Vehicular power supply apparatus

Abstract

A vehicular power supply apparatus includes a capacitor, an idling stop means for stopping an engine at a halt of the vehicle and restarting the engine at driver's preset driving operation by supplying current to an engine starter with the capacitor, a current detecting means for detecting the current, a cumulative value calculating means for calculating cumulative value of the current on the basis of the detected current after starting of the engine starter until a set time elapses, and an abnormality determining means for determining, when engine revolution speed at the time the set time has elapsed is outside a preset range and the cumulative value is equal to or less than a preset value, that the capacitor is abnormal.

Dependencies are inferred from the claim text.