Crankcase ventilation system for outboard motor

Details Crankcase ventilation system for outboard motor Crankcase ventilation system for outboard motor

1994-09-08

1996-02-06

Macy, Marguerite

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

12318435, B63H 2126

Patent

active

054889391

ABSTRACT:
A ventilation system is provided for an engine crankcase of a marine outboard motor to distribute blow-by gas generally equally to each cylinder while minimizing the size of an intake silencer of the system. The intake silencer includes a first expansion chamber into which the blow-by gas is introduced from a blow-by gas camber attached to the cylinder head. The blow-by gas diffuses and mixes with ambient air which is drawn into the first expansion chamber through an inlet port of the induction system. The air/blow-by gas mixture is then drawn into a second expansion chamber where it distributes generally evenly before induction into a charge forming device.

REFERENCES:
patent: 2971505 (1961-02-01), Fortney
patent: 4493295 (1985-01-01), Ampferer
patent: 4517951 (1985-05-01), Otaka et al.
patent: 4528969 (1985-07-01), Senga
patent: 4779601 (1988-10-01), Dallman
patent: 4811697 (1989-03-01), Kurahashi
patent: 5195481 (1993-03-01), Oyama et al.

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