| 摘要 |
PURPOSE:To intercept unprepared fuel supply due to remaining vacuum immediately by a method wherein a vacuum lock-off mechanism is released to atmosphere by a solenoid valve cooperating with engine key upon stopping the engine, in the fuel supplying device equipped with the vacuum lock-off mechanism for a vaporizer. CONSTITUTION:During the operation of the engine or when the engine key 2 is being ON, the valve body 24 of a three-way solenoid valve 20 is lifted up and communicating paths 19A, 19B are communicated mutually, therefore, the suction vacuum of the downstream of a throttle valve 14 acts on the chamber 18 of the vacuum lock-off mechanism A. As a result, a diaphragm 16 is moved to the right to open a secondary valve 9, therefore, the vaporizer 4 sends out the fuel regulated so as to have a predetermined secondary pressure into a mixer 12. On the other hand, when the engine key 2 is OFF to stop the engine, the valve body 24 is pushed down, the communicating path 19A is communicated with the atmosphere and the ambient air is introduced into said chamber 18. As a result, the secondary valve 9 is closed and the fuel supply for the mixer 12 side is stopped. |
