| 摘要 |
The security system comprises a portable transmitter unit 30 having a transmitter circuit (36, Fig. 2) a power source (40), and a receiver coil 34 or photocell (52, Fig. 3) for receiving signals from a transmitter coil 22 or an infra-red radiation source (50, Fig. 3) mounted on the vehicle near the ignition lock 26. The transmitter circuit includes an electronic switch (44, Fig. 2) operated upon receipt of a coded signal from the coil 22 or radiation source to connect the power source (40) to a radio frequency transmitter (42) thereby to send a re-mobilize signal to a security control unit 10 on the vehicle. The power source is also connected to the receiver coil 34 or photocell so that, when a continuous low power signal is transmitted by the transmitter coil, power from that signal can be used to recharge the power source. The transmitter (42, Fig. 2) may be operated by a button-actuated switch (44) for vehicle door locking and unlocking. The unit 10 immobilizes the engine fuel injection system 15. The transmitter unit (230, Fig. 4) may include a microprocessor-controlled transmitter (242), the microprocessor (236) and transmitter having separate batteries (240, 241) powered from a receiver coil (234). <IMAGE> |
