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piston

A technology for pistons and piston heads, which is applied in the direction of pistons, engine components, machines/engines, etc., can solve problems such as size restrictions, and achieve improved cooling effects

Inactive Publication Date: 2018-07-31
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage here is that the described arrangement of the cooling channels constitutes a size limitation of the piston bowl on the piston crown

Method used

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Embodiment Construction

[0022] figure 1A piston 1 is shown, which is produced by means of casting. Here, the casting mold 2 of the piston 1 is indicated by means of a solid line, whereas the finished product 3 of the piston 1 is indicated by a dashed line. To complete the finished product 3, the casting mold 2 is produced, for example, by the rotary method or by milling. The piston 1 additionally has an annular carrier 4 and a cooling channel 5 which is previously forged or welded as an insert part 6 and thus inserted into a corresponding mold before the piston 1 is cast and subsequently formed from the material forming the piston 1 (in particular aluminum) Surround casting. Here, the ring carrier 4 is preferably produced from a corrosion-resistant nickel alloy, and the cooling channel 5 is preferably produced from austenitic steel / sheet metal.

[0023] Piston 1 additionally comprises a piston head 7 and an annular part 8 formed around the circumference of piston head 7 . Formed in the ring part ...

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Abstract

A piston for an internal combustion engine may include a piston head and a piston skirt. The piston head may include a circumferential ring part. In a region of the ring part, the piston head may include a circumferential cooling channel and a circumferential ring support. The ring support may define a wall section of the cooling channel and thereby be directly in contact with the cooling channel. The cooling channel may have a cross-section that may define a contraction disposed in a central area.

Description

technical field [0001] The present invention relates to a piston for an internal combustion engine, which piston includes a piston head and a piston skirt, and according to the technical content "the piston for an internal combustion engine includes: a piston head and a piston skirt, wherein the piston head has a circumferential ring part, and in the The annular part area has a circumferential cooling channel and a circumferential annular support which forms part of the wall of the cooling channel and is thus in direct contact with the cooling channel, wherein the cooling channel has a transverse constriction in the central region Cross-section, the cooling channel cover of the cooling channel is dome-shaped or cylindrical; the cross-section of the cooling channel includes in the axial direction: height H 1 , the first maximum radial width B of the region arranged on the constricted side facing the piston crown 1 , the second maximum radial width B of the region arranged on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F3/22
Inventor 乌尔里希·比朔夫贝格尔
Owner MAHLE INT GMBH