Patent ID: 8273164
Filing Date: 2012-09-25
Classification: B01D,F02M

Abstract:
1. A fuel vapor processor comprising: a fuel tank; a canister for trapping fuel vapor generated in the fuel tank; a vapor pipe for leading the fuel vapor from the fuel tank into the canister; a recovery pipe for recovering the fuel vapor desorbed from the canister into the fuel tank; an air pipe for communicating the canister with the atmosphere; a suction device disposed on the recovery pipe for desorbing the fuel vapor trapped in the canister; a vapor pipe valve for opening and closing the vapor pipe; an air pipe valve for opening and closing the air pipe; a pressure regulator communicated with the air pipe between the air pipe valve and the canister for allowing gas flow from the atmosphere toward the canister; and wherein during desorption of the fuel vapor due to the suction device, the vapor pipe valve and the air pipe valve are closed, and negative pressure is kept in the canister such that the fuel vapor is desorbed from the canister and fresh air is led into the canister via the pressure regulator.