Piston ring and cylinder liner combination

Details Piston ring and cylinder liner combination Piston ring and cylinder liner combination

1997-12-24

1999-10-05

McMahon, Marguerite

Internal-combustion engines

Particular piston and enclosing cylinder construction

Piston

277440, F02F 500, F02F 108

Patent

active

059607629

ABSTRACT:
An outer circumferential surface of a piston ring is covered with a physical vapor deposition film, chemical vapor deposition film or composite chromium plating film. The physical vapor deposition film or chemical vapor deposition film consists of chromium or titanium nitrides (for instance CrN, Cr.sub.2 N, a mixture of Cr and Cr.sub.2 N, TiN) or carbides (for instance CrC, TiC). The composite chromium plating film contains carbides (for instance SiC) or nitrides (for instance Si.sub.3 N.sub.4) or oxides (for instance Al.sub.2 O.sub.3) in cracks in the film. A cylinder liner is made of spheroidal graphite cast iron.

REFERENCES:
patent: 5154433 (1992-10-01), Naruse
patent: 5315970 (1994-05-01), Rao et al.
patent: 5587227 (1996-12-01), Ooya
patent: 5672386 (1997-09-01), Ooya
patent: 5743536 (1998-04-01), Komuro et al.
patent: 5763106 (1998-06-01), Blanchard et al.
patent: 5773734 (1998-06-01), Young
patent: 5851659 (1998-12-01), Komuro et al.

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