Sliding contact-making structures in internal combustion engine

Details Sliding contact-making structures in internal combustion engine Sliding contact-making structures in internal combustion engine

1995-05-26

1996-08-27

Okonsky, David A.

Internal-combustion engines

Particular piston and enclosing cylinder construction

Piston

1231932, 123668, C25D 704, C25D 502

Patent

active

055490867

ABSTRACT:
Sliding contact-making structures of an internal combustion engine, which comprise (a) a cylinder unit having an inner plating coating containing a dispersoid substance such as a plating coating of Ni-P-SiC or Ni-SiC; and (b) a piston provided with at least one piston ring, fitted into the inside of the cylinder in the axial direction so as to freely slide upon the inside surface thereof, are characterized in that the piston ring has a surface in sliding contact with the inside surface, which surface is covered with a vapor deposition layer such as a physical vapor deposition layer of TiN or CrN, whereby resistance to friction abrasion and seize, and the friction coefficient can be effectively improved.

REFERENCES:
patent: 3885959 (1975-05-01), Badia et al.
patent: 3932228 (1976-01-01), Sugiyama et al.
patent: 3945893 (1976-03-01), Ishimori et al.
patent: 3981781 (1976-09-01), Mori et al.
patent: 4666786 (1987-05-01), Yano et al.
patent: 5154433 (1992-10-01), Naruse
patent: 5162065 (1992-11-01), Scott et al.

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