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Piston for an internal combustion engine

An internal combustion engine and piston technology, applied in the field of internal combustion engines, can solve problems such as skirt wall damage, achieve the effects of uniformly coordinating stress distribution and reducing the risk of cracks

Active Publication Date: 2010-03-10
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Pistons of this type often have the problem that, during operation, the stresses generated in the area of ​​the pin hub and in the area where the box wall connects to the underside of the piston crown are so great that it is possible to Cracks on the underside of the piston crown, which in extreme cases can extend through the entire piston crown and can also damage the skirt wall

Method used

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  • Piston for an internal combustion engine
  • Piston for an internal combustion engine
  • Piston for an internal combustion engine

Examples

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Embodiment Construction

[0025] figure 1 with 2 An embodiment of the inventive piston 10 is shown, which is preferably suitable for use in a four-stroke engine. The piston 10 is provided in a known manner with a piston crown 11 , with an annular land 12 and with an annular piston ring region 13 ; the piston crown is provided with a crown recess 11 a ;

[0026] The piston 10 is also provided with a piston skirt 15 which is connected to the underside 11 b of the piston crown 11 . The piston skirt 15 in turn has skirt walls 16, 17 arranged on the pressure side (DS) and back pressure side (GDS) of the piston 10, and the piston skirt is also provided with two box walls ( ) 18, 19, which One box wall is recessed facing the piston ring area 13 and connected to the skirt walls 16,17. The peripheral surface of each skirt wall 16 , 17 is represented as a working surface of the piston skirt 15 . Each box wall 18 , 19 is provided with a pin hub 21 provided with a hub hole 22 . Each housing wall 18 , 19 is th...

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PUM

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Abstract

The present invention relates to a piston (10) for an internal combustion engine, comprising a piston head (11), a peripheral fire land (12), and a peripheral ring section (13) comprising ring grooves(14), and a piston skirt (15) comprising two skirt walls (16, 17) on the pressure side (DS) and the counterpressure side (GDS) of the piston (10) and two box walls (18, 19) recessed relative to the ring section and connecting the skirt walls (18, 19), wherein the box walls (18, 19) have pin hubs (21) comprising hub bore holes (22). According to the invention, the skirt wall (16) located on the pressure side (DS) is shorter in the circumferential direction of the piston (10) than the skirt wall (17) located on the counterpressure side (GDS).

Description

technical field [0001] The invention relates to a piston used in an internal combustion engine. The piston includes a piston top, a fire land and a piston ring area, and the piston ring area is provided with an annular groove; the piston also includes a piston skirt, and the piston skirt has two A skirt wall arranged on the pressure side and the back pressure side of the piston, and the piston skirt also has two box walls recessed facing the piston ring area and connected to the skirt wall, wherein the The box wall is provided with a pin hub, and the pin hub is provided with a hub hole. Background technique [0002] MAHLE discloses a piston called "Ecoform". Pistons of this construction are also referred to as "box pistons". In a typical box piston, the two side walls of the piston skirt are recessed relative to the outer structure of the piston. The slightly long side wall which is sunken is called "box wall"; the other two slightly long side walls which are not sunken a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/02F16J1/04
CPCF02F3/027F02F3/00F02F3/02F16J1/04
Inventor 拉尔夫·布赖格赖纳·菲舍尔彼得·克姆尼茨彼得·克莱因勒
Owner MAHLE INT GMBH
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