Vehicle air conditioner

Details Vehicle air conditioner Vehicle air conditioner

2005-05-17

2005-05-17

Norman, Marc (Department: 3744)

Refrigeration

Automatic control

Refrigeration producer

C062S230000, C062S236000, C062S323100

Reexamination Certificate

active

06892549

ABSTRACT:
In a vehicle air conditioner, a compressor is driven by a vehicle engine, and a displacement of the compressor is controlled based on a cooling load. When a post-evaporator air temperature (TE) is higher than a predetermined value (TEO+β), it is determined that the cooling load is large, and the compressor is forcibly controlled at maximum displacement that is larger than a control value controlled based on the cooling load. Accordingly, the post-evaporator air temperature (TE) can be rapidly reduced to be lower than the predetermined value (TEO+β), so that a driving time of the vehicle engine can be made shorter. As a result, fuel consumption efficiency of the vehicle engine can be effectively improved.

REFERENCES:
patent: 5867996 (1999-02-01), Takano et al.
patent: 6745585 (2004-06-01), Kelm et al.
patent: 6755033 (2004-06-01), Iwanami et al.
patent: 20040035127 (2004-02-01), Adaniya et al.
patent: 20040045307 (2004-03-01), Iwata et al.
patent: 20040079098 (2004-04-01), Uno et al.

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