| 摘要 |
PURPOSE:To prevent an air-fuel ratio from being thickened so much, by closing a purge control valve or cutting off a vapored fuel feed passage at a driving range where a suction air quantity is little under broiling weather, and thereby stopping a purge to a suction system of vapored fuel at a canister. CONSTITUTION:A device bearing the above caption connects a storage chamber 10 of a canister 9 to a suction passage 5 at the downstream side of a throttle valve 3 through a vapored fuel feed passage 13 and installs a diaphragm type purge control valve 14 to be opened in time of partial load driving when suction pressure comes strong. In this case, a solenoid valve 25 is installed alongside in the point midway in a pressure signal passage 16 connecting a throttle chamber 4 of a pressure chamber 15 to a position proximate to the throttle valve 3. And, this solenoid valve 25 is controlled by a control unit 22 so as to be opened in time of engine starting when suction air temperature is above the setting value and suction flow is below the setting one, according to each signal out of a temperature sensor 23 and an air flow meter 2 being inputted in advance for driving a fuel injection valve 21. |
