Patent ID: 7845337

Claim:
A fuel vapor recirculation device comprising: a canister that is connected with a fuel tank through a vapor line and with a purge line configured with a pressure control solenoid valve; a vapor control valve that is disposed on the vapor line and selectively connects the fuel tank and the canister in accordance with operation of an engine control unit; a vapor recirculation valve unit that is connected with the canister, receives fuel vapor from the canister, discharges the fuel vapor to atmosphere or the purge line, and supplies air to the canister; and an actuating member that is disposed between the purge line and the vapor recirculation valve unit and actuating the vapor recirculation valve unit when negative pressure is generated in the purge line; wherein the vapor recirculation valve unit comprises: a first port connected with the third nipple through a first vent line; a second port connected with the purge line through a recirculation line; a third port communicated with the atmosphere through a second vent line configured with a canister close solenoid valve that selectively connects the vapor recirculation valve unit with the atmosphere in accordance with operation of the engine control unit; a fourth port connected with a purge pressure supplying line that is connected with the recirculation line, wherein the actuating member is provided at the purge pressure supplying line; a valve housing where the first, second, third, and fourth ports are provided; and a switching member selectively opening the third port by the negative pressure supplied through the fourth port from the actuating member or by pressure supplied from the canister.