Abrégé

A piston assembly for internal combustion diesel engine having a piston diameter of 160-650 mm, the piston assembly including a top part, a body part and a gudgeon pin connectable to each other, the top part defining, when installed in a cylinder, the piston side of a combustion chamber, and the body part having an aperture for a gudgeon pin, bosses for distributing forces between the piston and the gudgeon pin, the body part having an interior, an outer surface and operable connecting surfaces, the gudgeon pin for pivotally connecting the piston to a connecting rod, is configured to be assembled and lockable by locking elements to the body part aperture in a given rotational orientation such that there is provided a conduit for supplying cooling oil from the connecting rod via the gudgeon pin to the bosses and to a cooling gallery between the top and body parts.

Classes IPC  ?

• F02F 3/00 - Pistons
• F02F 3/22 - Pistons comportant des moyens de refroidissement les moyens consistant en un fluide circulant dans ou le long du piston le fluide étant un liquide
• F16J 1/16 - Liaison avec les organes d'entraînement avec les bielles, c.-à-d. liaisons articulées à pivotement avec les axes de pistonAxes de piston
• F16J 1/18 - Blocage des axes de piston
• F01P 3/10 - Refroidissement par circulation d'agents de refroidissement dans les pistons

Abrégé

A piston for internal combustion diesel engine having a piston diameter of 180 to 650 mm, includes a top part and a body part connectable to each other, the top part defining, when installed in a cylinder of the engine, the piston side of a combustion chamber, and the body part having an aperture for a gudgeon pin, bosses for distributing forces, when in use, between the piston and the gudgeon pin, the body part having an interior, an outer surface and operable connecting surfaces. The interior of the body part includes an interior wall having a macro geometry of wavy surface, where a wave has a length of 3 to 25 mm and a height of 0.3 to 3 mm, the wavy surface having a micro geometry measurable as a surface roughness of 5 to 9 μm.

Classes IPC  ?

• F02F 3/00 - Pistons
• B23P 15/10 - Fabrication d'objets déterminés par des opérations non couvertes par une seule autre sous-classe ou un groupe de la présente sous-classe de pistons
• B21K 1/44 - Fabrication d'éléments de machines de boulons, goujons ou éléments similaires

Abrégé

A piston (1) assembly for an internal combustion diesel engine having a piston diameter (D) of 160 to 650 mm, the piston (1) assembly comprising a top part (2) and a body part (3) and a cooling gallery (23) arranged between the top part (2) and the body part (3), - the top part (2) defining, when installed in a cylinder (C) of the engine, the piston (1) side of a combustion chamber, and - the body part (3) having an aperture (30) for a gudgeon pin (4), bosses (32) for distributing forces, when in use, between the piston (1) and the gudgeon pin (4), the body part (3) having an interior (33), an outer surface (34) comprising indentations (340) defined by the outer surfaces (34) of the bosses (32) and an imaginary boundary of the cylinder (C) of the engine, and - the cooling gallery (23) is arranged as a hollow space between the top part (2) and the body part (3) wherein an amount of piston cooling fluid can be led to remove the superfluous heat from the piston assembly (1), and - the interior side of the top part (2) is arranged to form an inner cooling surface (25) for piston cooling fluid to flow along and cool the central area of the top part (2), - the body part is provided with a conduit (37) for said cooling fluid, said conduit (37) is extending between the indentation (340) and the cooling gallery (23).

Classes IPC  ?

• F02F 3/22 - Pistons comportant des moyens de refroidissement les moyens consistant en un fluide circulant dans ou le long du piston le fluide étant un liquide
• F01P 3/10 - Refroidissement par circulation d'agents de refroidissement dans les pistons

Abrégé

A piston (1) assembly for internal combustion diesel engine having a piston diameter (D) of 160 to 650 mm, the piston (1) assembly comprising a top part (2) and a body part (3) and a gudgeon pin (4) connectable to each other, - the top part (2) defining, when installed in a cylinder of the engine, the piston (1) side of a combustion chamber, and - the body part (3) having an aperture (30) for a gudgeon pin (4), bosses (32) for distributing forces, when in use, between the piston (1) and the gudgeon pin (4), the body part (3) having an interior (33), an outer surface (34) and operable connecting surfaces (35), - the gudgeon pin (4) for connecting the piston (1) to a connecting rod 5 of the engine in a pivotal manner, - the gudgeon pin (4) is configured to be assembled and lockable by locking means (6) to the aperture (30) of the body part (3) in a given rotational orientation such that there is provided a conduit (57, 47, 37) for supplying cooling oil from the connecting rod (5) via the gudgeon pin (4) to the bosses (32) and further to a cooling gallery (23) between the top part (2) and the body part (3), said conduit (47) is formed through the gudgeon pin (4) as a cross sectionally closed conduit (47).

Classes IPC  ?

• F02F 3/22 - Pistons comportant des moyens de refroidissement les moyens consistant en un fluide circulant dans ou le long du piston le fluide étant un liquide

Abrégé

A piston (1) for internal combustion diesel engine having a piston diameter (D) of 180 to 650 mm, the piston (1) comprising a top part (2) and a body part (3) connectable to each others, - the top part (2) defining, when installed in a cylinder of the engine, the piston (1) side of a combustion chamber, and - the body part (3) having an aperture (30) for a gudgeon pin (4), bosses (32) for distributing forces, when in use, between the piston (1) and the gudgeon pin (4), the body part (3) having an interior (33), an outer surface (34) and operable connecting surfaces (35). The interior (33) of the body part (3) comprises an interior wall (or surface) (330) having a macro geometry of wavy (331) surface, where a length (L) of a wave (331) is 3 to 25 mm and a height (h) of a wave (331) is 0,3 to 3 mm, the wavy surface having a micro geometry measurable as a surface roughness of 5 to 9 μm.

Classes IPC  ?

• F02F 3/00 - Pistons