Piston pin bearing for pistons of an internal combustion engine

A technology of piston pin and piston pin seat, which is applied to the direction of piston, cylindrical piston, plunger, etc., and can solve problems such as unsatisfactory results

Inactive Publication Date: 2008-12-24
MAHLE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Practice has shown that although the above design reduces the bending of the piston around the piston pin axis to a certain extent, the effect is not satisfactory

Method used

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  • Piston pin bearing for pistons of an internal combustion engine
  • Piston pin bearing for pistons of an internal combustion engine
  • Piston pin bearing for pistons of an internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0033] Such as figure 1 As shown, a piston 1 for an internal combustion engine has a pin housing 2 comprising an upper pin housing area 2.1 and a lower piston housing area 2.2, in which a cylindrical piston is supported pin (not shown). At the radially outer end of the piston pin housing on the side close to the piston, a piston pin retaining ring groove 8 and an oil groove 9 are provided, wherein the oil groove can surround or partially surround the circumferential side of the piston pin housing. according to figure 1 and figure 2 , the upper piston pin seat area is arranged on the gas pressure side, in which the surface 5 of the piston pin seat hole 2 is along the piston pin seat axis on the circumferential side, at the piston pin seat equator-piston pin seat apex-piston In the equatorial region of the pin socket, it is highly elliptical in the partial region 2.3 and cylindrical in the partial region 2.4. In particular, there are oil grooves, oil pockets, slots and oil ...

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PUM

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Abstract

The invention relates to a piston pin bearing for a piston of an internal combustion engine, in which a cylindrical piston pin (8) is mounted. The object of the present invention is to provide an improved shape of the piston pin seat hole compared to the prior art, so as to significantly reduce the mechanical stress on the piston, thereby prolonging the service life of the piston, while at the same time avoiding the occurrence of noise. The present invention achieves the above object in such a way that the generatrix (3) of the highly elliptical surface extending on the apex of the piston pin seat is directed at the piston pin seat axis ( x) extends obliquely such that a maximum ovality defined by the diameter of the ellipse occurs at the respective inner ends of the piston pin housing bores (2) and does not exceed a predetermined value of the ellipse diameter.

Description

technical field [0001] The invention relates to a piston pin bearing for a piston of an internal combustion engine with a piston pin seat bore, in which a piston pin is supported. Background technique [0002] With regard to the design of piston pin bores suitable for loads and deformations in internal combustion engine pistons, it is known, for example, from DE 21 52 462 B2, DE 41 41 279 A1 and DE 30 36 062 C2. The shape of the piston pin seat described there is based on the general knowledge that the gas pressure acting on the top of the piston is transmitted to the piston pin via the piston pin seat, so that the piston pin periodically rotates due to its rotation in the connecting rod Sexually bent. According to common assumptions, the piston pin housing is therefore subjected to tensile, compressive and bending stresses both in the horizontal plane and in the vertical plane, in particular at the top and bottom points of the piston pin housing. In order to accommodate t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J1/16F02F3/00F02B77/13
CPCF16J1/16F02F3/00
Inventor 沃尔夫冈·伊斯勒京特·楚格施韦特
Owner MAHLE GMBH
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