Method for controlling the operation of a variable displacement

Details Method for controlling the operation of a variable displacement Method for controlling the operation of a variable displacement

1988-06-29

1989-09-05

Freeh, William L.

Refrigeration

Processes

Compressing, condensing and evaporating

62133, 622285, 417222, 417 53, F25B 102, B60H 132, F04B 128

Patent

active

048627003

ABSTRACT:
A method for controlling the operation of a variable displacement refrigerant compressor arranged in a car air-conditioner circuit and driven by a car engine via a solenoid clutch is carried out in a manner such that, when a car engine rotating speed is lower than an idling speed and when either one of a brake pedal or a manual brake of the car is released after temporary stoppage of the car, a control device having a CPU unit therein issues a control signal to cause a displacement varying wobble plate element of the variable displacement refrigerant compressor to be always moved angularly to a predetermined position to obtain a minimum displacement condition of the compressor, so that the compressor is restarted from the minimum displacement condition when the car is restarted after a temporary stoppage thereof at, e.g., an intersection of a vehicle road.

REFERENCES:
patent: 4132086 (1979-01-01), Kountz
patent: 4510764 (1985-04-01), Suzuki
patent: 4796438 (1989-01-01), Sato

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