Apparatus and method for disabling an internal combustion engine from a remote location

Claim 1

A security system for a vehicle having an internal combustion engine comprising: an alarm system comprising: a battery, an alarm motor, a key switch, an electronic control module, a siren; wherein said alarm motor is electronically linked to said electronic control module; said electronic control module comprises means for activating and deactivating said alarm motor; said key switch electronically linked to said alarm motor and said electronic control module; wherein said key switch comprises means for turning said electronic control module on and off, and means for testing installation comprising means for activating said siren when said key switch is in a lock position and a voltage drop is being caused by (a) opening a door-dome light, a courtesy light, a trunk light or a glove door; (b) turning on the ignition or headlights; or (c) stepping on a brake light; said battery electronically linked to said siren, said key switch and said electronic control module being rechargeable by an alternator terminal; a hand-held transmitter for transmitting a signal to an on-board receiver electronically linked to said battery, said key switch, said electronic control module and said siren; wherein said receiver comprising: means for remotely cutting off said ignition and turning on said alarm system and setting the alarm system to an alarm mode by pressing a button of said hand-held transmitter by an operator; means for remotely turning on said ignition and shutting off said alarm system when said button of said hand-held transmitter is pressed again by said operator; during said alarm mode, said control module comprises an induction portion, and means to detect a voltage drop or any drop in current flow from the battery in said vehicle, a battery cable passing through said control module for providing said current flow, means for activating said alarm motor and said siren and ground out the battery in response to a predetermined drop in said current flow; wherein said predetermined drop in said current flow is caused by opening a hood of said vehicle, or opening a door, or opening a trunk, or turning on the ignition or headlights, or stepping on a brake, or when a load is put across the battery; wherein said key switch mounted in a vehicle fender or hidden behind the vehicle grille; and said electronic control module comprising in series a capacitor, two transistors and a silicon controlled rectifier connected to said alarm motor.