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Pistons for internal combustion engines

An internal combustion engine and piston technology, which is applied in the field of pistons for internal combustion engines, can solve problems such as loss of function, and achieve the effects of prolonging service life and reducing loss.

Inactive Publication Date: 2016-10-19
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, this lubricant loses its effect after a certain period of time, since the existing loads gradually wear away the coating during the operation of the internal combustion engine

Method used

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  • Pistons for internal combustion engines
  • Pistons for internal combustion engines
  • Pistons for internal combustion engines

Examples

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Embodiment Construction

[0019] figure 1 with 2 An embodiment of a piston 10 according to the invention is shown. The piston 10 can be a one-piece or multi-part piston, for example a combined piston or a hinged piston. Piston 10 can be made of steel and / or light metal material. figure 1 with 2 A one-piece piston 10 is shown as an example. The piston 10 has: a piston head 11 with a piston crown 12; a surrounding land 13 and an annular portion 14 for receiving piston rings (not shown). The piston 10 also has a piston skirt 15 with friction surfaces 16 , 17 . The piston skirt 15 is delimited by a lower skirt 18 . The friction surface 16 corresponds to the pressure side DS of the piston 10 (compared to figure 1 ), and the friction surface 17 corresponds to the back pressure side GDS of the piston 10 (contrast figure 2 ). Other known structures of the piston skirt, such as hubs and hub bores, are not shown for clarity of illustration. The properties and load distribution of the pressure side and...

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PUM

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Abstract

The invention relates to a piston (10) for an internal combustion engine having a piston head (11) and a piston skirt (15) defined by a lower skirt (18), wherein the piston skirt (15) has a The friction surface (16) of the side (DS) and the friction surface (17) corresponding to the back pressure side (GDS) of the device, and a section (21, 21') is subordinate to these two friction surfaces (16, 17 ), which section extends from the lower skirt ( 18 ) and is subjected to the greatest load during operation of the internal combustion engine. It is provided according to the invention that the section ( 21 ) of the friction surface ( 16 ) corresponding to the pressure side (DS) and / or the section ( 21 ′) of the friction surface ( 17 ) of the back pressure side (GDS) is arranged There is a coating (23, 23') which has vertically running grooves (24, 24').

Description

technical field [0001] The invention relates to a piston for an internal combustion engine, the piston having a piston head and a piston skirt defined by a lower skirt, wherein the piston skirt has a friction surface corresponding to its pressure side and a friction surface corresponding to its back pressure side, The two friction surfaces are each associated with a section which extends from the lower skirt and which is subjected to the greatest load during operation of the internal combustion engine. Background technique [0002] A generic piston is already known from DE 198 29 349 A1. Lubricant is applied to both the pressure side area and the back pressure side area of ​​the piston. This makes it possible to lubricate the areas of the friction surfaces of the piston which are particularly loaded due to transverse forces which are caused by the deflection of the connecting rod during operation. [0003] However, such lubricants lose their effectiveness after a certain p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F3/10F16J1/08
CPCF02F3/10F05C2251/14F16J1/08
Inventor 罗尔夫-格哈德·菲德勒
Owner MAHLE INT GMBH
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