Assembled piston for an internal combustion engine

A technology of internal combustion engine and piston, which is applied in the field of internal combustion engine piston assembly, which can solve the problems of large piston compression height, blind hole space and screw head space, and achieve the effect of improving strength

Inactive Publication Date: 2009-07-08
MAHLE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has the disadvantage that the space requirements of the blind hole and of the screw head are relatively large, so that the compressed height of the piston is also relatively large, so that the entire piston has a considerable axial overall length

Method used

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  • Assembled piston for an internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] The figures show the assembled piston 1 in a cross-sectional view, the left half of which represents a cross-section of the piston 1 along the longitudinal axis 2 of the piston pin housing bore 3, while the right half represents a cross-section with the left half A 90-degree cross-sectional view of the piston. The piston 1 consists of an upper part 4 and a lower part 5, which are connected to each other by means of a concentrically arranged threaded pin 6 comprising a hexagon socket 6' and a flat head 6" on the side facing away from the hexagon socket, The connection of the upper part and the lower part is such that the head 6' of the threaded pin 6 is located inside the piston. Here, the head 6" of the threaded pin 6 has a larger radial diameter than the external thread 38. Between the head 6 ″ and the external thread 38 the threaded pin 6 has an expansion region 39 with a smaller radial diameter than the external thread 38 .

[0050] The upper part 4 and the lower pa...

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Abstract

The invention provides an internal combustion engine assembly piston (1), which is composed of an upper part (4) with a combustion chamber (8) and a lower part (5) screwed to the upper part by a screw (6), the screw (6) The axis is collinear with the piston axis (31). The screw (6) is formed as a threaded pin comprising a hexagon socket (6') on the inner side of the piston and a head (6") on the top side of the piston, wherein the head (6") constitutes A part of the bottom of the combustion chamber (8) and is flush with the bottom of the combustion chamber (8) in a tightened state.

Description

technical field [0001] The invention relates to an assembled piston of an internal combustion engine, the piston comprising an upper part constituting a piston crown and having a combustion chamber, the upper part having an annular recess arranged on the underside facing away from the piston crown and rotationally symmetrical with respect to the longitudinal axis of the piston; Furthermore, the piston has a lower part, which is screwed together with the upper part by means of a screw arranged coaxially with the piston axis, and which comprises two piston pins arranged at a distance from each other on the underside and each having a piston pin seat bore A seat, a piston skirt element connecting the piston pin seats to each other, and an annular recess arranged on the upper side and rotationally symmetrical with respect to the longitudinal axis of the piston, which together with the upper recess form an internal cooling channel. Background technique [0002] The assembled pist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F3/00F02F3/22
CPCF02F3/0023F02F3/22F02F3/00F02F3/16F16J1/00
Inventor 赖纳·沙普
Owner MAHLE GMBH
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