| 摘要 |
<p>A leak diagnostic apparatus is provided for an evaporative emission control system that purges fuel vapor from an inside of a fuel tank (1) to an intake passage (6) of an internal combustion engine. The leak diagnostic apparatus is basically provided with a pressure detecting device and a leak determining device. The pressure detecting device is configured and arranged to detect a pressure inside the evaporative emission control system, which includes the fuel tank (1). The leak determining device sets a leak determination threshold value in accordance with a deformation amount of the fuel tank (1), and determines if a leak exists by comparing the pressure inside the evaporative emission control system while the evaporative emission control system is sealed to the leak determination threshold value.</p> |
