Engine lubrication system

Details Engine lubrication system Engine lubrication system

1998-09-21

1999-11-23

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

Lubrication

123 9033, 123196M, 184 65, 184 111, F01M 910

Patent

active

059881291

ABSTRACT:
An overhead cam engine with an engine lubrication system comprises a valve train assembly which includes a camshaft rotatably supported by a cylinder head. An oil lubricated camshaft drive chain engages the camshaft to rotate it. A valve train lubricating assembly is disposed above the cylinder head and includes a baffle, radially positioned from the drive chain, to capture oil spray departing from the drive chain and a trough positioned above the valve train assembly. The trough is configured as an upward facing U-shaped channel, including an end wall to close the trough, defining a reservoir to collect oil from the baffle. Side outlets allow oil to overflow from the trough where outward protruding dimples act as precipitation points to target lubrication onto the valve train assembly.

REFERENCES:
patent: 4343270 (1982-08-01), Kawabe
patent: 4881497 (1989-11-01), Matayoshi et al.
patent: 4944264 (1990-07-01), Murasaki et al.
patent: 4987974 (1991-01-01), Crouch
patent: 5033989 (1991-07-01), Shimaguchi
patent: 5447127 (1995-09-01), Luck et al.

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