发明名称 |
Method and system for detecting low refrigerant charge and air conditioner protection system |
摘要 |
A method and system for detecting a low charge condition in an air conditioner for a vehicle. The system first determines whether noise factors are present that would interfere with reliably measuring a pressure delta. If noise factors are not present, the system determines a pressure delta value for the compressor by comparing the high side pressure when the clutch is engaged to a high side pressure when the clutch is disengaged. If the pressure delta value is less than a threshold value, a low charge condition may be recorded. When the number of low charge conditions detected exceeds a predetermined number of events, the system may set a temperature diagnostic trouble code, disable the air conditioning system and alert the driver of a potential problem. |
申请公布号 |
US8205461(B2) |
申请公布日期 |
2012.06.26 |
申请号 |
US20090359561 |
申请日期 |
2009.01.26 |
申请人 |
JOHNSTON WILLIAM STEWART;WONG DAVID ALAN;HAMILTON HUGH;KOBERSTEIN MANFRED;DHAR DEBASISH;FORD GLOBAL TECHNOLOGIES, LLC |
发明人 |
JOHNSTON WILLIAM STEWART;WONG DAVID ALAN;HAMILTON HUGH;KOBERSTEIN MANFRED;DHAR DEBASISH |
分类号 |
F25B45/00 |
主分类号 |
F25B45/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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