Internal combuston engine having separated cylinder head oil dra

Details Internal combuston engine having separated cylinder head oil dra Internal combuston engine having separated cylinder head oil dra

1997-11-24

1998-12-29

Yuen, Henry C.

Internal-combustion engines

Lubricators

Crankcase, pressure control

123 4186, 123196CP, 123196N, 184 18, 184 68, 184 65, F01M 100

Patent

active

058529926

ABSTRACT:
An internal combustion engine includes separated oil drain-back and crankcase ventilation passages. The oil drain-back passages extend from the cylinder head to a position below the top level of oil in the engine's crankcase. The crankcase ventilation passages extend from passages formed in the main bearing bulkheads from positions above the oil level in the crankcase and ultimately through the cylinder head. Oil dams surrounding the uppermost portions of the crankcase ventilation passages prevent oil from running downwardly through the crankcase ventilation passages.

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patent: 5501189 (1996-03-01), Van Bezeij
patent: 5664538 (1997-09-01), Hutchins

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