| 摘要 |
Methods and systems for cutting off the supply of fuel to an engine in response to engine turn-off. A fuel cutoff solenoid or functionally equivalent device is connected to a source of electrical power in response to detection of conditions representing engine turn-off. One method for cutting off the supply of fuel to the engine comprises the following steps: detecting whether ignition pulses are present; and then activating a device for cutting off the supply of fuel to the engine in response to detecting the cessation of ignition pulses. The fuel cutoff device is activated by connecting it to either a battery or an output of a generator being driven by the engine. In the latter case, the rotor is grounded and a bipolar transistor is bypassed in response to detection of conditions representing engine turn-off.
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