Method and apparatus for controlling vehicular air-conditioning

Details Method and apparatus for controlling vehicular air-conditioning Method and apparatus for controlling vehicular air-conditioning

1998-09-02

1999-11-16

Tanner, Harry B.

Refrigeration

Automatic control

Responsive to vehicle body motion or traction

62243, 623234, B60H 132, F02D 2904

Patent

active

059836504

ABSTRACT:
In order to effectively perform on/off control for an air-conditioning system carried on an automobile during idling operation of the automobile, if a state, in which a difference between a target idling number of revolution and a net idling number of revolution is larger than a preset difference value, is continued for a preset period of time, then an electromagnetic clutch is disconnected, and a compressor is allowed to be in an operation stop state. After that, if the difference is smaller than the preset difference value, and a state, in which the difference is smaller than the preset difference value, is continued for a preset period of time, then the electromagnetic clutch is connected, and the compressor is restored to be in an operating state. By doing so, it is possible to previously avoid the occurrence of vibration of the vehicle body due to vibration of the engine, and the occurrence of booming noise in the vehicle's cabin caused by the vibration. The air-conditioning system is automatically restored to be in the operating state when it is judged that the state of the engine is restored. Therefore, the convenience of use of the air-conditioning system is improved.

REFERENCES:
patent: 4556942 (1985-12-01), Russo et al.
patent: 5216895 (1993-06-01), Kawai et al.
patent: 5644924 (1997-07-01), Carr et al.
patent: 5694781 (1997-12-01), Peterson

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