| 摘要 |
A fuel flow control system in a motor vehicle comprises a solenoid-actuated valve mounted in a fuel line, in which the valve member can be held in positions preventing and allowing fuel flow. The valve member may take the form of a magnetic plunger 20 located in a fuel flow channel 13, 15, urged open by a spring 21, with magnets 22 positioned to bias the valve closed. The valve is opened by a control unit (figure 2, not shown) when a code is entered via a keypad. Entering the wrong code will cause an alarm to sound. The valve is closed by the control unit after the engine of the vehicle is switched off, or if an impact is sensed. The control unit may send pulses to the valve while the engine is running to ensure that the valve does not stick in place. The code may be entered using an infra-red remote control unit. <IMAGE> |
