Automatic electronic and mechanical system to avoid vehicle theft

Claim 1

An automatic vehicle anti-theft system having an anti-theft mode and an anti-hijack mode, for a vehicle having both an ignition switch S 1 and an open door switch S 3 for a door, comprising in combination; (a) an electrically controlled fuel supply system 53 supplied with switched electrical current by said ignition switch S 1; (b) a momentary switch S 2 supplied with switched electrical current by said ignition switch S 1; (c) an electronic valve between said electrically controlled fuel supply system 53 and the ground; (d) said electronic valve normally closed and opened by a voltage applied to its gate and remaining open thereafter; (e) said momentary switch S 2 supplying a voltage to the gate of said electronic valve to open said electronic valve whenever said ignition switch is on; (f) said electronic valve operating said electrically controlled fuel supply system 53 when said ignition switch S 1 is closed and then said momentary switch S 2 is thereafter closed; (g) said open door switch S 3 open when the door is closed and closed when said door is open; (h) said open door switch S 3 controlling said electronic valve to close said electronic valve when said open door switch S 3 is closed; (i) an open door override switch S 4 to selectively disable said open door switch S 3 and to disable said anti-hijack mode; and, (j) a valet parking override switch S 5 to selectively disable the anti-theft mode while the vehicles in the valet mode;