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    • 3. 发明授权
    • Abnormality determination apparatus and abnormality determination method for coolant temperature sensor, and engine cooling system
    • 异常判定装置和冷却剂温度传感器的异常判定方法以及发动机冷却系统
    • US09261012B2
    • 2016-02-16
    • US13879185
    • 2011-11-08
    • Tatsuki Saitoh
    • Tatsuki Saitoh
    • F01P7/14F01P7/16F01P11/16F01P5/10
    • F01P7/16F01P7/165F01P11/16F01P2005/105F01P2007/146F01P2060/08F01P2070/04
    • When a temperature difference between intake air temperature that detected by an intake air temperature sensor and engine coolant temperature thw1 detected by an engine coolant temperature sensor is greater than a threshold value, a coolant temperature sensor abnormality determination apparatus opens a changeover valve to cause the coolant to flow into an engine coolant passageway, thereby mixing the coolant in an engine and the coolant in a heater passageway (bypass passageway). If the temperature difference between the engine coolant temperature thw1 and a heater inlet coolant temperature (bypass coolant temperature) thw2 occurring after the changeover valve opens is less than or equal to a predetermined value, the apparatus determines that the engine coolant temperature sensor is normal. If the temperature difference is greater than the predetermined value, the apparatus determines that the engine coolant temperature sensor is abnormal.
    • 当由进气温度传感器检测到的进气温度与由发动机冷却剂温度传感器检测到的发动机冷却剂温度thw1之间的温差大于阈值时,冷却剂温度传感器异常判定装置打开切换阀,使冷却剂 流入发动机冷却剂通道,从而将发动机中的冷却剂和加热器通道(旁路通道)中的冷却剂混合。 如果发动机冷却剂温度thw1与切换阀打开后发生的加热器入口冷却剂温度(旁路冷却剂温度)thw2之间的温差小于或等于预定值,则该装置确定发动机冷却剂温度传感器正常。 如果温度差大于预定值,则装置确定发动机冷却剂温度传感器异常。
    • 4. 发明申请
    • ABNORMALITY DETERMINATION APPARATUS AND ABNORMALITY DETERMINATION METHOD FOR COOLANT TEMPERATURE SENSOR, AND ENGINE COOLING SYSTEM
    • 冷却温度传感器和发动机冷却系统的异常判定装置和异常判定方法
    • US20130213600A1
    • 2013-08-22
    • US13879669
    • 2011-11-08
    • Tatsuki Saitoh
    • Tatsuki Saitoh
    • F01P11/18F01P7/16
    • F01P11/18F01P7/16F01P7/165F01P2025/32
    • A coolant temperature sensor abnormality determination apparatus opens a changeover valve to increase the temperature of a coolant in a heater passageway if the amount of increase of the detected heater inlet coolant temperature value obtained when the intake air amount of an engine becomes equal to or greater than a predetermined value is small. Then, if the amount of increase in the detected heater inlet coolant temperature value after the changeover valve opens is greater than or equal to the predetermined value, the apparatus determines that the heater inlet coolant temperature sensor is normal. If the amount of increase in the detected heater inlet coolant temperature value is smaller than the predetermined value, the apparatus determines that the heater inlet coolant temperature sensor is abnormal.
    • 如果发动机的进气量变得等于或等于所获得的检测到的加热器入口冷却剂温度值的增加量,则冷却剂温度传感器异常判定装置打开切换阀,以增加加热器通道中的冷却剂的温度 预定值小。 然后,如果在切换阀打开后检测到的加热器入口冷却剂温度值的增加量大于或等于预定值,则装置确定加热器入口冷却剂温度传感器正常。 如果检测到的加热器入口冷却剂温度值的增加量小于预定值,则装置确定加热器入口冷却剂温度传感器异常。
    • 5. 发明申请
    • ABNORMALITY DETERMINATION APPARATUS AND ABNORMALITY DETERMINATION METHOD FOR COOLANT TEMPERATURE SENSOR, AND ENGINE COOLING SYSTEM
    • 冷却温度传感器和发动机冷却系统的异常判定装置和异常判定方法
    • US20130213324A1
    • 2013-08-22
    • US13879185
    • 2011-11-08
    • Tatsuki Saitoh
    • Tatsuki Saitoh
    • F01P7/16
    • F01P7/16F01P7/165F01P11/16F01P2005/105F01P2007/146F01P2060/08F01P2070/04
    • When a temperature difference between intake air temperature that detected by an intake air temperature sensor and engine coolant temperature thw1 detected by an engine coolant temperature sensor is greater than a threshold value, a coolant temperature sensor abnormality determination apparatus opens a changeover valve to cause the coolant to flow into an engine coolant passageway, thereby mixing the coolant in an engine and the coolant in a heater passageway (bypass passageway). If the temperature difference between the engine coolant temperature thw1 and a heater inlet coolant temperature (bypass coolant temperature) thw2 occurring after the changeover valve opens is less than or equal to a predetermined value, the apparatus determines that the engine coolant temperature sensor is normal. If the temperature difference is greater than the predetermined value, the apparatus determines that the engine coolant temperature sensor is abnormal.
    • 当由进气温度传感器检测到的进气温度与由发动机冷却剂温度传感器检测到的发动机冷却剂温度thw1之间的温差大于阈值时,冷却剂温度传感器异常判定装置打开切换阀,使冷却剂 流入发动机冷却剂通道,从而将发动机中的冷却剂和加热器通道(旁路通道)中的冷却剂混合。 如果发动机冷却剂温度thw1与切换阀打开后发生的加热器入口冷却剂温度(旁路冷却剂温度)thw2之间的温差小于或等于预定值,则该装置确定发动机冷却剂温度传感器正常。 如果温度差大于预定值,则装置确定发动机冷却剂温度传感器异常。