| 摘要 |
PROBLEM TO BE SOLVED: To provide an earth detector capable of enhancing fault determination accuracy in a fault diagnosis as a first purpose and to correct a determination error due to aged deterioration and temperature characteristics in the fault diagnosis as a second purpose. SOLUTION: A pseudo insulation resistance deterioration in a high-voltage power supply system 40 is caused by a pseudo insulation resistance deterioration section 10 by electrically connecting the high-voltage power supply system 40 and a vehicle body 60 to each other via resistors R1 and R2 for a fault diagnosis. At the time of occurrence of the pseudo insulation resistance deterioration, a response when a predetermined signal is output from a signal outputting section 31 to a wiring route 12 connecting the high-voltage power supply system 40 and the resistors R1 and R2 to one another is acquired by a signal inputting section 32 as a detection signal. Then, a controller 30 determines whether or not the detection signal is included within a normal range set according to resistance values of the resistors R1 and R2 and, in a case where the detection signal is determined not to be included within the normal range, determines abnormality of the high voltage power supply system 40. COPYRIGHT: (C)2013,JPO&INPIT |
