Patent ID: 6892712
Filing Date: 2005-05-17
Classification: F02M

Abstract:
1. An apparatus of checking a leak in a fuel vapor purge system comprising: pressure detecting means for detecting a pressure of a fuel vapor purge system including a fuel tank; leak checking means for checking presence or absence of the leak in the fuel vapor purge system based on the pressure of the fuel vapor purge system detected by the pressure checking means when the fuel vapor purge system is maintained in a hermetically closed state; erroneous check avoiding means for avoiding an erroneous check caused by a deformation of the fuel tank; restricting means for restricting the pressure of the fuel vapor purge system into a predetermined restricted value when the leak checking means checks the leak; temperature determining means for determining a temperature in the fuel tank or a temperature around the fuel tank or information related thereto; and means for changing the restricted value based on the temperature determined by the temperature determining means.