Oil passage structure for engine

Details Oil passage structure for engine Oil passage structure for engine

1998-04-30

1999-06-22

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

Lubrication

123196M, 184 65, 184 69, F01M 106

Patent

active

059132930

ABSTRACT:
An oil passage structure of an engine is provided, wherein oil is prevented from being drained from an oil passage when the engine is stopped, and air mixed into the oil in the oil passage can be surely removed. The oil passage structure includes a first oil path or paths for supplying oil to lash adjusters of a cylinder head of the engine, a second oil path that communicates with an oil pump and supplies oil into an upstream portion of each first oil path, and an air vent passage that is connected to a downstream portion of each first oil path and has an opening through which the air is to be removed from the oil path. The second oil path and the opening of the air vent passage are located at higher positions than the first oil path(s).

REFERENCES:
patent: 3782357 (1974-01-01), Kuhn et al.
patent: 4441465 (1984-04-01), Nakamura
patent: 4928641 (1990-05-01), Niizato et al.
patent: 5161495 (1992-11-01), Saito
patent: 5195472 (1993-03-01), Jacques et al.
patent: 5220891 (1993-06-01), Nakamura et al.

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