Antitheft system
First Claim
1. Antitheft system for a vehicle provided with an engine, engine operating control means having a first state in which the engine is operable and a second state in which the engine is disabled, and a door movable between an open position and a closed position, the antitheft system having an armed condition and an unarmed condition and comprising:
- means for generating a control signal; and
means on the vehicle responsive to said control signal, said responsive means being operable to sense the state of the engine control means, the position of the door and the condition of the antitheft system, and said responsive means further being operable to;
(i) arm the antitheft system in response to said control signal when the antitheft system is unarmed, the door is closed and the engine control means is in the second state, (ii) disarm the antitheft system in response to said control signal when the antitheft system is armed, and (iii) produce an alarm condition in response to said control signal when the engine control means is in the first state, the door is open and the antitheft system is unarmed, the production of said alarm condition including converting the engine control means to the second state to disable the engine.
1 Assignment
0 Petitions
Accused Products
Abstract
An antitheft vehicle protection system has a remote control unit with which separate messages can be sent to a vehicle mounted protection device. The protection device, a portion of which is placed in a favorable location inside the vehicle such as near a windshield, monitors a variety of vehicle conditions such as the status of door locks, the status of an engine operation control circuit, the insertion of an ignition key and the integrity of the power circuit leading to the antitheft system. One of the messages is decoded as representative of a robbery in progress when certain other alarm conditions such as an open driver'"'"'s door and a running engine exist. The other message is decoded as representative of a panic condition. Both messages can result in audible alarms. In case of the alarm indicative of a robbery in progress, a delay is interposed to enable a sufficient distance between driver and robber to be achieved before an alarm condition such as an engine lock out is established. A sabotage detection scheme is employed to sense unauthorized tampering with the power supply circuits. An ultrasonic sensor is used to detect unauthorized vehicle entry.
90 Citations
21 Claims
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1. Antitheft system for a vehicle provided with an engine, engine operating control means having a first state in which the engine is operable and a second state in which the engine is disabled, and a door movable between an open position and a closed position, the antitheft system having an armed condition and an unarmed condition and comprising:
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means for generating a control signal; and means on the vehicle responsive to said control signal, said responsive means being operable to sense the state of the engine control means, the position of the door and the condition of the antitheft system, and said responsive means further being operable to;
(i) arm the antitheft system in response to said control signal when the antitheft system is unarmed, the door is closed and the engine control means is in the second state, (ii) disarm the antitheft system in response to said control signal when the antitheft system is armed, and (iii) produce an alarm condition in response to said control signal when the engine control means is in the first state, the door is open and the antitheft system is unarmed, the production of said alarm condition including converting the engine control means to the second state to disable the engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. Antitheft system for a motor vehicle having an engine and an engine operating control circuit comprising:
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means for generating a control signal to activate an antirobbing function; means in the vehicle for sensing at least first and second vehicle operation conditions, one of said conditions being associated with a vehicle segment on the driver'"'"'s side of the vehicle, and a second condition being associated with the operational status of the engine operating control circuit; means in the vehicle for detecting said control signal and in response thereto producing an alarm condition when a predetermined state of said at least first and second vehicle operating conditions has occurred; means for ultrasonically sensing an alarm condition inside the vehicle and producing an alarm indication thereof; means for enabling the antitheft system and generating an indication that the antitheft system is armed; and a housing mounted on the upper part of the front windshield of the vehicle, said housing including said means for ultrasonically sensing and said means for detecting said control signal.
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Specification