Thermostat diagnostic apparatus

Thermostat diagnostic apparatus

  • CN 102,482,985 A
  • Filed: 09/21/2010
  • Published: 05/30/2012
  • Est. Priority Date: 09/30/2009
  • Status: Active Grant
First Claim
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1. thermostat diagnostic device comprises:

  • The coolant temperature sensor;

    The engine operating state sensor;


    It is configured to carry out with the comparison of estimating coolant temperature based on actual coolant temperature the Fault Diagnosis that is stuck in open position of thermostat;

    Wherein, said actual coolant temperature is by said coolant temperature sensor, said estimation coolant temperature based on by said engine operating state sensor to engine operating state and estimate;

    Said thermostat is arranged in the coolant flow passage that is installed in the said motor in the moving bodyThe condition that increases at the rate of heat exchange that satisfies radiator the duration, said trouble-shooter confirms whether said thermostat is stuck in open position when having confirmed that said estimation coolant temperature or said actual coolant temperature surpass the stipulated standard value.

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