Refrigeration – Automatic control – Responsive to vehicle body motion or traction
Patent
1992-09-03
1993-06-08
Tanner, Harry B.
Refrigeration
Automatic control
Responsive to vehicle body motion or traction
622284, 62243, 123339, B60H 132
Patent
active
052168956
ABSTRACT:
In an engine idle speed control system associated with an air conditioner provided with an evaporator for evaporating a refrigerant compressed by a compressor actuated or deactuated by an engine near an evaporator freeze limit temperature, the engine idle speed is increased under consideration of thermal load applied to the compressor whenever the compressor is being actuated. The compressor 21 is deactuated when the temperature of air having passed through the evaporator 22 drops below a predetermined value, and actuated when the same temperature rises beyond another higher predetermined value. Whenever the compressor 21 has been deactuated, the time interval between the deactuation and the actuation of the compressor is measured. If the measured time interval is relatively short, since this indicates a relatively high thermal load applied to the compressor, the engine idle speed is increased. However, if the measured time interval is relatively long, since this indicates a relatively low thermal load, the engine idle speed is not increased, thus improving the fuel consumption rate and the compressor durability without frequently actuating and deactuating the compressor.
REFERENCES:
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Nissan Service Weekly, PB-71, No. 578, Jun. 1987, pp. E-83 to E-88.
Fukubayashi Makoto
Ishigami Kazuhiro
Kawai Nobuyuki
Nakada Naoki
Nakayama Shozo
Nissan Motor Co,. Ltd.
Tanner Harry B.
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