Vacuum source device for vacuum booster for vehicles

Details Vacuum source device for vacuum booster for vehicles Vacuum source device for vacuum booster for vehicles

1983-09-16

1985-11-26

Look, Edward K.

Power plants

Pressure fluid source and motor

Utilizing lubricant, starter motor, cooling fluid, or fluid...

91 6, 417151, F16D 3102

Patent

active

045547866

ABSTRACT:
A vacuum source device of vacuum booster is disclosed. The device includes an air ejector having an air inlet communicated with the atmosphere, an air outlet connected to a vacuum pick-up port opening to the portion of the intake system of an internal combustion engine downstream of a throttle valve, and a pressure reduction chamber connected to a vacuum chamber of the vacuum booster. A by-pass passage connecting between the vacuum pick-up port and the vacuum chamber of the vacuum booster by detouring the diffuser of the air ejector imposes a smaller flow resistance than the diffuser. A first check valve is disposed in the by-pass passage, while a second check valve is disposed between the by-pass passage and the vacuum chamber.

REFERENCES:
patent: 1820884 (1931-08-01), Hueber et al.
patent: 3094843 (1963-06-01), Martin
patent: 4109464 (1978-08-01), Wickland
patent: 4134470 (1979-01-01), Riddel
patent: 4211200 (1980-07-01), Rocchio et al.
patent: 4380418 (1983-04-01), Crawford et al.

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