Crankcase ventilation in a combustion engine for a vehicle

Details Crankcase ventilation in a combustion engine for a vehicle Crankcase ventilation in a combustion engine for a vehicle

2007-11-06

2007-11-06

McMahon, Marguerite (Department: 3747)

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

C123S573000

Reexamination Certificate

active

11362636

ABSTRACT:
The present invention relates to a combustion engine, comprising an intake system having a throttle valve controlling an air flow to the combustion engine, a brake booster being in fluid communication with the intake system, downstream the throttle valve, via an evacuation duct for evacuation of air from the brake booster to the intake system, a crankcase being in fluid communication with the intake system, downstream the throttle valve, via a low load duct for conducting crankcase gases to the intake system, a venturi tube forming part of the low load duct, wherein the venturi tube comprises a narrow venturi tube portion forming a flow resistance within the low load duct through which the crankcase gases have to pass, wherein the evacuation duct is also fluidly connected to the venturi tube portion, via a connection duct, for further evacuation of air from the brake booster to the intake system.

REFERENCES:
patent: 5239972 (1993-08-01), Takeyama et al.
patent: 5611204 (1997-03-01), Radovanovic et al.
patent: 6606982 (2003-08-01), Stockhausen et al.
patent: 6886532 (2005-05-01), Nohara et al.

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