Patent ID: 7685867
Filing Date: 2010-03-30
Classification: F02M

Abstract:
1. A leak diagnostics apparatus for a vaporized fuel processing system that purges vaporized fuel in a fuel tank of a vehicle, comprising: a first leak diagnostic device that carries out a first leak diagnosis of the vaporized fuel processing system while the engine is operating; a second leak diagnostic device that carries out a second leak diagnosis of the vaporized fuel processing system after the engine has stopped; a fuel tank condition detection device that detects fuel volume in the fuel tank; and a determining device that makes a determination as to whether the first leak diagnosis or the second leak diagnosis should be carried out based on the detected fuel volume of the fuel tank, the determining device making the determination to permit execution of the first leak diagnosis and to invalidate execution of the second leak diagnosis when the detected fuel volume is the same as or greater than a designated fuel volume.