Internal-combustion engines – Charge forming device – Crankcase vapor used with combustible mixture
Patent
1995-05-26
1996-03-12
Macy, Marguerite
Internal-combustion engines
Charge forming device
Crankcase vapor used with combustible mixture
F01M 1300
Patent
active
054977550
ABSTRACT:
Crankcase ventilation systems for internal combustion engines generally utilize external lines which increase the complexity of the engine while decreasing the engine's flexibility. Additionally, systems which utilize internal methods for ventilating the blow-by gas leaking past the piston rings generally do not properly ventilate the crankcase. The present invention overcomes these problems by providing crankcase ventilation system which utilizes a simplified design for an internal combustion engine with hydraulically actuated valves. A passage is disposed within the engine for fluid communication between a crankcase and a combustion chamber. A valve means is disposed within the passage for controlling the communication therebetween. Either by utilizing a means for sensing the pressure within the crankcase or in sequential cycles, an intake valve is closed as the valve means is simultaneously opened by any suitable means so that blow-by gas within the crankcase flows freely through the passage to the combustion chamber for reburning. The present invention is simple, cost-effective, and eliminates additional external lines for an effective method of ventilating the crankcase.
REFERENCES:
patent: 4158353 (1979-06-01), Darnell
patent: 4269607 (1981-05-01), Walker
patent: 4363310 (1982-12-01), Thurston
patent: 4602607 (1986-07-01), Balsley
patent: 4681068 (1987-07-01), Anno et al.
patent: 4721090 (1988-01-01), Kato
patent: 5347968 (1994-09-01), Johnson, Jr.
Caterpillar Inc.
Charlton Diana L.
Macy Marguerite
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