Abrégé

An exhaust valve for an internal combustion engine comprises a valve disc having a first side (14) and a second side (16), a valve stem extending from the first side of the valve disc, and an annular valve seat area (11) located at the first side of the valve disc. The annular valve seat area (11) is of a nickel-base alloy or a chromium-base alloy and has a valve seat surface. The annular valve seat area has at least a first annular portion (43) located in between two second annular portions (42). The first annular portion has lower hardness than the two second annular portions.

Classes IPC  ?

• F01L 3/04 - Corps de soupapes ou sièges de soupapes ayant un revêtement
• F01L 3/02 - Emploi de matériaux spécifiques pour corps de soupapes ou leurs siègesCorps de soupapes ou sièges de soupapes composés de plusieurs matériaux différents
• C21D 1/18 - DurcissementTrempe avec ou sans revenu ultérieur
• C22C 19/05 - Alliages à base de nickel ou de cobalt, seuls ou ensemble à base de nickel avec du chrome
• C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
• B21K 1/22 - Fabrication d'éléments de machines de parties de soupapes de soupapes-champignon, p. ex. pour moteurs à combustion interne
• B23P 15/00 - Fabrication d'objets déterminés par des opérations non couvertes par une seule autre sous-classe ou un groupe de la présente sous-classe

Abrégé

A fuel valve (1) for injecting fuel into the combustion chamber of a large two-stroke self-igniting internal engine combustion engine, with a valve needle (20) that is resiliently biased towards a valve seat (22). The effective pressure surface that causes fuel pressure to urge the valve needle (20) in the opening direction increases significantly when the valve needle (20) has lift from the valve seat (22). A supplementary effective pressure surface (29) is provided on the valve needle (20). The supplementary effective pressure surface (29) creates a force urging the valve needle (20) towards the valve seat (22) when the supplementary effective pressure surface (29) is exposed to fuel pressure.

Classes IPC  ?

• F02M 47/02 - Appareils d'injection à fonctionnement périodique avec clapets d'injection actionnés par la pression du fluide du type accumulateurs-injecteurs, c.-à-d. dans lesquels la pression du combustible dans l'accumulateur tend à ouvrir et la pression du combustible dans une autre chambre tend à fermer les clapets d'injection et comportant des moyens pour supprimer périodiquement cette pression de fermeture
• F02M 61/04 - Injecteurs de combustible non couverts dans les groupes ou comportant des clapets
• F02M 61/10 - Autres injecteurs avec corps des clapets allongés, p. ex. du type soupapes à aiguille

Abrégé

A fuel valve (50) for injecting gaseous fuel into the combustion chamber of a self-igniting internal combustion engine. The fuel valve (50) comprises an elongated fuel valve housing (52) with a rear end and a front end, a nozzle (54) with a plurality of nozzle holes (56) opening to a sac volume (55) inside the nozzle (54), the nozzle (54) being disposed at the front end of the elongated valve housing (52), a gaseous fuel inlet port (53) in the elongated fuel valve housing (52) for connection to a source (60) of high pressure gaseous fuel, an axially displaceable valve needle (61) slidably received in a longitudinal bore (77) in the elongated valve housing (52), the axially displaceable valve needle (61) having a closed position and an open position, the axially displaceable valve needle (61) rests on a valve seat (69) in the closed position and the axially displaceable valve needle (61) has lift from the valve seat (69) in the open position, the valve seat (69) being placed between a fuel chamber (58) and an outlet port (68), the fuel chamber (58) is fluidly connected to the gaseous fuel inlet port (53), the outlet port (58) is fluidly connected to the sac volume (55) in the nozzle (54), an actuator system for controllably moving the axially displaceable valve needle (61) between the closed position and the open position, an ignition liquid inlet port (78,98) for connection to a source of high pressure ignition liquid (57), and an ignition liquid supply conduit (76,99) connecting the ignition liquid inlet port (78,98) to the fuel chamber (58), the ignition liquid supply conduit (76,99) including a fixed flow restriction.

Classes IPC  ?

• F02M 43/04 - Injecteurs particuliers à cet effet

Abrégé

An exhaust valve spindle for an exhaust valve in an internal combustion engine has a shaft and a valve disc at the lower end of the shaft, which valve disc at its upper surface has a seat area. The seat area is of a seat material comprising at least from 34.0 to 44.0% Cr, an aggregate amount of Nb and Ta in the range from at least 2.8 to 6.1%, from 0.3 to 2.0% Ti, at the most 0.2% Al, at the most 0.04% B, at the most 0.8% Fe, at the most 0.04% C, at the most 0.4% Si, and a balance of Ni, where the amount of Ti+Nb+0.5×Ta is in the range from 3.4 to 6.6%, and where the amount of Nb+0.5×Ta is less than 3.0% if the amount of Ti is larger than 1.5%.

Classes IPC  ?

• B22F 5/00 - Fabrication de pièces ou d'objets à partir de poudres métalliques caractérisée par la forme particulière du produit à réaliser
• F16K 41/00 - Joints d'étanchéité pour tiges
• F01L 3/04 - Corps de soupapes ou sièges de soupapes ayant un revêtement
• C22C 19/05 - Alliages à base de nickel ou de cobalt, seuls ou ensemble à base de nickel avec du chrome
• C22F 1/08 - Modification de la structure physique des métaux ou alliages non ferreux par traitement thermique ou par travail à chaud ou à froid du cuivre ou de ses alliages
• B22F 3/15 - Compression isostatique à chaud
• C22C 1/04 - Fabrication des alliages non ferreux par métallurgie des poudres

Abrégé

A fuel valve (50) for injecting gaseous fuel into the combustion chamber of a self-igniting internal combustion engine. The fuel valve (50) comprises an elongated fuel valve housing (52) with a rear end and a front end, a nozzle (54) with an elongated nozzle body with a hollow interior that forms a chamber (55) connected to nozzle holes (56), the nozzle (54) being arranged at the front end of the fuel valve housing (52), a gaseous fuel inlet port (53) in the elongated fuel valve housing (52) for connection to a source (60) of high pressure gaseous fuel, an ignition liquid inlet port (78,98) for connection to a source of ignition liquid (57), means (61,69,53,58,61,69) for establishing a timed fluidic connection between the gaseous fuel inlet port and the ignition space (55), and means (61,67,69,76,79,85,98,99) configured for a timed delivery of a finite volume of ignition liquid to the chamber (55) for igniting the gaseous fuel inside the chamber (55).

Classes IPC  ?

• F02M 43/04 - Injecteurs particuliers à cet effet
• F02M 61/04 - Injecteurs de combustible non couverts dans les groupes ou comportant des clapets
• F02M 61/10 - Autres injecteurs avec corps des clapets allongés, p. ex. du type soupapes à aiguille

Abrégé

The invention relates to the lubrication of the cylinders (1) of internal combustion engines that burn acid-generating fuels, wherein several lubricants having different neutralization capability are used. According to the invention an optimization of the lubrication and of the acid neutralization and thus high operational reliability and economic efficiency can be achieved in that at least one lubricant having a neutralization capability that does not exceed the neutralization requirement in any possible use case and at least one lubricant having an neutralization capability that is not less than the neutralization requirement in any possible use case are used and that the lubricants used are individually fed to the cylinder interior in metered amounts and are mixed in the cylinder interior.

Classes IPC  ?

• F01M 11/02 - Aménagements des conduits de lubrification
• F01M 1/08 - Systèmes de lubrification caractérisés par des dispositifs de lubrification par projection

Abrégé

The invention relates to a system for influencing the sliding properties of the sliding surfaces of a sliding pair by supplying the sliding surfaces with a conditioning agent, a plurality of different components being used to produce the conditioning agent. A good functioning of the sliding pair can be obtained in the long term by dynamically conditioning the sliding properties of the sliding surfaces, the sliding situation of the sliding surfaces being continuously monitored and the conditioning agent supplied to the sliding surfaces being optimized depending on the current sliding situation.

Classes IPC  ?

• F01M 1/16 - Commande de la quantité ou de la pression du lubrifiant
• F01M 3/04 - Lubrification spécialement adaptée pour les moteurs avec compression du mélange air-carburant en carter ou pour les autres moteurs dans lesquels le lubrifiant est incorporé au carburant, à l'air ou au mélange air-carburant pour lubrification des hauts de cylindre uniquement
• F01M 9/02 - Dispositifs de lubrification ayant des caractéristiques importantes non couvertes dans les groupes ou présentant un intérêt autre que celui visé par ces groupes ayant des moyens pour introduire des additifs au lubrifiant
• F16N 29/02 - Dispositifs particuliers dans les installations ou les systèmes de lubrification indiquant ou détectant des conditions indésirablesUtilisation des dispositifs sensibles à ces conditions dans les installations ou les systèmes de lubrification agissant sur l'alimentation en lubrifiant

Abrégé

An exhaust valve spindle for an exhaust valve in an internal combustion engine has a shaft and a valve disc at the lower end of the shaft, which valve disc at its upper surface has a seat area. The seat area is of a seat material comprising at least from 34.0 to 44.0% Cr, an aggregate amount of Nb and Ta in the range from at least 2.8 to 6.1%, from 0.3 to 2.0% Ti, at the most 0.2% Al, at the most 0.04% B, at the most 0.8% Fe, at the most 0.04% C, at the most 0.4% Si, and a balance of Ni, where the amount of Ti+Nb+0.5×Ta is in the range from 3.4 to 6.6%, and where the amount of Nb+0.5×Ta is less than 3.0% if the amount of Ti is larger than 1.5%.

Classes IPC  ?

• F16K 41/00 - Joints d'étanchéité pour tiges
• F01L 3/04 - Corps de soupapes ou sièges de soupapes ayant un revêtement
• C22C 19/05 - Alliages à base de nickel ou de cobalt, seuls ou ensemble à base de nickel avec du chrome
• C22F 1/08 - Modification de la structure physique des métaux ou alliages non ferreux par traitement thermique ou par travail à chaud ou à froid du cuivre ou de ses alliages
• B22F 3/15 - Compression isostatique à chaud
• B22F 5/00 - Fabrication de pièces ou d'objets à partir de poudres métalliques caractérisée par la forme particulière du produit à réaliser
• C22C 1/04 - Fabrication des alliages non ferreux par métallurgie des poudres

Abrégé

At an engine of the crosshead type, especially a big sized two stroke diesel engine, having a crankcase (1) as well as at least one cylinder (3) containing a cylinder liner (4), which extends in a surrounding scavenge chamber (7) and is ending above a chamber bottom (8) of the scavenge chamber (7), and wherein a piston rod (11 ) is provided, which connects a piston (5) going up and down within the cylinder liner (4) with an associated crosshead (10) arranged in the crankcase (1 ), and which penetrates a seal packing (15) provided in the chamber bottom (8), pollution of the system oil of the crankcase (1 ) by cylinder oil and/or combustion residues can be prevented in that the blast generated during the start of the piston upstroke and passing the lower edge of the cylinder liner (4) is diverted from a radial direction to an at least mostly axial direction.

Classes IPC  ?

• F16J 15/26 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par presse-étoupes pour bagues d'étanchéité rigides

Abrégé

In a device for scraping off a circumferential surface, wetted with a fluid, of a rod, whereto the device dimensionality is adapted, which is movable in an axial direction, comprising at least two scraper lamellas (23a, b) of equal shape which are mutually offset relative to each other in axial direction and having radial variability, and which, with a radial protrusion, are received on a common holder ring (21) which is provided with a respective radial inner open annular groove for each one of said lamellas (23a, b) and has likewise radial variability, and which, due to a spring arrangement associated with its radial outer surface, can be reduced in size in a radial direction, an optimal scraping effect of all scraper lamellas (23a, b) of a common holder ring (21) can be attained in that at least the rear lamella (23a) in the moving direction of the rod (11) is radially resiliently supported relative to the groove bottom of said lamella's annular groove.

Classes IPC  ?

• F16J 15/26 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par presse-étoupes pour bagues d'étanchéité rigides

Produits et services

Marine propellers; propellers for ships; screw-propellers; propeller shafts for ships; propeller feathering units. Development of software programs for the adaption of ship propellers; design of ship propellers; engineering consulting services concerning software for the adaption of ship propellers; engineering consulting services in the field of design of ship propellers.

Produits et services

(1) Marine propellers; propellers for ships; screw propellers; propeller shafts for ships; propeller feathering units (1) Development of software programs for the adapting of ship propellers; design of ship propellers; engineering consulting services concerning software for the adapting of ship propellers; engineering consulting services in the field of designing of ship propellers

Abrégé

The invention relates to an internal combustion engine, in particular a large two-stroke diesel engine, comprising at least one combustion chamber (2) delimited by a cylinder (1) and a piston (3) interacting with a crankshaft, said combustion chamber comprising at least one combustion gas outlet (20; 120; 320; 420), which is formed between a valve disk (8; 108; 308) of an exhaust valve (9; 109; 309) and an associated disk seat, and at least one charge air inlet (4). The exhaust valve (9; 109; 309) can be actuated between an open position and a closed position. The combustion gas outlet (20; 120; 320; 420) is connected to at least one outlet channel (11) and to at least one combustion gas draw-off duct (18; 118a, 118b; 318, 318a; 418, 418a), for example in order to recirculate part of the combustion gas generated during combustion to the charge air inlet (4). The invention further relates to an exhaust valve (9; 109; 309) and to a cylinder head for such an internal combustion engine. The invention is characterized by a throttle device (10; 110; 310) which is fastened to the exhaust valve (9; 109; 309) or integrally molded as part of the exhaust valve (9; 109; 309) and by means of which the combustion gas is drawn off in a predetermined way. The invention further relates to a method for producing an internal combustion engine, to a method for operating an internal combustion engine, and to a use for an internal combustion engine.

Classes IPC  ?

• F02M 25/07 - ajoutant des gaz d'échappement
• F01L 1/28 - Systèmes de distribution à soupapes, p. ex. à soupapes de levage caractérisés par des soupapes coaxialesSystèmes de distribution à soupapes, p. ex. à soupapes de levage caractérisés par des soupapes travaillant à la fois avec l'orifice d'admission et d'échappement
• F01L 3/20 - Forme ou structure des corps de soupape non couverts par un des sous-groupes précédents du présent groupe
• F01L 3/22 - Sièges de soupapes non couverts par un des sous-groupes précédents du présent groupeFixation des sièges de soupapes

Abrégé

In a part or component for machines, in particular large-scale machines, which consists of grey cast iron with graphite embedded in a basic microstructure, it is possible to achieve a high load-bearing capacity and also good machining properties and good tribological properties by virtue of the fact that finely lamellar troostite is formed as the matrix material, in which the graphite is incorporated in lamellar form, by controlled cooling according to a predefined temperature-time correlation with a normalizing process at 850-900°C, subsequent rapid cooling down to about 400°C and subsequent, relatively slow residual cooling.

Classes IPC  ?

• C22C 37/00 - Fontes alliées
• C21D 5/00 - Traitement thermique de la fonte

Abrégé

A two-stroke crosshead large Diesel engine, comprising at least one combustion chamber, which is enclosed on multiple sides by a cylinder, and by at least one upper side of at least one piston moving up and down in the cylinder, which form an outer wall for the combustion chamber. The combustion chamber on its outer wall presents a predetermined breaking point, which is suited to protect the Diesel engine against possible damages which might be caused by an undesirably high overpressure (py) of gases in the combustion chamber during a malfunction of the Diesel engine. The predetermined breaking point comprises a predetermined breaking pressure (ps) below the overpressure (py) above which damages are expected, and above a combustion chamber normal pressure (pn) provided at a maximum during normal engine operation conditions.

Classes IPC  ?

• F02B 77/08 - Dispositifs de sécurité, d'indication ou de surveillance
• F16K 17/14 - Soupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage ouvrant sur excès de pression d'un côtéSoupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage fermant sur insuffisance de pression d'un côté avec élément de rupture

Abrégé

The invention is directed to a pipe end sealing structure (1) comprising a first pipe element (2) having a cylindrical metal pipe body with a first annular end surface (12) at at least one open pipe end adapted to be a sealing support surface, a sealing (4) having a metal sealing body with a first sealing surface (13) facing towards first annular end surface (12) and being adapted to rest at least partially on the first annular end surface (12), a first flange (3) extending radially outwardly from an outer circumference of the first pipe element (2), urging means (7, 8, 9) adapted for urging the sealing (4) and the first flange (3) in an axial direction towards each other, so that the sealing (4) is urged with its first sealing surface (13) against the first annular end surface (12) of the first pipe element (1), wherein the first annular end surface (12) of the cylindrical metal pipe body is a tapered annular surface (12) and the first sealing surface (13) of the metal sealing body is a conical inner circumferential surface (13) facing towards and resting at least partially on the first tapered annular end surface (12) of the first pipe element (2). The invention is characterized in that the first flange (3) being fixed on the outer circumference of the first pipe element (2) at least against axial movement towards the open pipe end, the urging means (7, 8, 9) are adapted for urging the sealing (4) and the first flange (3) with such an urging force towards each other, that the connection of the sealing (4) and the first pipe element (1) is gas tight between the conical inner circumferential surface (13) and the tapered annular surface (12) for high pressure gases with a high pressure above 250 bar, and the metal pipe body and the metal sealing body have a rigidity sufficient to withstand this high pressure of the high pressure gas and to withstand an urging force of the urging means (7, 8, 9) sufficient to make the connection gas tight..

Classes IPC  ?

• F16L 23/028 - Raccords à brides les brides étant raccordées par des organes tendus axialement caractérisés par la façon dont les brides sont fixées ou forment une extension aux tuyaux les brides étant maintenues derrière un épaulement

Abrégé

A piston ring (6) which is arranged with radial and axial play in an associated piston ring groove (5) in a piston (1) of a reciprocating internal combustion engine can be stabilized to prevent tilting on and contact with the radially outer edge of the piston ring groove (5) by the cross section of the piston ring (6) and/or the piston ring groove (5) being designed in such a manner that a gap is formed between the lower side of the piston ring (6) and the lower supporting surface of the associated piston ring groove (5), said gap opening vertically radially outwards in the radial direction and, when the piston ring (6) is not subjected to a load, remaining open to the outside irrespective of the temperature of the piston (1) for as long as the piston ring (6) is not loaded by pressure on the top side. The effect achieved by this is that, when a piston (1) is deformed under the action of heat during operation, the initial contact between the lower side of the piston ring (6) and the opposite, lower supporting surface of the piston ring groove (5) begins at least in a region of the lower side of the piston ring (6), which region faces the piston axis, and rubbing of the piston ring (6) on the radially outer edge of the piston ring groove (5) is prevented.

Classes IPC  ?

• F02F 3/00 - Pistons
• F02F 5/00 - Segments de piston, p. ex. associés avec la tête de piston
• F16J 9/22 - Segments pour empêcher l'usure des gorges ou logements du même genre
• F16J 9/20 - Segments à section spécialeSegments racleurs d'huile

Abrégé

The invention relates to a valve assembly, comprising a valve (4) which is associated with a gas conduit (8), has a valve disc (6) and a valve stem (7) supporting said valve disc and is provided with a cooling device. In said valve assembly, a simple design, high functional reliability and a good energy balance can be achieved by using a gaseous cooling medium or a cooling medium which consists at least partially of components that can be converted into a gaseous state. The cooling medium is discharged as gas into a gas conduit (8) via at least one outlet chamber (17), and for this purpose each discharge duct (19) originating from the outlet chamber (17) opens into a gas conduit (8).

Classes IPC  ?

• F01L 3/12 - Refroidissement des soupapes
• F01L 3/16 - Refroidissement des soupapes par fluide s'écoulant à travers ou le long de la soupape, p. ex. de l'air
• F01L 3/18 - Refroidissement des soupapes par liquide

Abrégé

An exhaust valve spindle (1) for an internal combustion engine, particularly a two-stroke crosshead engine, which exhaust valve spindle comprises a valve head (3) with a base portion (4) of an alloyed steel, and an outer facing (5) forming the surface of the valve spindle towards a combustion chamber. The outer facing (5) has been formed from particulate starting material of a hot-corrosion-resistant alloy being nickel-based, chromium- based or cobalt-based, where said particulate starting material has been united to a coherent layer. At least at the transition zone to the base portion (4) the particles in the particulate material of the outer facing (5) have been deformed into oval or elongate shapes by shear strain caused by forging the outer facing and the base portion, and that the forged outer facing (5) has a density of at least 98.0 %.

Classes IPC  ?

• F01L 3/04 - Corps de soupapes ou sièges de soupapes ayant un revêtement
• B22F 3/17 - Fabrication de pièces ou d'objets à partir de poudres métalliques, caractérisée par le mode de compactage ou de frittageAppareils spécialement adaptés à cet effet par forgeage
• B21K 1/24 - Fabrication d'éléments de machines de parties de soupapes de corps de soupagesFabrication d'éléments de machines de parties de soupapes de sièges de soupapes

Abrégé

A nozzle for a fuel valve (1) for an internal combustion engine, particularly a two-stroke crosshead engine, which nozzle for a fuel valve comprises a valve head (3) with a core portion (4) of an alloyed steel, and an outer facing (5) forming the surface of the nozzle towards a combustion chamber. The outer facing (5) has been formed from particulate starting material of a hot-corrosion-resistant alloy being nickel-based, chromium-based or cobalt based, where said particulate starting material has been united to a coherent layer. At least at the transition zone to the core portion (4) the particles in the particulate material of the outer facing (5) have been deformed into oval or elongate shapes by shear strain caused by forging the outer facing and the core portion, and that the forged outer facing (5) has a density of at least 98.0 %.

Classes IPC  ?

• F02M 61/18 - Buses d'injection, p. ex. comportant des sièges de clapets
• B22F 3/17 - Fabrication de pièces ou d'objets à partir de poudres métalliques, caractérisée par le mode de compactage ou de frittageAppareils spécialement adaptés à cet effet par forgeage

Abrégé

x-emission of a large sized two stroke diesel engine having at least one combustion room (3), a reciprocating piston (4) and an exhaust opening (12) controlled by an exhaust valve (13) at each work cyclus a small volume of burnt gas is retained in the combustion room (3) and so added to the fresh air for the next combustion. For achieving this retention of burnt gas the underside of the valve disc (15) off the exhaust valve (13) is provided with a shallow concave face (17) building a basin-like collection room, whose depth is within a range of 2-10% of the outer diameter of the valve disc (15).

Classes IPC  ?

• F01N 3/00 - Silencieux ou dispositifs d'échappement comportant des moyens pour purifier, rendre inoffensifs ou traiter les gaz d'échappement
• B21K 1/22 - Fabrication d'éléments de machines de parties de soupapes de soupapes-champignon, p. ex. pour moteurs à combustion interne
• F01L 3/00 - Soupapes de levage, c.-à-d. dispositifs obturateurs dont l'élément de fermeture possède au moins une composante de mouvement d'ouverture ou de fermeture perpendiculaire à la surface d'obturationÉléments ou accessoires de ces soupapes
• F01L 3/02 - Emploi de matériaux spécifiques pour corps de soupapes ou leurs siègesCorps de soupapes ou sièges de soupapes composés de plusieurs matériaux différents
• F02B 47/08 - Mode de fonctionnement des moteurs comportant addition de substances non combustibles ou d'agents antidétonants à l'air comburant, au combustible ou au mélange d'air et de combustible les substances étant autres que l'eau ou la vapeur d'eau uniquement les substances comprenant les gaz d'échappement
• F02M 25/07 - ajoutant des gaz d'échappement
• F01L 3/06 - Corps ou sièges de soupapes ayant des dispositifs de guidage ou de déviation du fluide qu'ils contrôlent, p. ex. en donnant un mouvement de rotation à la charge aspirée dans le cylindre
• F02B 23/06 - Autres moteurs caractérisés par des chambres de combustion d'une forme ou d'une structure particulières pour améliorer le fonctionnement avec allumage par compression l'espace de combustion étant disposé dans le piston moteur

Produits et services

(1) Parts and fittings for motors and engines, turbochargers and exhaust gas turbines for ships and stationary plants; pumps as part of motors and engines for ships and stationary plants; cylinders for motors and engines; machines, namely, pulverisers, parts of machines, namely, feeders; hydraulic lubricating devices for motors and engines; lubricating pumps; parts of machines and engines, namely, pistons; parts of machines and engines, namely, cylinder lubricating device.

Abrégé

A steel or iron friction member (50) is provided with a predetermined exact thickness for creating high resistance to shear movement when said friction member (50) is squeezed between two mating metallic surfaces (30,32,44,46) of at least two machine parts (20,40) by at least two clamping devices (42) per friction element (50). For providing the squeeze force the friction member (50) is provided with at least one friction face (47) to mate with a mating face (30,32,44,46) of one of said machine parts, The method involves roughening said friction face (47) followed by non-depositing surface hardening the roughened friction face (47).

Classes IPC  ?

• F16B 2/00 - Attaches à serrage par friction largables
• C21D 1/09 - Durcissement de surface par application directe d'énergie électrique ou ondulatoireDurcissement de surface par radiation particulaire
• F16C 9/02 - Paliers de vilebrequin

Abrégé

A large two-stroke turbocharged diesel engine of the crosshead type provided with an exhaust gas recirculation system and with a fuel injection system that can, selectively add water to the fuel flow to thereby increase the mass flow through the injection nozzles under particular operating conditions, e.g. at high exhaust gas recirculation rates. The increased mass flow through the injection nozzles improves the entrainment of the fresh charge into the high-speed of the fuel spray and thereby increases the fuel/air mixing and brings the combustion towards the lean side and hence counteracts soot formation.

Classes IPC  ?

• F02M 25/03 - Appareils spécifiques conjugués aux moteurs pour ajouter des substances non combustibles ou de petites quantités de combustible secondaire, à l’air comburant, au combustible principal ou au mélange air-combustible ajoutant une émulsion d'eau et de combustible, de l'eau ou de la vapeur ajoutant de l'eau dans les cylindres
• F02D 21/08 - Commande des moteurs caractérisés par leur alimentation en oxygène non extrait de l'air ou autre gaz non combustible particulière aux moteurs pour lesquels d'autres gaz non combustibles sont ajoutés à l'air comburant l'autre gaz étant le gaz d'échappement du moteur
• F02D 41/00 - Commande électrique de l'alimentation en mélange combustible ou en ses constituants
• F02M 43/04 - Injecteurs particuliers à cet effet

Abrégé

In cleaning engine exhaust gas, a high cleaning degree can be achieved by supplying at least a part of the finely dispersed cleaning liquid to be supplied to the exhaust gas to an exhaust gas total flow not yet split into partial flows. In said process, the exhaust gas is first brought into contact with a finely dispersed cleaning liquid, and the volume flow, formed from the exhaust gas and the finely dispersed cleaning liquid, subsequently has to pass a bath of cleaning liquid provided in a container (1), said bath being divided into a lower and an upper compartment (19, 20) by a gas- and liquid-permeable baffle element (18), wherein the volume flow, formed by exhaust gas and finely dispersed cleaning liquid, is introduced into the area of the cleaning liquid bath located underneath the baffle element (18), and from here, runs through the area of the cleaning liquid bath located above the baffle element (18).

Classes IPC  ?

• F01N 3/04 - Silencieux ou dispositifs d'échappement comportant des moyens pour purifier, rendre inoffensifs ou traiter les gaz d'échappement pour refroidir ou pour enlever les constituants solides des gaz d'échappement au moyen de liquides
• F01N 3/037 - Silencieux ou dispositifs d'échappement comportant des moyens pour purifier, rendre inoffensifs ou traiter les gaz d'échappement pour refroidir ou pour enlever les constituants solides des gaz d'échappement au moyen de séparateurs inertiels ou centrifuges, p. ex. associés à des appareils de précipitation
• F02M 25/07 - ajoutant des gaz d'échappement
• B01D 47/02 - Séparation de particules dispersées dans l'air, des gaz ou des vapeurs en utilisant un liquide comme agent de séparation par passage de l'air, du gaz ou de la vapeur sur ou à travers un bain liquide
• B01D 47/06 - Nettoyage par pulvérisation
• B01D 47/10 - Épurateurs à Venturi
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide

Abrégé

When scrubbing engine exhaust gas, where at first admission of a dispersed scrubbing liquid into the exhaust gas occurs, and subsequently the volume flow formed from the exhaust gas and the dispersed scrubbing liquid is sent through a scrubbing liquid bath provided in a receptacle (1), which by a gas and liquid permeable retaining element (18) is divided into a lower and upper compartment (19, 20), with the volume flow formed by the exhaust gas and the dispersed scrubbing liquid being introduced into the area of scrubbing liquid bath located below the retaining element (18) and from here bubbling through the area of the scrubbing liquid bath located above the retaining element (18), a high degree of scrubbing can be achieved by the fact that at least part of the dispersed scrubbing liquid to be supplied to the exhaust gas is supplied to an overall exhaust gas flow not yet divided into partial flows.

Classes IPC  ?

• F01N 3/04 - Silencieux ou dispositifs d'échappement comportant des moyens pour purifier, rendre inoffensifs ou traiter les gaz d'échappement pour refroidir ou pour enlever les constituants solides des gaz d'échappement au moyen de liquides
• F02M 26/15 - Aménagement ou disposition des passages RGE, p. ex. par rapport à des pièces spécifiques du moteur ou pour l’incorporation d’accessoires par rapport au système d’échappement par rapport aux appareils de purification de l’échappement du moteur
• B01D 53/14 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• F01N 3/037 - Silencieux ou dispositifs d'échappement comportant des moyens pour purifier, rendre inoffensifs ou traiter les gaz d'échappement pour refroidir ou pour enlever les constituants solides des gaz d'échappement au moyen de séparateurs inertiels ou centrifuges, p. ex. associés à des appareils de précipitation

Abrégé

A movable wall member, in form of an exhaust valve spindle (1) or a piston (7) for an internal combustion engine, comprises a base portion (17, 20) of an alloyed steel having a carbon-content in the range from 0.15 to 0.35 % by weight, and an outer portion (14, 5) forming the surface of the wall member facing a combustion chamber. The outer portion is of a hot-corrosion-resistant alloy, which is nickel-based, chromium-based or cobalt-based. At least one buffer layer (18, 21) of an alloy is located in between the base portion and the outer portion. The alloy of the buffer layer is different from the alloyed steel of the base portion and different from the hot-corrosion-resistant alloy of the outer portion. The alloy of the buffer layer comprises from 0% to at the most 0.09% C in percent by weight of the buffer layer, and that the buffer layer has a thickness of at least 1.5 mm.

Classes IPC  ?

• F01L 3/04 - Corps de soupapes ou sièges de soupapes ayant un revêtement
• B22F 5/00 - Fabrication de pièces ou d'objets à partir de poudres métalliques caractérisée par la forme particulière du produit à réaliser
• C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
• F01L 3/22 - Sièges de soupapes non couverts par un des sous-groupes précédents du présent groupeFixation des sièges de soupapes
• F02F 3/12 - Pistons comportant des revêtements de surface sur les têtes de piston

Abrégé

The invention relates to a diesel engine, particularly a two-stroke crosshead large diesel engine, comprising at least one combustion chamber (1), which is enclosed by a cylinder on multiple sides and by at least one upper side of at least one piston moving up and down in the cylinder, which form an outer wall (3; 103) for the combustion chamber (1), wherein the combustion chamber (1) comprises a predetermined breaking point (12) on the outer wall (3; 103) thereof. The invention is characterized in that the predetermined breaking point (12) is suited to protect the diesel engine against possible damage that can be caused by an undesirably high overpressure (py) of gases in the combustion chamber (1) during a malfunction of the diesel engine, wherein the predetermined breaking point (12) has a breaking point pressure (ps) below the overpressure (py) above which damages can be expected, and above a combustion chamber normal pressure (pn) provided at a maximum during normal engine operation conditions. The invention further relates to a predetermined breaking point component and to a method, wherein in order to prevent the damage, at least one predetermined breaking point component of said kind is provided in the outer wall of at least one combustion chamber and/or the diesel engine is designed according to the invention.

Classes IPC  ?

• F02B 77/08 - Dispositifs de sécurité, d'indication ou de surveillance
• F02P 11/02 - Prévention des dommages aux moteurs ou aux transmissions de leur entraînement
• F16K 17/14 - Soupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage ouvrant sur excès de pression d'un côtéSoupapes ou clapets de sûretéSoupapes ou clapets d'équilibrage fermant sur insuffisance de pression d'un côté avec élément de rupture

Abrégé

The invention relates to a device for machining a contact surface of a bearing seat (5) of a round shaft (3), at least in segments, while the bearing is dismantled (4), having at least one rotatable cutting tool (1) in the gap between the bearing seat (5) and a bearing journal (3) supported therein created by dismantling the bearing (4), particularly of a shaft supported in a sleeve bearing having bearing shells (4), such as a crankshaft of a two-cycle large diesel engine. The device is characterized in that a mounting device (2) is provided for mounting the cutting tool (1) to the bearing journal (3), and is configured so that the bearing journal (3) acts as a rotating tool holder when machining the contact surface of the bearing seat (5), and the cutting tool (1) is guided along the contact surface of the bearing seat (5) in a purely rotary cutting motion, wherein the mounting device (2) is configured for mounting the cutting tool (1) such that it can be released without leaving traces or damage in a force-fit and/or adhesive bond, and comprises an adhesive layer and/or at least one hose clamp. A corresponding device for machining a contact surface of a bearing journal (3) of a round shaft (3) while the bearing (4) is dismantled is further proposed, and a method for machining the contact surface of the bearing seat or the bearing journal using such a device.

Classes IPC  ?

• B24B 5/42 - Machines ou appareils spécialisés pour une seule opération pour rectifier des vilebrequins ou des manetons de vilebrequins
• B23D 77/02 - Alésoirs avec arêtes de coupe rapportées

Abrégé

A large two-stroke diesel engine (1) with an exhaust valve actuating system including a camshaft (28) and hydraulic pushrods that include a piston pump (32) driven by the camshaft coupled via conduit (36) to a hydraulic exhaust valve actuator (34) for moving the exhaust valve (11) concerned. The camshaft is provided with an exhaust cam (29) for each cylinder, and the exhaust cam is profiled with an increased lift (30) exceeding the lift required for opening the exhaust valve. A portion of the additional volume of hydraulic fluid generated by the increased lift of the hydraulic piston pumps is diverted from the hydraulic push rod and delivered to a consumer of pressurized hydraulic fluid that is associated with the engine. The other portion of the additional volume of hydraulic fluid results in additional exhaust valve lift. The energy stored in the air spring (33) urging the exhaust valve to close is returned to the camshaft during the return stroke of the exhaust valve.

Classes IPC  ?

• F01L 9/02 - Systèmes de distribution à soupapes, à commande non mécanique à fluide, p.ex. hydraulique
• F01L 1/08 - Forme des cames
• F02M 47/04 - Appareils d'injection à fonctionnement périodique avec clapets d'injection actionnés par la pression du fluide utilisant un fluide, autre que le combustible, pour la commande des clapets d'injection
• F02M 59/10 - Pompes spécialement adaptées à l'injection de combustible non couvertes dans les groupes du type à piston alternatif caractérisées par l'entraînement du piston

Abrégé

A large two-stroke diesel engine (1) of the crosshead type includes a low to medium pressure hydraulic system, such as the engine lubrication system and a closed circuit high-pressure hydraulic system. The low to medium pressure hydraulic system is operated with a first level of purity. The closed circuit high-pressure hydraulic system is connected to the low to medium pressure hydraulic system by a feed conduit (14) that includes a filter (16) and a feed pump (18) so that the closed circuit high-pressure system operates with a higher level of purity than the low to medium pressure hydraulic system. The high-pressure hydraulic system is used to operate a plurality of hydraulic linear actuators (12) associated with each exhaust valve and/or a plurality of hydraulic driven fuel injection pressure boosters (11) provided for each cylinder.

Classes IPC  ?

• F01L 9/02 - Systèmes de distribution à soupapes, à commande non mécanique à fluide, p.ex. hydraulique
• F02M 47/04 - Appareils d'injection à fonctionnement périodique avec clapets d'injection actionnés par la pression du fluide utilisant un fluide, autre que le combustible, pour la commande des clapets d'injection

Abrégé

A piston ring (6) which is arranged with radial and axial play in an associated piston ring groove (5) in a piston (1) of a reciprocating internal combustion engine can be stabilized to prevent tilting on and contact with the radially outer edge of the piston ring groove (5) by the cross section of the piston ring (6) and/or the piston ring groove (5) being designed in such a manner that a gap is formed between the lower side of the piston ring (6) and the lower supporting surface of the associated piston ring groove (5), said gap opening vertically radially outwards in the radial direction and, when the piston ring (6) is not subjected to a load, remaining open to the outside irrespective of the temperature of the piston (1) for as long as the piston ring (6) is not loaded by pressure on the top side. The effect achieved by this is that, when a piston (1) is deformed under the action of heat during operation, the initial contact between the lower side of the piston ring (6) and the opposite, lower supporting surface of the piston ring groove (5) begins at least in a region of the lower side of the piston ring (6), which region faces the piston axis, and rubbing of the piston ring (6) on the radially outer edge of the piston ring groove (5) is prevented.

Classes IPC  ?

• F16J 9/20 - Segments à section spécialeSegments racleurs d'huile
• F16J 9/22 - Segments pour empêcher l'usure des gorges ou logements du même genre

Abrégé

For reducing the Nox-emission of a large sized two stroke diesel engine having at least one combustion room (3), a reciprocating piston (4) and an exhaust opening (12) controlled by an exhaust valve (13) at each work cyclus a small volume of burnt gas is retained in the combustion room (3) and so added to the fresh air for the next combustion. For achieving this retention of burnt gas the underside of the valve disc (15) off the exhaust valve (13) is provided with a shallow concave face (17) building a basin-like collection room, whose depth is within a range of 2-10 % of the outer diameter of the valve disc (15).

Classes IPC  ?

• F01L 3/20 - Forme ou structure des corps de soupape non couverts par un des sous-groupes précédents du présent groupe

Abrégé

A method for detection of pre-scuffing events in a large multicylinder two-stroke diesel engine by recognizing the characteristic temperature fluctuations of pre-scuffing events. The temperature fluctuations are characterized by the time span between their peaks and the magnitude of the fluctuations. Automatic countermeasures may be initiated after detection of the pre-scuffing event. The countermeasures may automatically be ended.

Classes IPC  ?

• F02B 77/08 - Dispositifs de sécurité, d'indication ou de surveillance
• F02D 35/02 - Commande non électrique des moteurs en fonction des conditions extérieures ou intérieures aux moteurs, non prévue ailleurs des conditions intérieures
• F02D 41/22 - Dispositifs de sécurité ou d'avertissement en cas de conditions anormales

Abrégé

A method for detection of pre-scuffing events in a large multicylinder two-stroke diesel engine by recognizing a deviation between the temperature or temperature development of a cylinder relative to the average temperature or average temperature development of the other cylinders. Automatic countermeasures may be initiated after detection of the pre-scuffing event. The countermeasures may automatically be ended.

Classes IPC  ?

• F02B 77/08 - Dispositifs de sécurité, d'indication ou de surveillance

Abrégé

A fuel injector for an internal combustion engine comprises at least a housing, a valve seat (21), a valve spindle (16), an atomizer (5), and a cut-off element (27). The atomizer has a central bore (22) from which a plurality of nozzle bores (31) extend through a sidewall of the atomizer. The cut-off element is carried by a shaft on the valve spindle and comprises a first cylindrical section (28) located in the central bore of the atomizer to close fuel access to inlet openings of a first group of nozzle bores, when the valve spindle is in the closed position. When the valve spindle is in the open position, fuel is supplied to at least a second group of nozzle bores through a passage between the circumference of the cut-off element and the central bore of the atomizer. The cut-off element has a second cylindrical section (29) for closing off inlet openings of the second group of nozzle bores when the valve spindle is in the closed position.

Classes IPC  ?

• F02M 53/04 - Injecteurs avec moyens de chauffage, de refroidissement ou d'isolation thermique
• F02M 61/04 - Injecteurs de combustible non couverts dans les groupes ou comportant des clapets
• F02M 61/18 - Buses d'injection, p. ex. comportant des sièges de clapets

Produits et services

Machines and machine tools; motors and engines; accessories and spare parts for motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); agricultural implements other than hand-operated; incubators for eggs. Information regarding repair, installation and repair of motors, engines, machines and electric appliances; reconstruction of deteriorated or partially damaged machines and motors and engines; installation, maintenance and repair of machines, motors and engines.

Produits et services

Exhaust valves for internal combustion engines.

Produits et services

Exhaust valves for internal combustion engines