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Development of Piston Surface Treatment for Internal Combustion Engine

Article of Honda R&D Technical Review Vol.19 No.1


Low-friction surface treatment technology that provided high wear resistance was developed for the piston skirt of an internal combustion engine. Conventional low-friction coating materials consist of a solid lubricant, such as molybdenum, and the effectiveness of performance was not expected to be maintained for a long time because lower friction was realized by self-lubrication, wear, and abrasion. The newly developed technology uses a high-strength film, which has an oil adsorption effect, enabling friction to be reduced by about 40% while increasing wear resistance about 5-fold as compared to conventional coating materials. Concerning productivity, because this technology employs piston spray painting technology, the new film can be applied by simply replacing the material without any need for special production equipment.


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Author (organization or company)

Kentaro SUGIMURA(Power Products R&D Center)

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