Kabushiki Kaisha Toyota Chuo Kenkyusho

Shigeru Hotta

Mamoru Tohyama

Hiroyuki Mori

Toshihide Ohmori

Hiroshi Moritani

Hideo Tachikawa

Fumio Shimizu

Hisato Takeuchi

Takashi Iseki

Yoshio Shimura

Yoshihiro Kikuzawa

Norikazu Sato

Tomoyuki Kinjo

[Technical Problem] An object is to provide a lubricant capable of forming a stable adsorption film on a sliding surface and stabilizing the sliding characteristics (for example, ensuring the wear resistance, etc.). [Solution to Problem] The present invention provides a lubricant represented by the following chemical structural formula. (R: a hydrocarbon group whose carbon number is 8 to 24, m and n: integers of 2 to 8) [Selected Figure] FIG.A

Lubricant, lubricating composition, and sliding machine

A sliding system includes a pair of sliding members having sliding surfaces that can relatively move while facing each other and a lubricant oil interposed between the sliding surfaces facing each other. At least one of the sliding surfaces includes a coating surface of a crystalline Cr plating film. The lubricant oil contains an oil-soluble molybdenum compound comprising a trinuclear Mo structure. In particular, considerably low friction properties can be developed by a combination of the Cr plating film, in which at least one of three types of peak area intensity ratios (Pto P) as obtained by X-ray diffraction falls within a predetermined range (P&#x2265;0.015, P&#x2265;0.02, P&#x2265;0.03), and the lubrication oil which contains the trinuclear Mo structure.

Sliding system

A low-friction sliding member is used under a wet condition employing a lubricant, and includes a substrate having a surface, and an amorphous hard carbon film formed on the surface of the substrate for contacting slidably with a mating member. The amorphous hard carbon film includes silicon in an amount of from 1 atomic % or more to 20 atomic % or less, hydrogen in an amount of from 20 atomic % or more to 50 atomic % or less, and the balance of carbon and inevitable impurities, when the entirety is taken as 100 atomic %, and exhibits a surface roughness Rzof 0.8 &#x3bc;m or less. The low-friction sliding member exhibits reduced friction coefficients between itself and mating members, without relying on the adsorption and reaction of additives, included in lubricants, to the amorphous hard carbon films.

Low-friction sliding member

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Nagakute, Japan

Shigeru Hotta