Patent ID: 6629050
Filing Date: 2003-09-30
Classification: B60R

Abstract:
A theft-deterrence system for a vehicle having a direct current power transmission circuit including a battery, and having an ignition switch that when in motion produces electrical activity on the direct current power transmission circuit, said theft-deterrence system comprising:a. an electrical activity sensor coupled to the direct current power transmission circuit, said electrical activity sensor having an electrical activity sensor output producing an electrical activity output signal functionally related to a voltage detected on the direct current power transmission circuit; b. a battery-disconnect switch electrically interposed in the direct current power transmission circuit; and c. a controller, including an input, an output and a system state register, the input of said controller being electrically coupled to the electrical activity sensor output and the output of said controller being electrically coupled to said battery-disconnect switch, said controller analyzing the electrical activity output signal of said electrical activity sensor to identify when the electrical activity output signal contains an electrical signature of an ignition switch in motion, and said controller calculating a theft-deterrence value based on analyzing the electrical activity and transmitting a battery-disabling signal to said battery-disconnect switch when the theft-deterrence value surpasses a predetermined battery-disconnect threshold level.