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Piston for an internal combustion engine and covering ring for the cooling duct of a piston of said type

一种冷却通道、内燃机的技术，应用在活塞环、活塞、机械设备等方向，能够解决昂贵、装配困难、不受欢迎等问题，达到冷却简单、装配简单、结构简化的效果

Inactive Publication Date: 2008-08-06
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the construction of the cover ring with additional grooves or the piston with additional projections is expensive and therefore undesirable
Furthermore, assembly becomes difficult, since the two half-shells have to be placed on the projections provided on the piston in a targeted manner

Method used

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  • Piston for an internal combustion engine and covering ring for the cooling duct of a piston of said type
  • Piston for an internal combustion engine and covering ring for the cooling duct of a piston of said type
  • Piston for an internal combustion engine and covering ring for the cooling duct of a piston of said type

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] 1, 2 and 4 show a single-piece internal combustion engine piston 10 . The piston 10 is made of steel

[0020] It is formed and has a piston head 11 and a piston skirt 12, which are integrally connected to each other by means of a piston skirt connection 13. The piston head 11 has a piston crown 14 and a combustion chamber 15 . In the radially outer region of the piston head 11 there is an annular surrounding cooling channel 16 whose radially outer boundary is formed by a ring wall 17 formed on the piston crown 14 and whose radially inner boundary It is composed of ring ribs 18 . In this case, the ring wall 17 serves as a piston ring carrier and terminates in a horizontal end face 19 facing the piston skirt 12 .

[0021] Formed on the piston head 11 are two pin seats 20, 20', which comprise two aligned pin seat holes 21, 21'. The end faces of the piston pin seats 20, 20' are set back relative to the ring wall 17 in the direction of the longitudinal axis of the piston...

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PUM

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Abstract

The invention relates to a one-piece internal combustion engine piston (10) comprising a piston head (11) and a piston skirt (12) spaced from the piston head by an annular recess (25), the piston skirt has at least one piston pin seat bore (21, 21') for accommodating a piston pin (23), wherein an annular surrounding cooling channel (16) for coolant is provided in the piston head (11), which The cooling channel is closed with a cover ring (30) consisting of at least two segments (30a, 30b). According to the invention, it is provided that at least one region of the cover ring (30) protrudes at least partially into the clear bore of the at least one piston pin seat bore (21, 21'), so that the cover ring (30) simultaneously forms the piston The safety element of the pin (23). In addition, such a cover ring (30) is also the content of the present invention.

Description

technical field [0001] The invention relates to a one-piece internal combustion engine piston comprising a piston head and a piston skirt spaced from the piston head by an annular recess, the piston skirt having at least one piston pin for receiving a piston pin The housing bore, wherein an annularly surrounding cooling channel for the coolant is provided in the piston head, the cooling channel being closed with a cover ring consisting of at least two segments. Furthermore, the invention relates to a cover ring composed of two or more segments for an annularly surrounding cooling channel of a piston of a one-piece internal combustion engine. Background technique [0002] DE 103 46 822 A1 discloses a piston of this type and a cover ring of this type. The piston has an annular cooling channel which is closed on the skirt side by a cover ring consisting of two semicircular half shells. The cover ring is provided with inwardly directed grooves, through which, for assembly, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/22
CPCF02F3/22F02F3/16F02F5/00
Inventor 罗尔夫-格哈德·菲德勒赖纳·沙普汉斯-彼得·威兰
Owner MAHLE INT GMBH
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