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Cylinder liner and structural unit consisting of at least one cylinder liner and crankcase

A combined component and cylinder liner technology, applied in the field of cylinder liners, can solve problems such as uneven structure, damage, and damage to cylinder liner materials, and achieve the effect of optimizing protection and reducing damage

Inactive Publication Date: 2014-02-26
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

where the extreme maximum pressures and temperatures typical in cavitation lead to damage to the cylinder liner material, especially on the outer flanks
This danger arises in particular if the cylinder liner is made of cast iron material, which has a relatively inhomogeneous structure due to the presence of graphite inclusions (spheroidal or flake graphite)

Method used

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  • Cylinder liner and structural unit consisting of at least one cylinder liner and crankcase
  • Cylinder liner and structural unit consisting of at least one cylinder liner and crankcase
  • Cylinder liner and structural unit consisting of at least one cylinder liner and crankcase

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Embodiment Construction

[0016] figure 1 A first embodiment of a cylinder liner 30 according to the invention is shown. In this exemplary embodiment, the cylinder liner 30 is conventionally made of cast iron material and can be produced, for example, by centrifugal casting. In this exemplary embodiment, the cylinder liner 30 has a cylinder body 31 with an annular flange 32 . An annular chamfer 33 is provided in the cylinder 31 below the flange 32 . According to the invention a sleeve 35 encloses the outer side 34 of the cylinder 31 , which sleeve is made of steel in this exemplary embodiment. In this exemplary embodiment, after final machining of the cylinder liner 30 , the sleeve 35 is pushed onto the cylinder body 31 and secured in a conventional manner by means of a shrink fit.

[0017] figure 2 A first embodiment of a cylinder liner 130 according to the invention is shown. In this exemplary embodiment, the cylinder liner 130 is likewise made of cast iron material. In this exemplary embodime...

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PUM

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Abstract

The invention relates to a cylinder liner (30, 130) for a cylinder crankcase (11, 12; 111, 112) of an internal combustion engine, characterized in that at least a portion of the outer peripheral surface (34, 134) of the cylinder liner (30, 130) is surrounded by a sleeve (35, 235) that is produced of a metal material. The present invention further relates to a structural unit (10, 110) that consists of at least one such cylinder liner (30, 130) and a cylinder crankcase (11, 12; 111, 112).

Description

technical field [0001] The invention relates to a cylinder liner for a cylinder block crankcase of an internal combustion engine. The invention also relates to a composite part for an internal combustion engine consisting of at least one cylinder liner and a cylinder block crankcase, the composite part comprising at least one coolant chamber corresponding to the at least one cylinder liner. Background technique [0002] In internal combustion engines a distinction is made between "wet" and "dry" cylinder liners. The coolant chamber is incorporated in the cylinder block crankcase and formed between the cylinder block crankcase and the cylinder liner in the wet cylinder liner. This creates the danger that cavitation in the coolant can damage the cylinder liners which are in direct contact with the coolant. This cavitation is caused, for example, by dithering generated by the gas pressure in the combustion chamber and by shock pulses during the piston-side movement. In parti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F1/12F02F1/00
CPCF02F1/004F02F1/12F02F1/00
Inventor 沃尔夫冈·伊斯勒
Owner MAHLE INT GMBH