Patent ID: 8033271
Filing Date: 2011-10-11
Classification: F02D,F02M,Y02T

Abstract:
1. A diagnostic device for a fuel vapor treatment system of a vehicle comprising: a canister that captures fuel vapor generated in a fuel tank; a purge passage for purging fuel vapor removed from the canister to an intake passage of an internal combustion engine; a purge valve provided in the purge passage to adjust a flow rate of fuel vapor; a processing device that reduces a pressure in a fuel vapor path extending from the fuel tank to the purge valve via the canister by means of a pump and performs a diagnostic processing for diagnosing a leak of fuel vapor from the fuel vapor path based on a change in pressure in the fuel vapor path during reduction of the pressure; and an angle detection device that detects an angle of inclination of the vehicle, wherein the processing device determines, based on an angle of inclination of the vehicle detected by the angle detection device, whether the diagnostic processing can be performed.