Motor vehicle air-conditioning apparatus with engine speed contr

Details Motor vehicle air-conditioning apparatus with engine speed contr Motor vehicle air-conditioning apparatus with engine speed contr

1998-09-22

1999-07-20

Tanner, Harry B.

Refrigeration

Automatic control

Responsive to vehicle body motion or traction

622283, 622285, 62229, 12333917, B60H 132

Patent

active

059242965

ABSTRACT:
An automobile air-conditioning apparatus in which the compressor torque of a variable capacity refrigerant compressor is estimated with improved accuracy. The compressor torque is measured on the basis of (1) high-side pressure of the refrigerating circuit directly influencing the compressor torque and (2) a control current value directly controlling the compressor. The accurately estimated compressor torque is then used to stabilize the speed of the vehicle engine driving the compressor.

REFERENCES:
patent: 4856291 (1989-08-01), Takahashi
patent: 4898005 (1990-02-01), Sakurai
patent: 4976589 (1990-12-01), Ide
patent: 5285649 (1994-02-01), Yamanaka et al.
patent: 5385029 (1995-01-01), Yamanaka et al.
patent: 5752387 (1998-05-01), Inagaki et al.

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