Altitude compensated vacuum supply system and control

Details Altitude compensated vacuum supply system and control Altitude compensated vacuum supply system and control

1980-10-20

1983-11-01

Nilson, Robert G.

Power plants

Pressure fluid source and motor

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

60409, 60412, 417 14, F15B 1518

Patent

active

044124163

ABSTRACT:
An altitude compensating control system for a vacuum pump supplying a vehicle accessory vacuum supply system comprising, in a preferred embodiment, a dual diaphragm pressure switch spring biased in a closing direction to actuate the pump and having an ambient pressure exposed diaphragm acting in a switch-opening direction opposed by a controlled vacuum pressure exposed diaphragm of larger area acting in a switch closing direction to provide a controlled vacuum pressure range that declines from a desired operational vacuum pressure range at sea level to a lower satisfactory vacuum level for efficient operation at higher altitudes. Other features and advantages are also disclosed.

REFERENCES:
patent: 2323519 (1943-07-01), Dean
patent: 2705870 (1955-04-01), Holton
patent: 2844003 (1958-07-01), Ingres
patent: 4328669 (1982-05-01), Mort
patent: 4358928 (1982-11-01), Kotwicki

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