Crankcase ventilation system for a reciprocating internal combus

Details Crankcase ventilation system for a reciprocating internal combus Crankcase ventilation system for a reciprocating internal combus

1988-05-16

1990-02-20

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

1235591, F02M 2506

Patent

active

049017039

ABSTRACT:
In a reciprocating internal combustion engine, which may be turbocharged or normally aspirated, the inlet manifold is connected by a duct 10 to a bypass 9 which in turn connects the crankcase 8 to a point upstream of the throttle. Non-return valves 11 and 12 are disposed in the duct 10 and bypass 9 respectively. An adjustable diaphragm valve 14, whose operation is controlled by the pressure in a pressure sensor line 15 leading to crankcase 8, is disposed in a bypass 13 to the valve 12. The arrangement operates to prevent crankcase overpressure under normal operating conditions of the engine.

REFERENCES:
patent: 2463828 (1949-03-01), Trisler
patent: 3175546 (1965-03-01), Roper

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