Air conditioning system for automotive vehicles

Details Air conditioning system for automotive vehicles Air conditioning system for automotive vehicles

1988-12-27

1989-08-15

Wayner, William E.

Refrigeration

Automatic control

Refrigeration producer

622284, 623234, F25B 4104

Patent

active

048562912

ABSTRACT:
In an air conditioning system for automotive vehicles, a thermal load on the system is detected, and a desired value of suction pressure of refrigerant gas to a variable capacity type compressor is calculated on the basis of the detected thermal load, in accordance with a predetermined suction-pressure vs. thermal-load characteristic. The suction pressure is controlled on the basis of the calculated desired suction-pressure value. A value of torque required for driving the compressor is calculated on the basis of the calculated suction pressure, on the basis of the detected thermal load in accordance with a predetermined required-driving-torque vs. suction-pressure characteristic. Engine rotational speed at idling is set on the basis of the calculated torque value.

REFERENCES:
patent: 4646534 (1987-03-01), Russell
patent: 4691526 (1987-09-01), Kobayashi et al.
patent: 4789025 (1988-12-01), Brandemuehl et al.

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