| 摘要 |
An immobiliser for a vehicle engine includes a fuel valve (17) having an electrical actuator requiring a pre-defined data signal to effect operation of the valve (17). An electronic module has a radio frequency receiver having an aerial (12) which controls the supply of the data signal to the valve (17). A portable token (13) has a radio frequency transmitter which transmits a signal for detection by the receiver. The state of the fuel valve (17) is thus controlled by the electronic module dependent upon reception of the transmitted signal. Operation of the system may be inhibited when the speed of the vehicle is above a pre-set minimum and the position of the accelerator pedal may also be monitored to enable the system to be activated only if an attempt is made to drive the vehicle. Engine starter and engine management system inhibition may also be controlled.
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