Patent ID: 7360401
Filing Date: 2008-04-22
Classification: F02M

Abstract:
1. An evaporated fuel leak detector for detecting leakage of an evaporated fuel generated in a fuel tank, the detector comprising: a differential pressure valve including a detection port, a tank port connecting to a fuel tank side, an atmosphere port opened to atmosphere, a pressure chamber and a valve member displaceable in accordance with differential pressure between the detection port and the pressure chamber for switching a connection between the detection port and the tank port and a connection between the atmosphere port and the tank port; a pump including an intake port; an electromagnetic valve for switching a connection between the intake port of the pump and the pressure chamber and a connection between the intake port of the pump and the detection port; pressure detection means for detecting pressure between the intake port of the pump and the detection port; and a reference orifice for measuring a leakage reference pressure disposed on a passage wall of a detection passage connecting between the detection port and the intake port.