Patent ID: 6993957
Filing Date: 2006-02-07
Classification: F02D,F02M

Abstract:
1. A leak check device comprising: an evaporated fuel purge system including a fuel tank, an adsorption filter which connects to the fuel tank through a connecting pipe and has a venting flow path, and a vent valve connected to an intake system of an engine through a valve flow path; a pump which pressurizes or depressurizes the venting flow path to inspect state of leakage in the evaporated fuel purge system; a motor unit which drives the pump for applying or reducing pressure; an in-vehicle battery for the motor unit; and a voltage control circuit which controls a battery voltage supplied from the in-vehicle battery to the motor unit to a predetermined voltage, wherein the predetermined voltage is more than 67% of a nominal voltage of the in-vehicle battery and wherein the predetermined voltage of less than 84% of the nominal voltage of the in-vehicle battery.