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1. 发明授权

US5623835A System for controlling air flow to a vehicle air conditioning unit 失效
标题翻译：用于控制到车辆空调单元的空气流量的系统
公开(公告)号：US5623835A
公开(公告)日：1997-04-29
申请号：US521821
申请日：1995-08-31
申请人： Robert J. Layman , Rebecca J. Darr , Jimmie J. Trushlood
发明人： Robert J. Layman , Rebecca J. Darr , Jimmie J. Trushlood
IPC分类号： B60H1/00 , B60H1/32 , F01P7/08 , F25B49/02 , F25B39/04
CPC分类号： F01P7/08 , B60H1/00764 , B60H1/3208 , F01P2023/08 , F01P2025/66 , F01P2060/14 , F25B49/027
摘要： An engine cooling fan control system includes a vehicle speed sensor, a pressure sensor for sensing the pressure of refrigerant provided to a refrigerant condenser forming part of the vehicle air conditioning system and a controller responsive to the vehicle speed and refrigerant pressure signals to operate an engine cooling fan. The engine cooling fan is activated continuously while vehicle speed is below a first speed threshold if the refrigerant pressure exceeds a first pressure. While the vehicle speed is above the first speed threshold, but below a second speed threshold, the engine cooling fan is activated for a predetermined duration if the refrigerant pressure is above the first pressure. Finally, while the vehicle speed is above the second speed threshold, the engine cooling fan is activated in response to the refrigerant pressure exceeding the first pressure and deactivated in response to the refrigerant pressure falling below a second lower pressure.
摘要翻译：发动机冷却风扇控制系统包括车速传感器，用于感测提供给形成车辆空调系统的一部分的制冷剂冷凝器的制冷剂的压力的压力传感器和响应于车辆速度和制冷剂压力信号的控制器以操作发动机冷风扇。如果制冷剂压力超过第一压力，则车速低于第一速度阈值时，发动机冷却风扇被连续地启动。当车速高于第一速度阈值但低于第二速度阈值时，如果制冷剂压力高于第一压力，则发动机冷却风扇被激活预定的持续时间。最后，当车速高于第二速度阈值时，发动机冷却风扇响应于制冷剂压力超过第一压力而被激活，并且响应于制冷剂压力低于第二较低压力而停用。

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