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Slide member and method for producing the slide member

a technology of slide member and slide member, which is applied in the direction of valve arrangement, machine/engine, mechanical apparatus, etc., can solve the problems of unsatisfactory retention and failure to effectively prevent the occurrence of abrasion, and achieve the effect of reducing the resistance of the slid

Inactive Publication Date: 2005-12-29
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006] An object of the present invention is to solve the above-described problems in the technology of the conventional art and to provide a slide member having a slide surface capable of reducing slide resistance between the slide member and a counterpart and allowing retention of a lubricating oil to thereby form an oil film therebetween.

Problems solved by technology

This causes problems such as unsatisfactory retention of a lubricating oil in the respective dimples and insufficient formation of an oil film between the metal slide members, thereby failing to effectively prevent occurrence of abrasion thereof.

Method used

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  • Slide member and method for producing the slide member
  • Slide member and method for producing the slide member
  • Slide member and method for producing the slide member

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Embodiment Construction

[0024] A preferred embodiment of the slide member and the method for producing the slide member, according to the present invention, will be described in detail below by referring to the accompanying drawings. The slide member has a slide surface slidable relative to a counterpart under condition that a lubricating oil is supplied between the slide member and the counterpart. In the embodiment, the slide member is used as a valve lifter in an internal combustion engine, which has a slide surface slidable relative to a cam so as to open and close an engine valve of the internal combustion engine.

[0025] Referring now to FIG. 2, there is shown a valve operating apparatus of an internal combustion engine in which the embodiment of the valve lifter according to the present invention is used. The valve operating apparatus includes intake valve 2 and exhaust valve 3 operative to open and close combustion chamber-side open ends of intake port 1a and exhaust port 1b, respectively, which are...

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Abstract

A slide member having a slide surface slidable relative to a counterpart, including a base portion and a diamond-like carbon layer formed on a surface of the base portion and provided with a plurality of microrecesses on an outer surface thereof defining the slide surface. A method for producing the slide member, including subjecting a surface of a preform of the slide member to diamond-like carbon treatment to form a diamond-like carbon layer on an outer surface of the slide member, and forming a plurality of microrecesses on an outer surface of the diamond-like carbon layer by removing microparticles from the outer surface of the diamond-like carbon layer.

Description

BACKGROUND OF THE INVENTION [0001] The present invention relates to slide members such as valve lifters and rocker arms which transmit into engine valves, a reciprocation motion thereof produced by slide contact with a rotating cam surface of a drive cam mounted on a cam shaft of internal combustion engines. The present invention also relates to a method for producing the slide members. [0002] As well known in the arts, intake valves and exhaust valves are driven to open and close intake and exhaust ports of the internal combustion engines by transmitting a rotating force of the drive cam mounted on the cam shaft thereto through valve lifters or rocker arms of a linear motion type. In this operation, an outer peripheral cam surface of the rotating drive cam comes into severe slide contact with a crown surface of the valve lifter or an upper end surface of the rocker arm via a lubricating oil film formed therebetween. The rotating force of the drive cam is transmitted as a reciprocat...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01L1/14F01L1/16
CPCF01L1/143F01L1/16F01L2820/01F01L2101/00F01L2103/00F01L2001/0537F01L2301/00F01L2303/00
Inventor TSURUTA, SEIJIISHII, SHINICHIKAMINAGA, MIYOSHIIMAMURA, TAKANORI
Owner HITACHI LTD
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