Self-set vehicle anti-theft/anti-hijacking system with partial disablement followed by complete shutdown
First Claim
1. An automatically operated vehicle anti-hijacker/anti-theft vehicle security system comprising:
- a sensor relay;
a plurality of sensor inputs for said sensor relay, each sensor input having the capability of momentarily energizing said sensor relay;
a latching circuit for holding said sensor relay in said energized condition;
primary reset means operable to interrupt said latching circuit and restore said sensor relay to its deenergized condition;
a voltage bus connected to said sensor relay and energized only when said sensor relay is energized;
main and secondary timers connected to said voltage bus to commence main and secondary timing cycles, respectively, upon energization of said voltage bus, said main and secondary timers controlling a main output control relay and a secondary output control relay, respectively, with said main timing cycle being longer than said secondary timing cycle, said secondary output control relay having an output circuit for energizing an intermittent control relay when said second timer actuates said secondary output control relay;
intermittent means in circuit between said secondary output control relay and said intermittent control relay to cause rapid intermittent operation of said intermittent relay; and
circuit means for routing the engine distributor voltage or EFI control voltage intermittently in a series path to the engine ignition and/or EFI modules through a switching output on said intermittent control relay and normally closed contacts on said main output control relay, whereby engine operation is sharply reduced in power until said main timer energizes the main control relay to open said normally closed distributor voltage contacts on said main output control relay to shut down engine operation completely by opening the circuit to the distributor or EFI modules.
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Accused Products
Abstract
An anti-hijacking and anti-theft vehicle security protection system is designed to permit, in the anti-hijacker function, the hijacker to drive off with the vehicle but within about two minutes the engine will be partially disabled to permit maneuvering the vehicle out of traffic to the side of the road. A few minutes later, the engine will be totally disabled and signalling devices can be activated. The system employs two overlapped timers under control of a sensor relay. A reset button under control of an authorized user can deenergize the sensor relay to return the system to normal. Also included within the design is anti-theft protection for an unattended vehicle which can be selected to function in any one of 3 conditions, one condition being the anti-hijacking function. In the second condition, operation of the vehicle is first partially disabled and then completely shut off. In the third condition, the vehicle cannot be started, and hazard lights and alarm are activated.
27 Citations
15 Claims
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1. An automatically operated vehicle anti-hijacker/anti-theft vehicle security system comprising:
- a sensor relay;
a plurality of sensor inputs for said sensor relay, each sensor input having the capability of momentarily energizing said sensor relay;
a latching circuit for holding said sensor relay in said energized condition;
primary reset means operable to interrupt said latching circuit and restore said sensor relay to its deenergized condition;
a voltage bus connected to said sensor relay and energized only when said sensor relay is energized;
main and secondary timers connected to said voltage bus to commence main and secondary timing cycles, respectively, upon energization of said voltage bus, said main and secondary timers controlling a main output control relay and a secondary output control relay, respectively, with said main timing cycle being longer than said secondary timing cycle, said secondary output control relay having an output circuit for energizing an intermittent control relay when said second timer actuates said secondary output control relay;
intermittent means in circuit between said secondary output control relay and said intermittent control relay to cause rapid intermittent operation of said intermittent relay; and
circuit means for routing the engine distributor voltage or EFI control voltage intermittently in a series path to the engine ignition and/or EFI modules through a switching output on said intermittent control relay and normally closed contacts on said main output control relay, whereby engine operation is sharply reduced in power until said main timer energizes the main control relay to open said normally closed distributor voltage contacts on said main output control relay to shut down engine operation completely by opening the circuit to the distributor or EFI modules. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- a sensor relay;
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13. A method for protecting a motor vehicle from theft comprising:
- providing a sensor relay responsive to a plurality of sensor inputs detecting door opening and engine starting to latch said sensor relay in an energized state;
providing a main and secondary timer simultaneously energized with said sensor relay, the time cycle of said main timer being longer than said secondary timer;
providing a main output control relay and a secondary output control relay connected to said main and secondary timers, respectively;
connecting an intermittently operated control relay to said secondary output control relay to be operated in an intermittent manner when said secondary output control relay is energized;
routing the engine distributor voltage or EFI control voltage in a series path to the engine ignition or EFI modules through a switching output on said intermittent control relay and normally closed contacts on said main output control relay whereby said motor vehicle is operative in a partially disabled manner until said main timer operates to energize the main output control relay to terminate operation of the vehicle. - View Dependent Claims (14, 15)
- providing a sensor relay responsive to a plurality of sensor inputs detecting door opening and engine starting to latch said sensor relay in an energized state;
Specification