Crankcase vacuum system

Details Crankcase vacuum system Crankcase vacuum system

1979-08-09

1981-03-24

Lazarus, Ronald H.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

123574, F02M 2506

Patent

active

042573831

ABSTRACT:
An engine crankcase vacuum system wherein a check valve is interposed between the intake manifold and the fuel pump and is in open communication with the crankcase breather of the engine in order to rapidly create and maintain a vacuum in the crankcase. The crankcase vacuum greatly reduces oil migration around the piston rings and valve guides of the engine in order to reduce oil consumption, decrease contamination of the combustion chamber from oil leakage, and reduce detonation tendency. The crankcase vacuum also allows a reduction in oil ring tension which in turn reduces engine friction, resulting in a high power output and cooler running engine during operation thereof.

REFERENCES:
patent: 3338222 (1967-08-01), Rauen
patent: 3820518 (1974-06-01), Dolfi
patent: 4195607 (1980-04-01), Nagasaka

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