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    Thermostat malfunction detecting system for engine cooling system
    1.
    发明申请
    Thermostat malfunction detecting system for engine cooling system 有权
    发动机冷却系统温控器故障检测系统

    公开(公告)号：US20020088274A1

    公开(公告)日：2002-07-11

    申请号：US10100039

    申请日：2002-03-19

    申请人： DENSO CORPORATION

    发明人： Tatsuya Oka ,  Keiji Wakahara ,  Akira Ichikawa

    IPC分类号： G01M019/00

    CPC分类号： F01P11/16 ,  F01P5/02 ,  F01P11/14 ,  F01P2023/00 ,  F01P2023/08 ,  F01P2025/08 ,  F01P2025/13 ,  F01P2025/62 ,  F01P2025/64 ,  F01P2025/66 ,  F01P2031/00 ,  F01P2031/20 ,  F01P2060/14 ,  F02D41/18 ,  F02D41/22 ,  F02D2200/0406 ,  F02D2200/0414 ,  G01K15/00 ,  Y02T10/40

    摘要： A malfunction of a thermostat in a coolant circulating path is detected from an engine side coolant temperature in consideration of the following behavior of the coolant temperature. When an open-malfunction occurs, the coolant temperature becomes different considerably from that in the normal time in the temperature range in which the thermostat is to be normally closed. When a closure-malfunction occurs, the coolant temperature becomes different considerably from that during the normal time in the temperature range in which the thermostat is to be normally opened. Alternatively, the malfunction may be detected from a difference between the engine side coolant temperature and a radiator side coolant temperature.

    摘要翻译： 考虑到冷却剂温度的以下行为，从发动机侧冷却剂温度检测冷却剂循环路径中的恒温器的故障。 当发生开路故障时，冷却剂温度与恒温器常闭温度范围内的正常时间显着不同。 当发生闭合故障时，冷却剂温度与在恒温器正常打开的温度范围内的正常时间显着不同。 或者，可以从发动机侧冷却剂温度和散热器侧冷却剂温度之间的差异来检测故障。