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Piston for an internal combustion engine

A technology for internal combustion engines and pistons, applied in the field of internal combustion engine pistons, to achieve the effect of reducing friction

Inactive Publication Date: 2013-11-20
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In modern internal combustion engines it is difficult to ensure an optimal lubricant supply to the working surfaces

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

Experimental program
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Effect test

Embodiment Construction

[0028] figure 1 and 2 A first embodiment of a piston 10 according to the invention is shown. Piston 10 may be a one-piece piston or a piston consisting of several parts. Piston 10 can be made of steel and / or light metal material. figure 1 and 2 A one-piece box piston 10 is shown as an example. The piston 10 has a piston head 11 with a piston crown 12 , a surrounding crown land 14 and a piston ring section 15 for receiving piston rings (not shown), the piston crown having a crown recess 13 . A circumferential cooling channel 16 is provided at the level of the piston ring part 15 . Furthermore, the piston 10 has a piston skirt 17 with a pin hub 18 and a hub bore 19 for receiving a piston pin (not shown). The pin boss 18 is connected to the underside 11 a of the piston head 11 via a pin boss connection 21 . The pin hubs 17 are connected to each other via working faces 22 , 23 . In this case the working surface 22 corresponds to the pressure side DS of the piston 10 and th...

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Abstract

A piston for an internal combustion engine has a piston head with a circumferential ring belt and a circumferential cooling channel in the region of the ring belt, and a piston skirt having a working surface assigned to each of its major thrust side (DS) and its minor thrust side (GDS). At least one bore that proceeds from the cooling channel is provided. The bore ends in the working surface assigned to the minor thrust side (GDS), in the form of a bore opening, and is disposed at an incline, in such a manner that it encloses an acute angle (α) with the center axis (M) of the piston. The working surface assigned to the minor thrust side has a depression in the region of the bore opening.

Description

technical field [0001] The invention relates to a piston for an internal combustion engine with a piston head and a piston skirt, wherein the piston head has a circumferential piston ring and a circumferential cooling channel in the region of the piston ring, the piston skirt has a pressure side with it and a skirt with it. The working surface corresponding to the pressure side. Background technique [0002] In modern internal combustion engines it is very difficult to ensure an optimal lubricant supply to the working surfaces. This is not only related to the upward stroke but also to the downward stroke. During the upward stroke, the working surface corresponding to the back pressure side of the piston is in close contact with the corresponding cylinder working surface. The working surface rests against the corresponding cylinder working surface. During the upward stroke, the piston moves in an area where little or no oil is normally supplied, since the oil wiper ring con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J1/08F01M1/06
CPCF16J1/08F02F3/22
Inventor 赖纳·沙普
Owner MAHLE INT GMBH
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