ELECTRONIC SECURITY SYSTEM FOR A MOTOR VEHICLE

摘要

A security system for automatically disabling an interruptable circuit vital to the operation of a motor vehicle after an ignition of the vehicle is turned off or disabled. The security system includes a base circuit (100) with a relay (160) for disabling the interruptable circuit after the ignition is disabled. The base circuit (100) includes a logic circuit (150) that detects when the ignition is disabled, and for sending a disable signal to the relay (160). In one embodiment, the base circuit (100) includes a timer circuit (140) for delaying the disabled signal to the relay (160) for a specified interruptable circuit, and the disabled motor vehicle, may be enabled upon actuation of a remote transmitter (300), or switch (sw1) on the base circuit (100). The base circuit (100) also includes adapters (40-45) for connecting the base circuit to the interruptable circuit and to a power supply of the motor vehicle at a fuse panel of the motor vehicle. In an alternative embodiment, the interruptable circuit and the power supply are coupled to the base circuit (100) by splicing a wire of the interruptable cicuit and the power supply circuit, and coupling the spliced wire, with another adaptor, to the base circuit (100). The security system also includes an optional vibration detector (200) for detecting motion of the vehicle and a siren circuit for sounding an audible alarm in response to the detection of vibration by the vibration detector (200).