| 摘要 |
PROBLEM TO BE SOLVED: To provide a trouble determination device for temperature sensors capable of easily and accurately performing trouble determination in the actual use temperature ranges of the temperature sensors even if the use temperature ranges are different from each other. SOLUTION: This trouble determination device comprises an initial temperature storage means 2 storing the temperatures Ta, Tb, Tc detected by a plurality of exhaust gas temperature sensors A, B, C when an internal combustion engine 3 is stopped as the initial temperatures Taini, Tbini, Tcini, a dimensionless value calculation means 2 calculating the dimensionless values a, b, c of the temperatures detected by the exhaust gas temperature sensors A, B, C by making dimensionless the temperatures Ta, Tb, Tc detected by the exhaust gas temperature sensors A, B, C detected after the internal combustion engine 3 is stopped on the basis of the corresponding initial temperatures Taini, Tbini, Tcini, a normal predicted value setting means 2 pre-setting, as a normal predicted value N, the predicted value of the dimensionless value of the detected temperatures when the exhaust gas temperature sensors A, B, C are normal, and a trouble determination means 2 determining the trouble of the exhaust gas temperature sensors A, B, C on the basis of the result of comparison between the dimensionless values a, b, c and the normal predicted value N. COPYRIGHT: (C)2007,JPO&INPIT
|
