FAULT DETECTOR FOR HYBRID VEHICLE

摘要

PROBLEM TO BE SOLVED: To prevent an erroneous detection that a voltage drop of a main battery is erroneously detected as an open mode fault of a contactor, etc. SOLUTION: Whether there is an open mode fault in a contactor B, etc., which opens and closes the connection between a generator 16 and a main battery 26 is detected by detecting the voltage Vj by a voltage sensor located at the generator 16 side in view of the contactor B and comparing the value of the voltage Vj with a threshold. When the current Ii detected by a current sensor 44 exceeds a specified threshold for detection even if the open mode fault judgement condition that the voltage Vj shows the value equal to a specified threshed or less satisfied, it is inhibited that a fault is judged as an open mode fault, or the threshold for detecting fault is changed to a lower one.