drum state to associate to the current drum state a current class among the ordered plurality of N classes of drum states; authorising the deposition of the i-th semi-finished element based on a comparison between the current class and the expected class.
The present invention relates to tyre elastomeric compositions and compounds, to tyres for vehicle wheels comprising them which are particularly performant and advantageous for summer use. The tyres of the invention, comprising such compounds especially in the tread band, are characterized by reduced wear and rolling resistance and high grip, both under wet and dry conditions. These advantageous features are obtained by combining certain conjugated diene polymers with a plasticizing admixture with a predetermined content of resins and oils.
C08L 53/02 - Compositions contenant des copolymères séquencés possédant au moins une séquence d'un polymère obtenu par des réactions ne faisant intervenir que des liaisons non saturées carbone-carboneCompositions contenant des dérivés de tels polymères contenant des monomères vinylaromatiques et des diènes conjugués
B60C 1/00 - Pneumatiques caractérisés par la composition chimique, la disposition ou le mélange physique de la composition
A tyre (100) for racing bicycle wheels comprises a carcass structure (2) and a tread band (6) arranged in a radially outer position with respect to the carcass structure (2); wherein the carcass structure (2) comprises a single carcass ply (3) turned around annular anchoring structures (4a, 4b) and wherein free edges (11) of the carcass ply (3) are radially juxtaposed over one another. A protective layer (16) has a width equal to or less than 50% of the width of the tyre (100). A first sidewall reinforcing ply (14) and a second sidewall reinforcing ply (15) are axially arranged between a respective annular anchoring structure (4a, 4b) and an equatorial plane (X) of the tyre. In a first area of juxtaposition (17), the protective layer (16), the first sidewall reinforcing ply (14) and the portion of juxtaposition (12) of edges of carcass ply are radially juxtaposed according to a predetermined order. In a second area of juxtaposition (18), the protective layer (16), the second sidewall reinforcing ply (15) and the portion of juxtaposition (12) of edges of carcass ply are radially juxtaposed according to a predetermined order. The first area of juxtaposition (17) and the second area of juxtaposition (18) are arranged at respective distances from the equatorial plane (X) comprised between 3% and 24% of the width of the tyre (100).
B60C 9/09 - Carcasses les fils de renforcement de chaque pli de la carcasse étant sensiblement parallèles joignant transversalement un talon à l'autre, c.-à-d. formant une nappe radiale combinés avec d'autres nappes comportant des fils s'étendant en diagonale d'un talon à l'autre, c.-à-d. formant une combinaison de nappes radiales et de nappes en biais
The present invention relates to a tyre (2) for vehicle wheels comprising a pattern (30) in at least a portion of a surface thereof, said pattern (30) comprising a first set of sinusoidal lines (31) equal to each other that extend along a first direction (X). The lines of the first set of lines (31) follow each other along a direction perpendicular to the first direction (X) without any other sinusoidal lines extending along the first direction (X) other than the sinusoidal lines of said first set being present between two consecutive sinusoidal lines of said first set. The pattern (30) also comprises a second set of sinusoidal lines (32) equal to the first set of sinusoidal lines (31) apart from the fact that the sinusoidal lines (32) of said second set extend along a second direction (Y) inclined with respect to the first direction (X) so that the lines of the first set of lines (31) intersect with the lines of the second set of lines (32).
The present invention relates to a tyre (2) for vehicle wheels comprising a pattern (30) in at least a portion of a surface thereof, said pattern (30) comprising a first set of sinusoidal lines (31) that extend along a first direction (X). The lines of the first set of lines (31) are consecutive to each other along a direction perpendicular to the first direction (X) and all have a same amplitude a of base value A which is constant along the first direction (X) except at predefined points spaced apart from each other by a predetermined fixed step K along the first direction where the amplitude a of each line deviates randomly from the base value A taking values comprised between A - 5 and A + 5, where 8 is a predetermined amount of deviation greater than 0. The pattern (30) also comprises a second set of lines (32) equal to the lines of the first set of lines (31) apart from the fact that they extend along a second direction (Y) inclined with respect to the first direction (X) so that the lines of the first set of lines (31) intersect with the lines of the second set of lines (32).
A tyre includes a tread band, a tread surface which is radially external to the tread band, and a plurality of blocks formed on the tread band. Each block is at least partially delimited by a groove which defines a flank of the block. The flank is joined to a tread surface portion. The tread surface portion is defined on the block in the region of an edge of the block. There are, on a portion of the edge, a plurality of consecutive recesses and, in the region of at least two of these recesses, there is a respective block portion which defines a protrusion. The protrusion projects from the flank of the block towards the inner side of the groove and extends as far as a bottom of the groove.
UNIVERSITA' DEGLI STUDI DI MILANO - BICOCCA (Italie)
Inventeur(s)
Tadiello, Luciano
Giannini, Luca
Zoia, Luca
Carnevale, Mattia
Abrégé
The present invention relates to a tyre for vehicle wheels which comprises at least one structural element comprising a vulcanised elastomeric compound obtained by vulcanisation of a vulcanisable elastomeric composition comprising per 100 phr of diene elastomeric polymer: (i) a predispersion of a diene elastomeric polymer and epihalohydrin-functionalised lignin, in an amount to provide the elastomeric composition with 100 to 10 phr of diene elastomeric polymer and an amount of epihalohydrin-functionalised lignin equal to or greater than 5 phr, (ii) from 0 to 90 phr of at least one diene elastomeric polymer, (iii) from 0 to 110 phr of a reinforcing filler, (iv) from 0.1 to 12 phr of at least one vulcanising agent.
The present invention relates to a tyre for vehicle wheels which comprises at least one structural element comprising a vulcanised elastomeric compound obtained by vulcanisation of a vulcanisable elastomeric composition comprising per 100 phr of diene elastomeric polymer: (i) a predispersion of a diene elastomeric polymer and nanometric lignin, in an amount to provide the elastomeric composition with 100 to 10 phr of diene elastomeric polymer and an amount of nanometric lignin equal to or greater than 5 phr, (ii) from 0 to 90 phr of at least one diene elastomeric polymer, (iii) from 0 to 110 phr of a reinforcing filler, (iv) from 0.1 to 12 phr of at least one vulcanising agent, where said nanometric lignin comprises lignin particles having an average hydrodynamic diameter D50 lower than 500 nm and greater than 50 nm.
A tyre for vehicle wheels comprises a support structure and a tread band arranged in a radially outer position with respect to the support structure. The support structure comprises at least one reinforcing layer including a plurality of hybrid reinforcing cords (10′) each having a metallic wire (21) twisted together with a multifilament textile yarn (22) comprising a plurality of filaments (23). In any cross section of each of said hybrid reinforcing cords (10′), the metallic wire (21) is at least partially embedded in the filaments (23) of the multifilament textile yarn (22).
12 - Véhicules; appareils de locomotion par terre, par air ou par eau; parties de véhicules
Produits et services
Tires; pneumatic, semi-pneumatic and/or solid tires; wheels
for vehicles; rims; inner tubes and/or other supports to be
inserted between tire and rim, namely mousse for tires.
A tyre (1) for vehicle wheels comprises a first block (60), a second block (70) and a third block (80), which are at least partially delimited laterally by a first main groove (10) and said second main groove (20) and are separated from each other by a first secondary groove (30) and a second secondary groove (40). Each edge (61; 71) of the first block (60), the second block (70) and the third block (80) facing the first secondary groove (30) or the second secondary groove (40) comprises at least a first edge portion (61a, 71a; 77a, 81a), defined by an angular edge, and at least a second edge portion (61b, 71b; 77b, 81b), adjacent to the first edge portion (61a, 71a; 77a, 81a) and defined by a chamfer, connected to each other by at least a first connecting angular edge (63, 73; 78, 83) extending over said tread surface portion. The first edge portion (61a, 71a; 77a, 81a) and the first connecting angular edge (63, 73; 78, 83) define a first angle (A, A'; A1, A1') on the portion of tread surface (3) whose bisector (R, R'; R1, R1') is inclined with respect to a circumferential direction defined on the tread band by an angle of less than 15°.
B60C 11/13 - Sculptures des bandes de roulement caractérisées par la section transversale de la rainure, p. ex. pour étayer les parois, ou pour empêcher le coincement de pierres
B60C 11/12 - Sculptures des bandes de roulement caractérisées par l'utilisation d'entailles étroites ou de traits de scie, p. ex. lamelles
25.
METHOD OF DEPOSITING A CONTINUOUS ELONGATED ELEMENT ONTO A BUILDING DRUM IN A PROCESS FOR BUILDING TYRES FOR VEHICLE WHEELS
A method of depositing a continuous elongated element onto a building drum in a process for building tyres for vehicle wheels, comprises: i) dispensing a continuous elongated element (23) onto a forward branch of a conveyor belt (49) until a head of the continuous elongated element (23) is brought to said building drum (15); ii) stopping the head while continuing to dispense the continuous elongated element (23) and progressively deforming the forward branch into a zigzag shape, lengthening it, to accumulate the continuous elongated element (23) while the head remains still; iii) advancing the head, applying it on the building drum (15) and at least partially winding the continuous elongated element (23) on the building drum (15) by rotating the building drum (15). During winding, the continuous elongated element (23) is dispensed with a dispensing speed (Ve) lower than a peripheral speed (Vp) of the building drum (15) and the deformation of the forward branch is progressively reduced to at least partially compensate for a difference between the dispensing speed (Ve) and the peripheral speed (Vp).
An apparatus for depositing a continuous elongated element onto a building drum in a process for building tyres for vehicle wheels comprises a variable capacity storage device (29) comprising: a plurality of rollers (33, 42), a conveyor belt (49) engaged with said rollers (33, 42), a support structure (30), a carriage (31) mounted on the support structure (30). The plurality of rollers (33, 42) comprises: a first fixed set (41) of rollers and a second fixed set (44) of rollers mounted on the support structure (30), a first movable set (32) of rollers and a second movable set (34) of rollers mounted on the carriage (31). The carriage (31) is movable between a first position, in which a straight line tangent to an upper lateral surface of the rollers (33) of the first movable set (32) lies on one side of a straight line tangent to a lower lateral surface of the rollers (42) of the first fixed set (41) opposite the second movable set (34), and at least one second position, in which both the first movable set (32) and the second movable set (34) are positioned between the first fixed set (41) and the second fixed set (44).
A tyre (1) for vehicles wheels comprises a tread band (2), on which there are defined main pair of grooves (10, 20) between which a first secondary main groove (30), and a first and second block (60, 70) delimited by the pair of main grooves and separated from each other by the first secondary groove (30). Both the edge (61) of the first block (60) and the edge (71) of the second block (70) facing the first secondary groove (30) comprise at least three edge portions, adjacent to each other and comprising at least a first edge portion (61a; 71a) defined by a chamfer and at least a second edge portion (61b; 71b) defined by an angular edge, alternating with each other. Each first edge portion (61a) of the first block (60) is aligned with a second edge portion (71b) of the second block (70), and each second edge portion (61b) of the first block (60) is aligned with a first edge portion (71a) of the second block (70).
B60C 11/12 - Sculptures des bandes de roulement caractérisées par l'utilisation d'entailles étroites ou de traits de scie, p. ex. lamelles
B60C 11/13 - Sculptures des bandes de roulement caractérisées par la section transversale de la rainure, p. ex. pour étayer les parois, ou pour empêcher le coincement de pierres
A process for building tyres for wheels of vehicles, with the following building operations: winding a cut-to-size semifinished element around a forming drum, thereby forming a corresponding component of a tyre, wherein the semi-finished element has opposite ends juxtaposed with each other to form a junction zone; repeating the winding operation until completion of the building operations on the forming drum. During the building operations, a checking operation is performed on the tyre, including: acquiring a two-dimensional image of the tyre; identifying, in the image, at least one junction zone in a radially external position of the tyre; providing reference images, each representing a junction zone type; comparing the at least one identified junction zone with each reference image; selecting a junction zone type; classifying the at least one identified junction zone on the basis of the junction zone type; and generating a stop or a consent signal.
A tyre includes a plurality of blocks which are defined on a tread band and at least one first sipe and one second sipe which are formed on each block. The first sipe extends in a first longitudinal direction and comprises a first linear portion, only one single-wave portion which extends in continuation of the first linear portion and which has a distance from the first edge between 5% and 40% of the distance between the first edge and an opposite second edge, and a second linear portion. Similarly, the second sipe extends in a second longitudinal direction and comprises a first linear portion, only one single-wave portion which extends in continuation of the first linear portion and which has a distance from the second edge between 5% and 40% of the distance between the first edge and the second edge, and a second linear portion.
A plant for producing tyres for vehicle wheels is described. The plant includes a building line configured to build a crown structure. The building line includes a building device configured to build a belt assembly. The building device includes a trolley, a first forming drum, a second forming drum, a first working area including a belt building device, a second working area downstream from the first working area including a depositing device, a first service area downstream from the second working area including a stationary annular holding member, and a second service area downstream from the first service area including a first support member.
A tyre (1) for vehicle wheels comprises a tread band (2) on which a first main groove (10) and a second main groove (20) are defined, as well as at least one secondary groove (30; 40) which extends between the first main groove (10) and the second main groove (20). The secondary groove (30; 40) comprises a central region (33; 43), having a depth less than a depth of the first main groove (10) and the second main groove (20), and a first end region (34; 44) which extends between the central region (33; 43) and the first main groove (10), having an increasing depth from the central region (33; 43) towards the first end (31; 41).
A pneumatic tyre (1) for vehicle wheels comprises a tread band (2) on which a first main groove (10) and a second main groove (20) are defined, as well as a first secondary groove (30) and a second secondary groove (40) which extend between the first main groove (10) and the second main groove (20) and having respectively a first depth (P1) and a second depth (P2), different from each other. A sipe (33) is formed in the bottom (34) of the first secondary groove (30).
A tyre includes a plurality of blocks which are defined on a tread band and at least one first sipe which is formed on each block. The first sipe extends in a first longitudinal direction and includes a first linear portion which substantially extends along the first longitudinal direction, a single-wave portion which extends in continuation of the first linear portion, and a second linear portion which extends in continuation of the single-wave portion. The single-wave portion includes a first segment which extends from the first linear portion as far as a first peak, a second segment which extends from the first peak as far as an opposite second peak and a third segment which extends from the second peak as far as the second linear portion. The angle of inclination of second segment is greater than that of the first segment and the third segment.
The present invention relates to a novel sustainable polyester obtained by the copolymerization of at least one diol, preferably at least two diols, at least one dicarboxylic acid, preferably at least two dicarboxylic acids, more preferably three dicarboxylic acids, and optionally at least one hydroxycarboxylic acid or cyclic lactones thereof, as defined in the description, to a vulcanizable elastomeric composition comprising such a novel sustainable polyester, and to a tire for vehicle wheels and a structural component thereof manufactured with such a vulcanizable elastomeric composition.
B60C 1/00 - Pneumatiques caractérisés par la composition chimique, la disposition ou le mélange physique de la composition
B60C 11/00 - Bandes de roulement des pneumatiquesSculptures des bandes de roulementPièces rapportées antidérapantes
C08G 63/47 - Polyesters modifiés chimiquement par estérification par des acides monocarboxyliques non saturés ou des alcools monohydriques non saturés ou leurs dérivés réactifs
C08G 63/50 - Polyesters modifiés chimiquement par estérification par des alcools monohydriques
C08G 63/685 - Polyesters contenant des atomes autres que le carbone, l'hydrogène et l'oxygène contenant de l'azote
C08G 63/688 - Polyesters contenant des atomes autres que le carbone, l'hydrogène et l'oxygène contenant du soufre
The present invention relates to a vulcanizable elastomeric composition comprising a diene elastomeric polymer, a reinforcing filler, at least one vulcanizing agent, and an amorphous polyester obtained by the copolymerization of at least one diol, preferably at least two diols, at least one dicarboxylic acid, preferably at least two dicarboxylic acids, more preferably three dicarboxylic acids, and optionally at least one hydroxycarboxylic acid or cyclic lactones thereof, as defined in the description, and to a tire for vehicle wheels or a green structural component thereof comprising such a vulcanizable elastomeric composition.
A moulded and vulcanised tyre (5) comprises a radially internal surface (6), having an application area (A) on which a plurality of gas escape routes are created, and a functional insert (1) having an adhesive surface (4a) and an exposed surface (4b) facing away from the adhesive surface (4a). The adhesive surface (4a) is adhered to the radially internal surface (6) of the tyre at the application area (A). The plurality of gas escape routes is configured to evacuate a gas interposed between the adhesive surface (4a) of the functional insert (1) and the radially internal surface (6) of the tyre (5) so as to maximise the contact between the adhesive surface of the functional insert and the radially internal surface of the tyre.
A pressing bladder (103) for a vulcanisation mould (100) has a radially external surface (105) configured to adhere to a radially internal surface of a green tyre (5a) during a moulding and vulcanisation step of the green tyre to obtain a moulded and vulcanised tyre (5). The radially external surface (105) comprises reliefs (107) having the shape of ribs (110) or columns (111) and bridges (112).
A tyre (1 ) for motorcycle wheels is described comprising an equatorial plane (X- X) free from transversal grooves and a tread band (8) extending according to an axial development (L), wherein the tread band (8) comprises, in a plan development thereof, two lateral annular portions (L2, L3) arranged on opposite sides with respect to said equatorial plane (X-X) and each comprising a first lateral annular sub-portion (L2', L3'), proximal with respect to the equatorial plane (X-X), and a second lateral annular sub-portion (L2", L3"), distal with respect to the equatorial plane (X-X). In the tread band (10), a plurality of transversal grooves (12) is defined, which are formed in the lateral annular portions (L2, L3), each having an axial extension equal to at least 30% of the axial half-development (L/2) of the tread band (10) and a first directrix (g') forming with the equatorial plane (X-X) an angle (alpha) having a minimum value (alpha'a) comprised between 15° and 50° at an end (12'a) proximal to the equatorial plane (X-X). The transversal grooves (12) form a circumferential succession of transversal ribs (13) extending up to the axial ends of the tread band (10) and having a first portion (13') having an increasing width moving away from the equatorial plane (X-X) in a first annular sector (S) proximal to the equatorial plane (X-X).
12 - Véhicules; appareils de locomotion par terre, par air ou par eau; parties de véhicules
Produits et services
(1) Tires; pneumatic, semi-pneumatic and/or solid tires; wheels for vehicles; rims; inner tubes and/or other supports to be inserted between tire and rim, namely mousse for tires.
A tyre and related vulcanisable elastomeric compound and elastomeric composition are described. The tyre includes at least one structural element that includes a vulcanised elastomeric material including, before vulcanisation, a vulcanisable elastomeric compound including, before mixing, an elastomeric composition including per 100 phr of diene elastomeric polymer:
(a) 30 to 95 phr of at least one styrene-butadiene polymer (SBR);
(b) 5 to 70 phr of at least one diene elastomeric polymer selected from the group consisting of at least one isoprene polymer (IR), at least one butadiene polymer (BR), or mixtures thereof;
(c) 10 phr to about 120 phr, preferably 20 phr to 100 phr, of at least one white reinforcing filler;
(d) from about 1% to about 20% by weight, relative to the amount of said white reinforcing filler, of at least one silane coupling agent;
(e) 1% to 35% by weight, preferably 5% to 25% by weight, relative to the amount of said silane coupling agent, of a polyamine.
The present invention relates to a big enduro motorcycle tyre for mainly off-road use. By virtue of the particular “cap and base” arrangement of the tread band and to the specific mechanical properties of the compounds which constitute it, the tyre of the invention improves performance both off-road and in road driving, both on dry and wet surfaces.
B60C 11/11 - Sculptures des bandes de roulement dans lesquelles la surface en relief des sculptures est composée uniquement d'éléments isolés, p. ex. d'éléments en forme de blocs
An off-road motorcycle tyre comprises a tread band having a central annular portion extending astride of an equatorial plane (X-X) of the tyre (1) and comprising: - a plurality of circumferentially consecutive central blocks (15) arranged astride of the equatorial plane (X-X) and having a first width (LI) in the axial direction; - a plurality of circumferentially consecutive first lateral blocks (20) arranged next to the central blocks (15) and having a second width (L2) in the axial direction; - a plurality of circumferentially consecutive second lateral blocks (60) arranged next to the central blocks (15) on the opposite side with respect to said plurality of first lateral blocks (20) and having said second width (L2) in the axial direction; wherein the ratio between said second width (L2) and said first width (LI) is comprised between 0.65 and 1.3.
B60C 11/11 - Sculptures des bandes de roulement dans lesquelles la surface en relief des sculptures est composée uniquement d'éléments isolés, p. ex. d'éléments en forme de blocs
An off-road motorcycle tyre comprises a tread band having a maximum chord (C). The tread band comprises a central annular portion (M) extending astride of an equatorial plane (X-X) of the tyre (1) and comprising a plurality of circumferentially consecutive first central blocks (15) arranged next to the equatorial plane (X-X) and a plurality of circumferentially consecutive second central blocks (50) arranged next to the equatorial plane (X-X) on the opposite side with respect to the first central blocks (15), each second central block (50) being axially adjacent to a respective first central block (15). An intermediate annular portion (5) without blocks is arranged astride of the equatorial plane (X-X) and extends between the first central blocks (15) and the second central blocks (50). Each first central block (15) and the respective second central block (50) are arranged at a respective minimum mutual distance in the axial direction such that the ratio between said minimum mutual distance and said predetermined maximum chord (C) is greater than, or equal to, 0.15.
B60C 11/11 - Sculptures des bandes de roulement dans lesquelles la surface en relief des sculptures est composée uniquement d'éléments isolés, p. ex. d'éléments en forme de blocs
A vehicle wheel tyre comprises a tread band, a tread surface, a plurality of blocks defined on the tread band, and at least one sipe formed on at least one of the blocks. The at least one sipe is open on a tread surface portion and at least on one first edge of the block, to define at least one first edge portion and at least one second edge portion adjacent to each other and at least partially bounded by the sipe. The first edge portion is defined by a chamfer extending between the tread surface portion and a wall of the block, and the second edge portion is defined by a corner resulting from the tread surface portion intersecting the wall.
B60C 11/12 - Sculptures des bandes de roulement caractérisées par l'utilisation d'entailles étroites ou de traits de scie, p. ex. lamelles
B60C 11/13 - Sculptures des bandes de roulement caractérisées par la section transversale de la rainure, p. ex. pour étayer les parois, ou pour empêcher le coincement de pierres
A tyre (1) for motorcycle wheels is described comprising a tread band (8) of the “cap-and-base” type comprising a radially outer portion, formed by a central sub-portion (11a) made with a first vulcanized elastomeric material and by a pair of lateral sub-portions (11b, 11c) made with a second vulcanized elastomeric material, and a radially inner portion (12) made with a third vulcanized elastomeric material. The first vulcanized elastomeric material of the central sub-portion (11a) has a dynamic elastic modulus (E′) measured at a frequency of 10 Hz and at 23° C. greater than the dynamic elastic modulus (E′) measured in the same conditions of the second vulcanized elastomeric material of the lateral sub-portions (11b, 11c) and both such vulcanized elastomeric materials have a respective dynamic elastic modulus (E′), again measured at a frequency of 10 Hz and at 23° C., comprised between 5.2 and 6.5 MPa and greater than the dynamic elastic modulus (E′) of the third vulcanized elastomeric material, measured in the same conditions. In the tyre (1), the ratios R1 and R2 between the dynamic elastic modulus and the tandelta of the second vulcanized elastomeric material of the lateral sub-portions (11b, 11c) of the radially outer portion and the dynamic elastic modulus and the tandelta of the third vulcanized elastomeric material of the radially inner portion (12) of the tread band (8), respectively measured at a frequency of 10 Hz and at 100° C. and at a frequency of 10 Hz and at 70° C., are comprised between 0.8 and 1.2.
Method, and system (99), of interacting with a monitoring device (1) fixed to an inner surface (2) of a tyre (3) mounted on a rim, the system (99) comprising a source (90) configured for providing, upon request, an identification code of the monitoring device (1) univocally associated with the monitoring device (1), wherein the source (90) comprises at least one physical means (91) firmly applied to the tyre (3), and an interrogation device (92) configured to obtain the identification code of the monitoring device (1) from the source (90) by at least one respective interaction with the physical means (91), and for performing at least one interaction with the monitoring device (1) based on the identification code of the monitoring device (1) obtained.
A tyre (1) for motorcycle wheels is described comprising a carcass structure (2), a belt structure (6) applied at a radially outer position with respect to the carcass structure (2), and a tread band (8) applied at a radially outer position with respect to the belt structure (6), wherein the carcass structure (2) comprises a carcass layer (2a) which comprises a plurality of reinforcing cords comprising one or more textile yarns comprising a plurality of textile filaments made of a material selected from rayon, PET, PEN, and PEEK, and/or hybrid reinforcing cords comprising a plurality of textile filaments made of a combination of two or more of rayon, PET, PEN, and PEEK, embedded in a vulcanized elastomeric material having a dynamic elastic modulus E′ measured at 70° C. and 100 Hz comprised between 5.0 and 9.0 MPa and a tandelta measured at 70° C. and 100 Hz comprised between 0.130 and 0.170. The vulcanized elastomeric material also comprises a white silica-based reinforcing filler and a residual unreacted amount of a silane coupling agent of the white silica-based reinforcing filler, expressed as an amount of silicon measured by ICP-OES, greater than or equal to 70 ppm.
The present invention relates to a tyre for vehicle wheels comprising at least one structural component comprising a vulcanised elastomeric compound obtained by vulcanising a vulcanisable elastomeric compound made by mixing an elastomeric composition comprising (i) at least one diene elastomeric polymer, and (ii) a reinforcing filler comprising (a) needle-shaped morphology silicate fibres having nanometric size, (b) carbon nanotubes, and (c) optionally, carbon black and/or conventional silica.
The present invention relates to an elastomeric compound for tyres for vehicle wheels, in particular an elastomeric compound for tread band of a tyre, preferably for big enduro motorcycles. By virtue of the use of special diene elastomeric polymers in admixture, preferably associated with liquid polymers, the elastomeric compound incorporated in the tread band gives the tyre long mileage together with high handling, especially in wet conditions.
An apparatus for applying rubberized electronic tags to a tyre being processed. The apparatus has a peeling device defining a sliding path for a continuous band and driving members configured for imposing, on the continuous band, a longitudinal sliding motion along the sliding path with a sliding speed. The continuous band slides along a first abutment body, a recirculation transmission and a second abutment body. The continuous band coming from the first abutment body is first deflected by rotating the direction of the sliding speed of the continuous band and subsequently directed towards the second abutment body.
The present invention relates to a tyre for vehicle wheels comprising at least one structural component comprising a vulcanised elastomeric compound obtained by vulcanising a vulcanisable elastomeric compound made by mixing an elastomeric composition comprising (i) at least one diene elastomeric polymer, and (ii) a reinforcing filler comprising (a) needle-shaped morphology silicate fibres having nanometric size, and (b) finely dispersed carbon black having a surface area NSA greater than 100 m2/g and a surface area OAN greater than 100 ml/100 g, and (c) optionally, conventional silica.
The present invention relates to compositions for elastomeric compounds for tyres, comprising modified diene polymers (A1) terminated with at least one tetrazole group (E) comprising at least one 2,5 disubstituted tetrazole which may be activated by heating, tyre components and tyres for vehicle wheels comprising them. Advantageously, the present modified diene polymers (A1) impart to the compounds lower hot hysteresis and reduced Payne effect and, consequently, lower rolling resistance and wear. Furthermore, the present polymers do not exhibit the processability problems shown by conventional functionalised diene polymers, with high affinity for white fillers.
The invention relates to a process for manufacturing a metallic reinforcing cord (10) for tyres for vehicle wheels. The process comprises providing at least one elongated element (15) comprising at least one metallic wire (11) twisted together with at least one textile yarn (20) and removing said at least one textile yarn (20) from said at least one elongated element (15) to form the aforementioned metallic reinforcing cord (10). Such a metallic reinforcing cord (10) has a helical geometry, consisting only of said at least one metallic wire (11) that extends along a helical path.
The invention relates to a process for manufacturing a metallic reinforcing cord (10) for tyres for vehicle wheels. The process comprises providing at least one elongated element (15) comprising at least one metallic wire (11) twisted together with at least one textile yarn (20) and removing said at least one textile yarn (20) from said at least one elongated element (15) to form the aforementioned metallic reinforcing cord (10). Such a metallic reinforcing cord (10) has a helical geometry, consisting only of said at least one metallic wire (11) that extends along a helical path.
The invention also relates to an apparatus (1) for manufacturing the aforementioned metallic reinforcing cord (10).
The present invention relates to compositions for elastomeric compounds for tyres, comprising polytetrazole cross-linking compounds characterized by precise activation temperatures, tyre components and tyres for vehicle wheels which comprise them. Advantageously, the present polytetrazole cross-linking agents give lower hysteresis and retention of the modulus of the compounds even under stress.
Method and apparats are provided for detecting an aquaplane condition of a tire (805) during the rolling of the tire on a rolling surface (515; 1205), wherein said tire comprises a tread band in which at least one circumferential groove (303-1 - 303-4; 1603-1 - 1603-4) is formed which is provided with at least one wear bar (305-1, 305-2; 1605-1, 1605-8), the method comprising: applying radially internally to the tire a tire monitoring device (810), the tire monitoring device comprising an electronic unit (900) comprising a sensor (930) configured for detecting physical quantities indicative of deformations experienced by the tire in the rolling on the rolling surface and for outputting measurements of said physical quantities, monitoring said measurements of said physical quantities during the rolling of the tire on the rolling surface and determining a passage of said monitoring device in correspondence of a contact zone (510) of the tire with said rolling surface.
B60C 23/00 - Dispositifs pour mesurer, signaler, commander ou distribuer la pression ou la température des pneumatiques, spécialement adaptés pour être montés sur des véhiculesAgencement sur les véhicules des dispositifs de gonflage des pneumatiques, p. ex. des pompes ou des réservoirsAménagements pour refroidir les pneumatiques
B60T 8/172 - Détermination des paramètres de commande utilisés pour la régulation, p. ex. par des calculs impliquant des paramètres mesurés ou détectés
Method of manufacturing a tyre sensing device (1), comprising: providing a mould (20) comprising a protruding element (30) protruding from the moulding surface (26), providing an assembly (2) comprising an electronic unit (3) comprising a sensor (4), a processing unit and a receiver-transmitter, and an electrical power supplier (5) connected to the electronic unit, placing the assembly in the moulding cavity with the sensor in contact with the protruding element, filling the moulding cavity with a precursor material of a polymeric material, hardening the precursor material to make an encapsulating body (9) in polymeric material, wherein the encapsulating body embeds the assembly, keeping the protruding element and the sensor (4) pressed against each other, wherein the precursor material also flows around the protruding element and extracting from the moulding cavity the sensing device comprising the encapsulating body and the assembly, separating the protruding element from the sensor (4) to obtain a through opening (14) in the encapsulating body.
B29D 30/00 - Fabrication de pneumatiques, de bandages pleins ou de leurs parties constitutives
B29C 39/10 - Moulage par coulée, c.-à-d. en introduisant la matière à mouler dans un moule ou entre des surfaces enveloppantes sans pression significative de moulageAppareils à cet effet pour la fabrication d'objets de longueur définie, c.-à-d. d'objets séparés en incorporant des parties ou des couches préformées, p. ex. coulée autour d'inserts ou sur des objets à recouvrir
B29C 45/14 - Moulage par injection, c.-à-d. en forçant un volume déterminé de matière à mouler par une buse d'injection dans un moule ferméAppareils à cet effet en incorporant des parties ou des couches préformées, p. ex. moulage par injection autour d'inserts ou sur des objets à recouvrir
B60C 23/04 - Dispositifs avertisseurs actionnés par la pression du pneumatique montés sur la roue ou le pneumatique
77.
PROCESS AND APPARATUS FOR ASSOCIATING FUNCTIONAL INSERTS WITH TYRES FOR VEHICLE WHEELS
The invention is related to a process and apparatus for associating functional inserts to tyres for vehicle wheels. The apparatus includes a transfer unit (16) carrying a handling device (17) comprising a grip member (20), a contrast member (21), and at least one thrust actuator (29) operating between said grip member (20) and contrast member (21). While the functional insert (7) is retained at an exposed surface (7b) thereof by the grip member (20), the grip member (20) and the contrast member (21) are pushed towards each other by the thrust actuator (29), to press the functional insert (7) and the radially inner surface (6) of the tyre (2) against each other with mutually equal and opposite forces that mutually balance out each other without transmitting stress to the transfer unit (16).
The invention is related to a process and a plant for fixing a functional insert to a tyre. The plant (10) comprises an application station (15), a loading station (11), a first handling device (27) that is configured for performing an application sequence on the functional insert (1) and a second handling device (28) that is configured for performing a consolidation sequence on the functional insert (1).
A process and apparatus for constraining a functional insert (100) to a tyre (200) for vehicle wheels provide for positioning the functional insert (100) so that its central axis (B) is perpendicular to a radially inner surface (201) of said tyre (200), arranging a presser (3) and applying, by means of said presser (3), a first localised pressure on a first portion (P1) of the exposed surface (102b), located at the internal zone (101a) of the functional insert (100), and a second localised pressure on a second portion (P2) of the exposed surface (102b) of the functional insert (100), translating, during the application of the second pressure, at least part of the presser (3) transversally away from the central axis (B) and through the peripheral zone (101b) of the exposed surface (102b).
A functional insert (7) is applied to a tyre (2) such to fix an attachment surface (7a) of the insert by an attachment interface (G) interposed between the functional insert (7) and the tyre (2). The application provides for preforming the functional insert (7) in order to confer to the attachment surface (7a) a shaping that is substantially convex with the central zone (A) axially projecting with respect to the peripheral zone (B) along the central geometric axis (K). The central zone (A) is pressed against the radially inner surface (6) of the tyre (2), maintaining the peripheral zone (B) of the functional insert (7) spaced from the radially inner surface (6) by a retention action exerted along the peripheral zone (B). Subsequently, the peripheral zone (B) is pressed against the radially inner surface (6).
The present invention relates to a tyre for vehicle wheels which comprises at least one structural element comprising a vulcanised elastomeric compound obtained by vulcanisation of an elastomeric composition comprising per 100 phr of diene elastomeric polymer: (i) a predispersion of (a) a first diene elastomeric polymer, (b) a copolymer of vinylpyridine with a conjugated diolefin and/or a monovinylarene, and (c) lignin, said predispersion being in an amount to provide the elastomeric composition with at least 5 phr of said first diene elastomeric polymer and at least 5 phr of lignin, (ii) 0 to 95 phr of a second diene elastomeric polymer, (iii) at least 5 phr of a reinforcing filler, (iv) optionally, a reinforcing resin comprising at least 1 phr of a methylene acceptor compound associated with at least 1 phr of a methylene donor compound, and (v) 0.1 to 12 phr of at least one vulcanising agent.
UNIVERSITA' DEGLI STUDI DI MILANO - BICOCCA (Italie)
Inventeur(s)
Giannini, Luca
Tadiello, Luciano
Guerra, Silvia
Papagni, Antonio
Monti, Mauro
De Luca, Davide Maria
Abrégé
The present invention relates to compositions for elastomeric compounds for high- performance tyres, such as motorsport tyres, comprising specific reversible cross- linking modifying agents, tyre components and vehicle wheel tyres comprising them. The present elastomeric compounds, by virtue of their particular hysteretic behaviour, allow the manufacture of tyres characterised by high roadholding and handling in all driving conditions.
C08L 19/00 - Compositions contenant des caoutchoucs non prévues dans les groupes
B60C 1/00 - Pneumatiques caractérisés par la composition chimique, la disposition ou le mélange physique de la composition
83.
METHOD FOR EQUIPPING A TYRE WITH A DEVICE FOR MONITORING AT LEAST ONE PARAMETER CHARACTERISTICS OF AN INTERACTION BETWEEN THE TYRE AND A TYRE ROLLING SURFACE, AND TYRE EQUIPPED WITH A MONITORING DEVICE
A method is provided for equipping a tyre (1205) with a tyre monitoring device (1210). The tyre (1205) comprises a tread band (1220) in which at least one circumferential groove (1603-1 – 1603-4) is formed, provided with at least one wear bar (1605-1, 1605-2). The method comprises applying the tyre monitoring device (1210) radially internally (1215) to the tyre (1205), in a position, opposed to said tread band (1220), which is immediately preceding the at least one wear bar (1605-2) in a sense of rotation (1610) of the tyre (1205). A corresponding tyre equipped with a monitoring device is also provided.
B60C 23/00 - Dispositifs pour mesurer, signaler, commander ou distribuer la pression ou la température des pneumatiques, spécialement adaptés pour être montés sur des véhiculesAgencement sur les véhicules des dispositifs de gonflage des pneumatiques, p. ex. des pompes ou des réservoirsAménagements pour refroidir les pneumatiques
84.
METHOD AND SYSTEM FOR ESTIMATING THE STATE OF A ROAD SURFACE
Method and system for estimating the state of a road surface (40) wherein it is provided to associate a monitoring unit (2) to a tyre (11) of a vehicle, said monitoring unit (2) comprising at least one detecting element (3) adapted to measure a quantity descriptive of a deformation of the tyre (11); fitting said tyre (11) to a wheel (20) of said vehicle and operating said vehicle so as to cause rotation of said tyre (11) on a road segment having said road surface (40) wherein, due to said fitting and operating, said tyre (11) is deformed in a deformation zone (46, 42, 47, 44). For each revolution of the tyre (11), it is also provided for: obtaining a signal representative of said quantity measured during the rotation of the tyre (11); frequency filtering said signal in a first frequency band so as to obtain a first filtered signal and in a second frequency band, different from said first frequency band, so as to obtain a second filtered signal; processing the first filtered signal so as to obtain a value of a first parameter indicative of the variability of said first filtered signal in said first frequency band, said processing being carried out at a portion of the first filtered signal that corresponds to a rolling step of the tyre (11) wherein said monitoring unit (2) is located in said deformation zone (46, 20 42, 47, 44) of the tyre (11); processing the second filtered signal so as to obtain a value of a second parameter indicative of the variability of said second filtered signal in said second frequency band, said processing being carried out at a portion of the second filtered signal that corresponds to a rolling step of the tyre (11) wherein said monitoring unit (2) is in said deformation zone (46, 42, 47, 44) of the tyre (11).
B60T 8/172 - Détermination des paramètres de commande utilisés pour la régulation, p. ex. par des calculs impliquant des paramètres mesurés ou détectés
B60W 40/06 - Calcul ou estimation des paramètres de fonctionnement pour les systèmes d'aide à la conduite de véhicules routiers qui ne sont pas liés à la commande d'un sous-ensemble particulier liés aux conditions ambiantes liés à l'état de la route
Method for manufacturing a tyre sensing device (1), comprising: - providing a mould (20) comprising in the moulding cavity (25) at least two spacers (31), distinct and separate; - providing an assembly (2) comprising: - an electronic unit (3) comprising a sensor (4), a processing unit and a receiver-transmitter; and - an electric power supplier (5) electrically connected to the electronic unit (3); - placing said assembly into the moulding cavity; - filling the moulding cavity with a precursor material that also flows at the spacers (31); - hardening the precursor material to make an encapsulating body (9) of polymeric material, in one piece and incorporating in contact the assembly, where the coupling surface (11) of the encapsulating body (9) lies on a reference plane (22) forming part of the moulding surface, wherein at least three surface points of the assembly are kept in contact with, or in proximity to, corresponding surface points on the free ends of the spacers (31) positioned with a predetermined spatial relationship to the reference plane (22) of the moulding surface, and wherein the three surface points of the assembly are positioned with a predetermined spatial relationship to the development plane (32) of the assembly to satisfy a predetermined parallelism requirement between the development plane (32) and the coupling surface (11) of the encapsulating body; and - extracting from the moulding cavity (25) the sensing device (1).
A tyre for motor vehicles comprises a carcass ply (3), a belt structure (11) and a reinforcement structure (16) with zero-degree reinforcement cords (17). The belt structure (11) is formed by a first belt strip (12) and a second belt strip (13) mutually and axially adjacent or partially superimposed at or in proximity to a middle line plane (M) of the tyre (1). The first belt strip (12) and the second belt strip (13) have belt cords (14, 15) which delimit with the circumferential direction (C) of the tyre (1) angles (α, β) of between 25° and 40° and an angle (y) of between 50° and 80° between them. Each reinforcement cord (17) has a "tensile load - elongation" curve comprising a first section (T1), placed upstream of a predefined percentage elongation (Sp), a second section (T2), placed downstream of the predefined percentage elongation (Sp). A second slope of the second section (T2) is greater than a first slope of the first section (T1).
B60C 9/20 - Structure ou disposition des ceintures, des couches de protection, des couronnes de renforcement ou des couches amortissantes constituées par des nappes gommées ayant chacune leurs fils disposés sensiblement en parallèle
B60C 9/22 - Structure ou disposition des ceintures, des couches de protection, des couronnes de renforcement ou des couches amortissantes constituées par des nappes gommées ayant chacune leurs fils disposés sensiblement en parallèle les nappes étant disposées avec tous leurs fils orientés selon la circonférence du pneumatique
B60C 9/04 - Carcasses les fils de renforcement de chaque pli de la carcasse étant sensiblement parallèles
A Tyre (1) suitable to be mounted on a first wheel (W1) of a vehicle (C) with a determined camber angle (α), comprising: - a tread band (2), in a radially outer position, comprising a first and a second lateral axial portion (21, 22), said tread band (2) forming a footprint area (20) which, due to said camber angle (α), is asymmetrical and comprises, a first footprint length (L1) at said first lateral axial portion (21) and a second footprint length (L2) at said second lateral axial portion (22) such that said first footprint length (L1) is greater than said second footprint length (L2), said tread band (2) comprising a first circumferential groove (3) placed at said first lateral axial portion (21) and at a distance (d) from said equatorial plane (M) of said tyre (1) between 5% and 15% of a width of said tread band (2); - a monitoring device (10) constrained to a radial internal surface (L) of said tyre (1), wherein said monitoring device (10) is radially positioned at said first circumferential groove (3).
A car tyre (100), in particular a so-called "summer" tyre is described. The tread band (20) of the tyre comprises a central region (L1) separated from two shoulder regions, respectively a first shoulder region (L2) and a second shoulder region (L3). The first (L2) and second (L3) shoulder regions are provided with large grooves evenly distributed along the circumferential development of the tyre. Said first (L2) and second (L3) shoulder regions are respectively separated from the central region (L1) by two circumferential grooves, in particular a first circumferential groove (1) and a second circumferential groove (2). Furthermore, the central region (L1) of the tyre has been designed so as to form three circumferential ribs (5, 6, 7) defined by a third (3) and a fourth (4) circumferential groove located in said central region (L1). The first (L2) and second (L3) circumferential grooves, as well as the third (3) and the fourth (4) circumferential grooves have substantially the same width. The central region (L1) has a low void-to-rubber ratio, and further comprises transverse grooves (10, 11, 12) extending in a respective circumferential rib (5, 6, 7). Such transverse grooves (10, 11, 12) are narrower than the large grooves in the two shoulder regions and are all arranged with their inclination angle increasing moving away from the first shoulder region (L2).
A tyre (105) monitoring device (200) configured to be applied to a radially internal surface (115) of the tyre (105) to be monitored, the monitoring device comprising: a container (215, 220) including an upper casing portion (220) having walls which internally delimit a hollow space (325), the upper casing portion (220) having an opening (230) suitable for putting the hollow space (325) in communication with the environment external to the monitoring device (200); an electronic unit (205) housed in the container (220) and including at least a pressure sensor (330) having a sensitive surface exposed to the hollow space (325), the pressure sensor being configured to detect a pressure in the hollow space (325), and a sealing element (235) associated with the opening (230), the sealing element (235) being permeable to gaseous fluids to allow communication of gaseous fluids between the environment external to the monitoring device (200) and the hollow space (325) inside the container (220), and impervious to non-gaseous bodies to prevent penetration, from the environment external to the monitoring device (200) into the hollow space (325), of non-gaseous bodies.
A monitoring device (200) of a tyre (105) is configured to be applied to an internal surface (115) of the tyre (105) to be monitored and includes: a container (215, 220), an electronic unit (205), housed in said container (215, 220), which includes a printed circuit board assembly comprising a printed circuit board (320) on which electrical and/or electronic components of the electronic unit (205) are mounted. The printed circuit board (320) has a face (835) on which electrical contact pads (805) are provided, perimetral to respective mounting areas (705), provided on said face (835), for mounting said electrical and/or electronic components. At least one of the electrical and/or electronic components mounted on the printed circuit board (320) is packaged in a package (605) having, at a respective lower face (830), perimetral electrical contact pads (610), arranged along perimetral sides of the package, connected through solder joints respectively to the contact pads (805) of the printed circuit board (320) perimetral to the mounting area (705) of the at least one electrical and/or electronic component provided on the face (835) of the printed circuit board. The perimetral electrical contact pads (610) of the package and said solder joints are covered by a filler material (905). A method of manufacturing a tyre monitoring device (200) is also described.
B60C 23/04 - Dispositifs avertisseurs actionnés par la pression du pneumatique montés sur la roue ou le pneumatique
H01L 23/24 - Matériaux de remplissage caractérisés par le matériau ou par ses propriétes physiques ou chimiques, ou par sa disposition à l'intérieur du dispositif complet solide ou à l'état de gel, à la température normale de fonctionnement du dispositif
H05K 3/28 - Application de revêtements de protection non métalliques
91.
METHOD AND SYSTEM FOR ADJUSTING AN ANTI-SKID CONTROL SYSTEM OF A VEHICLE
Method and system (99) for adjusting an anti-skid control system (100) of a vehicle (1 ) moving on a surface (R), the system comprising an actuation device (9) operatively connected to wheels (W) of the vehicle (1 ) and a processing unit (8) programmed to perform the following steps of the method: - in response to a request (RS) of speed variation of the vehicle (1 ), applying over time a respective torque (Tr) to one or more wheels (W); - for a tyre (T1 ) mounted on a respective wheel (W1 ) having a respective current value (Ac) of the first parameter less than or equal to a predetermined target value (Atg), performing a routine of estimation of an operational value (Aop) of the first parameter for which a maximum friction (lie) is obtained between the tyre (T1 ) and the surface comprising: i) estimating a respective current value (Uc) of a second parameter (U) representative of a friction between the tyre (T1 ) and the surface (R); ii) estimating the operational value (Aop) of the first parameter as a function of the respective current value (Ac) of the first parameter and of the respective current value (Uc) of the second parameter; - on condition that the respective torque (Tr) is still applied, adjusting the anti-skid control system (100) by updating the predetermined target value (Atg) of the first parameter with a new target value (AtgN) of the first parameter as a function of the operational value (Aop) of the first parameter.
B60T 8/1761 - Régulation des freins spécialement adaptée pour la prévention du dérapage excessif des roues pendant la décélération, p. ex. ABS en fonction de la dynamique de la roue ou du frein, p. ex. du dérapage de la roue, de l'accélération de la roue ou du taux de variation de la pression du fluide de frein
B60T 8/1763 - Régulation des freins spécialement adaptée pour la prévention du dérapage excessif des roues pendant la décélération, p. ex. ABS en fonction du coefficient de frottement entre les roues et la surface du sol
B60W 40/12 - Calcul ou estimation des paramètres de fonctionnement pour les systèmes d'aide à la conduite de véhicules routiers qui ne sont pas liés à la commande d'un sous-ensemble particulier liés à des paramètres du véhicule lui-même
B60T 8/172 - Détermination des paramètres de commande utilisés pour la régulation, p. ex. par des calculs impliquant des paramètres mesurés ou détectés
92.
ELASTOMERIC COMPOSITIONS AND COMPOUNDS COMPRISING A NEW SECONDARY CROSS-LINKING SYSTEM AND TYRES COMPRISING THEM
The present invention relates to elastomeric compositions and compounds for tyres, comprising a novel secondary cross-linking system comprising at least one methylene donor agent of formula (I) wherein R1 is ethyl and at least one phenolic resin as a methylene acceptor agent, and vehicle wheel tyres comprising them. The new secondary cross-linking system of the invention allows imparting the materials optimal stiffness, thermal stability, breaking strength and adhesion to the reinforcement elements, improving the cross-linking kinetics and the processability of the compound, while at the same time reducing or maintaining the hysteresis. These materials which include this cross-linking system, which is more harmless than conventional ones because it is free of resorcinol, formaldehyde and similar substances, are advantageously used in those tyre components that require a certain rigidity and resistance to breakage and/or high adhesion to textile or metal reinforcement elements together with a low rolling resistance.
The present invention relates to elastomeric compositions and compounds for tyres, comprising a novel secondary cross-linking system comprising at least one methylene donor agent of formula (I) and at least one methylene acceptor agent, and tyres for vehicle wheels comprising them. The new secondary cross-linking system of the invention allows imparting the materials optimal stiffness, breaking strength and adhesion to the reinforcement elements, improving the cross-linking kinetics and the processability of the compound, while at the same time reducing or maintaining the hysteresis. These materials are advantageously used in those tyre components that require a certain rigidity and resistance to breakage and/or high adhesion to textile or metal reinforcement elements together with a low rolling resistance.
A process for transferring an annular component (C) used in building tyres comprises arranging a preparation drum (2) extended around a rotation axis (X), winding a semi-finished product according to a substantially annular or cylindrical shape around said preparation drum (2) so as to manufacture an annular component (C) of a tyre, removing the preparation drum (2) from the annular component (C) by axially moving said preparation drum (2) and supporting the annular component (C) by a support device (3) concurrently with said removal.
Method and system (99) for detecting an interaction condition (IC) of a tyre (3) with a surface (900), wherein the system (99) comprises a monitoring device (4) fixed to an inner surface (5) of the tyre (3) at a crown portion (6) and configured to acquire a radial acceleration signal (AS) from the crown portion (6), and a processing unit (8) in communication with the monitoring device (4) and programmed to receive from the monitoring device (4) the radial acceleration signal (AS) and to perform the following steps of the method: calculating an adjustment factor Af according to the formula Af = ASavg + w2R*, where ASavg is an average value of the radial acceleration signal (AS), w is the angular velocity of the tyre, and R* is a parameter representative of a radius of the tyre (3); obtaining an adjusted radial acceleration signal (ASa) by a difference between the radial acceleration signal (AS) and the adjustment factor (Af); detecting the interaction condition (IC) as a function of the adjusted radial acceleration signal (ASa).
B60T 8/172 - Détermination des paramètres de commande utilisés pour la régulation, p. ex. par des calculs impliquant des paramètres mesurés ou détectés
B60W 40/06 - Calcul ou estimation des paramètres de fonctionnement pour les systèmes d'aide à la conduite de véhicules routiers qui ne sont pas liés à la commande d'un sous-ensemble particulier liés aux conditions ambiantes liés à l'état de la route
B60W 50/00 - Détails des systèmes d'aide à la conduite des véhicules routiers qui ne sont pas liés à la commande d'un sous-ensemble particulier
97.
Vehicle tyre with balanced lateral forces for reduced rolling resistance
A vehicle tyre with an asymmetric internal structure and external profile relative to its middle line plane. When mounted on a rim and installed with a camber angle, the rotating tyre generates lateral forces during straight-line running: a camber force from the wheel's inclination, a structural force from the asymmetric internal construction, and a conicity force from the asymmetric external profile. The conicity force opposes the camber force direction, and its magnitude remains below the structural force magnitude. This configuration enables control of the resulting lateral force while reducing rolling resistance during straight-line operation.
Method and system (99) for detecting an aquaplaning condition (IC) of a tyre (3) with a surface (900), wherein the system (99) comprises a monitoring device (4) fixed to an inner surface (5) of the tyre (3) at a crown portion (6) and configured to acquire a radial acceleration signal (AS) from the crown portion (6), and a processing unit (8) in communication with the monitoring device (4) and programmed to receive from the monitoring device (4) the radial acceleration signal (AS) and to perform the following steps of the method: obtaining an adjustment factor (Af) representative of an offset between one or more acquired values of radial acceleration and respective current values; obtaining an adjusted radial acceleration signal (ASa) by a difference between the radial acceleration signal (AS) and the adjustment factor (Af); identifying, in the adjusted radial acceleration signal (ASa), a sub-portion (ASaP) of the signal corresponding to a passage of the crown portion (6) internally to a footprint portion of the tyre (3); calculating a comparison parameter (RV) as a function of an average value (mASa) of the signal (ASa) in the sub-portion (ASaP); detecting the aquaplane condition (IC) as a function of a comparison between the comparison parameter (RV) and at least one threshold value.
B60T 8/172 - Détermination des paramètres de commande utilisés pour la régulation, p. ex. par des calculs impliquant des paramètres mesurés ou détectés
B60W 40/06 - Calcul ou estimation des paramètres de fonctionnement pour les systèmes d'aide à la conduite de véhicules routiers qui ne sont pas liés à la commande d'un sous-ensemble particulier liés aux conditions ambiantes liés à l'état de la route
B60W 50/00 - Détails des systèmes d'aide à la conduite des véhicules routiers qui ne sont pas liés à la commande d'un sous-ensemble particulier
The present invention relates to a self-sealing tyre for vehicle wheels comprising at least one carcass ply, a tread band applied in a radially external position with respect to said carcass ply in a crown portion, at least one liner applied in a radially internal position with respect to said carcass ply, a sealing assembly applied in a radially internal position with respect to said liner and axially extending at least at a part of the crown portion; wherein said sealing assembly comprises a permanent multilayer self-supporting film comprising at least two outer layers of polyamide and at least one inner layer of polyolefin, wherein said multilayer self-supporting film has a residual relaxation strength of between 1 MPa and 20 MPa, preferably between 5 MPa and 15 MPa, and a layer of sealing material associated with and supported by said permanent multilayer self-supporting film; wherein said permanent multilayer self-supporting film is radially internal to the layer of sealing material and said layer of sealing material is placed substantially in contact with said liner.
B60C 1/00 - Pneumatiques caractérisés par la composition chimique, la disposition ou le mélange physique de la composition
B60C 5/14 - Pneumatiques ou chambres intérieures gonflables sans éléments internes gonflables distincts, p. ex. pneumatiques sans chambre à air dont la section transversale est ouverte sur la jante avec chemise ou revêtement imperméable sur la paroi intérieure du pneumatique
B60C 19/00 - Autres structures ou éléments du pneumatique
B60C 19/12 - Dispositifs pour empêcher les perforations
A motorcycle tyre comprises a tread band having a central annular portion (A) extending astride of an equatorial plane (X-X) of the tyre and two lateral annular portions arranged on opposite sides with respect to the central annular portion (A). The central annular portion (A) comprises a plurality of circumferential grooves (20; 60) each having an intermediate portion (21; 61) and two end portions (22, 23; 62, 63) arranged on opposite sides with respect to the intermediate portion (21; 61) along a circumferential direction. The intermediate portion (21; 61) has a width (W1a) less than the maximum width (W1b, W1c) of each of the two end portions (22, 23; 62, 63).
