| 摘要 |
The system comprises a transmitter 10 on the person of a driver and a receiver 13 on the vehicle. The transmitter sends a coded signal which when received enables the vehicle to be driven. In the absence of such a signal, the vehicle is disabled as by closing a valve 15 in the fuel line. Thus when the vehicle is hijacked and the driver left behind, the vehicle comes to a stop when the signal from the driver is no longer received. The transmitter may be operative to transmit the coded signal only upon receipt of a coded signal from a transmitter on the vehicle, Fig. 2 (not shown). The transmitter carried by the driver may be a transponder, Fig. 3 (not shown). <IMAGE> |
