Automatic air conditioning system with variable displacement com

Details Automatic air conditioning system with variable displacement com Automatic air conditioning system with variable displacement com

1989-03-30

1991-06-11

Wayner, William E.

Refrigeration

Automatic control

Responsive to vehicle body motion or traction

62209, 622285, B60H 132

Patent

active

050222325

ABSTRACT:
An automatic air conditioning system for automotive vehicles with a variable displacement compressor comprises a sensor for detecting an intake air temperature, defined by a temperature of air flowing through an evaporator, placed just behind the evaporator, an intake pressure sensor for detecting an intake manifold pressure, and a CPU for determining whether the cooling requirements of the evaporator are satisfied on the basis of the intake air temperature compared to a predetermined value. The CPU controls the compressor in such a manner that the discharge volume of refrigerant discharged from the compressor is decreased only when the cooling requirements are met. Thus, the automatic air conditioning system prevents uncomfortably warm conditioned air from being discharged through a vent door under acceleration conditions.

REFERENCES:
patent: 4633675 (1987-01-01), Sato
patent: 4640254 (1987-02-01), Ninomiya
patent: 4698977 (1987-10-01), Takahashi
patent: 4796438 (1989-01-01), Sato

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