RF remote system with drive-away prevention
First Claim
1. A security system for preventing unauthorized activation and for providing remote function actuation of a vehicle, the system comprising:
- a fob transmitter for transmitting coded signals to prevent unauthorized activation and for providing remote function actuation of the vehicle having an initiation signal, said fob transmitter comprising;
a first microprocessorfor generating a first coded signal to remotely actuate a function within the vehicle; and
for generating a second coded signal, to secure the vehicle, in response to receiving a power signal;
a first coil for receiving said power signal;
a first circuit for transmitting said first and second coded signals;
a receiver for receiving said coded signals to prevent unauthorized activation of the vehicle, and for initiating actuation of a vehicle function remotely, said receiver comprising;
a second circuit for receiving said first and said second coded signal;
a second coil for coupling with said first coil to transmit said power signal to said first coil in response to receiving the initiation signal; and
a second microprocessorfor determining the validity of said received first coded signal, and for initiating the function remotely being actuated within the vehicle if said received first coded signal is valid; and
for determining the validity of said received second coded signal, and for securing the vehicle by generating an activation signal if said received second coded signal is valid.
12 Assignments
0 Petitions
Accused Products
Abstract
A drive-away prevention security system used in connection with an RF remote keyless entry system. A microprocessor and associated circuitry are configured within the head of an ignition key for a vehicle such that when a function switch on the key head is activated, a coded signal is transmitted to be received by a receiver within the vehicle. The receiver deciphers the received coded transmission to determine if a valid signal has been transmitted, and performs a vehicle function, such as locking or unlocking the vehicle doors, if the coded signal is valid. When the ignition key is inserted in the ignition switch of the vehicle, an ignition signal is sent to a microprocessor associated with the receiver. The microprocessor causes an on/off signal to be applied to an oscillator at the ignition switch in accordance with a data scheme. The oscillator energizes a coil at the ignition switch that generates a time-varying magnetic field inductively coupling the magnetic field lines to the coil within the ignition key. The microprocessor in the key analyzes the data sequence transmitted by the time-varying magnetic field, and emits the coded signal if the time-varying magnetic field is valid. The receiver receives the coded beacon signal and causes a start/enable signal to be sent to an engine module if the signal is valid.
72 Citations
19 Claims
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1. A security system for preventing unauthorized activation and for providing remote function actuation of a vehicle, the system comprising:
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a fob transmitter for transmitting coded signals to prevent unauthorized activation and for providing remote function actuation of the vehicle having an initiation signal, said fob transmitter comprising; a first microprocessor for generating a first coded signal to remotely actuate a function within the vehicle; and for generating a second coded signal, to secure the vehicle, in response to receiving a power signal; a first coil for receiving said power signal; a first circuit for transmitting said first and second coded signals; a receiver for receiving said coded signals to prevent unauthorized activation of the vehicle, and for initiating actuation of a vehicle function remotely, said receiver comprising; a second circuit for receiving said first and said second coded signal; a second coil for coupling with said first coil to transmit said power signal to said first coil in response to receiving the initiation signal; and a second microprocessor for determining the validity of said received first coded signal, and for initiating the function remotely being actuated within the vehicle if said received first coded signal is valid; and for determining the validity of said received second coded signal, and for securing the vehicle by generating an activation signal if said received second coded signal is valid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A security system for providing vehicle drive-away prevention and remote actuation of a vehicle function, the vehicle having an activation signal, and the security system comprising:
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a remote fob transponder for transmitting coded signals to remotely actuate the vehicle function, and for transmitting coded signals to prevent unauthorized activation, said remote fob transponder comprising; a first coil for receiving a power signal, said power signal comprising an ID coded signal; a first microprocessor for generating a first coded signal to remotely actuate the vehicle function; and for determining the validity of said ID coded signal, and for generating a second coded signal, in response to said ID coded signal being valid, to secure the vehicle and provide drive-away prevention; a function switch for causing said first microprocessor to combine a vehicle function coded signal reflecting the vehicle function to be remotely actuated with said first coded signal; a first oscillating circuit for imposing said first and second coded signals onto a carrier frequency, and for transmitting said first and second coded signals; a transceiver for receiving coded signals to prevent unauthorized activation of the vehicle, and for initiating actuation of a vehicle function, said transceiver comprising; a second oscillator circuit for receiving said first and second coded signals, and for removing said carrier frequency from said first and second coded signals; a second coil for coupling with said first coil to transmit said power signal to said first coil in response to receiving the activation signal; a second microprocessor for comparing said received first coded signal with a first stored code to determine the validity of said received first coded signal, and for initiating the function remotely being actuated within the vehicle if said received first coded signal is valid; and for generating said ID coded signal with said power signal, for comparing said received first coded signal with a second stored code to determine the validity of said second coded signal, and for generating an ignition signal to secure the vehicle if said second coded signal is valid. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A remote function actuation and drive away prevention security system for a vehicle having an activation signal, the system comprising:
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an ignition key remote fob transponder for transmitting coded signals to remotely actuate a vehicle function, and for transmitting coded signals to prevent unauthorized activation of the vehicle, said ignition key remote fob transponder comprising; a first coil for receiving a power signal, said power signal comprising an ID coded signal; a first microprocessor for generating a first coded signal to remotely actuate the vehicle function; and for determining the validity of said ID coded signal, and for generating a second coded signal, in response to said ID coded signal being valid, to secure the vehicle and provide drive-away prevention; a remote function switch for causing said first microprocessor to combine a vehicle function coded signal reflecting the vehicle function to be remotely actuated with said first coded signal; and a first oscillating circuit for imposing said first and second coded signals onto a carrier frequency, and for transmitting said first and second coded signals; and an ignition assembly transceiver unit for receiving coded signals to prevent unauthorized activation of the vehicle, and for initiating actuation of the vehicle function, said transceiver unit comprising; a bobbin assembly comprising; a second oscillator circuit for receiving said first and second coded signals, and for removing said carrier frequency from said first and second coded signals; and a second coil, wound around a bobbin, for coupling with said first coil to transmit said power signal to said first coil in response to receiving the activation signal; and a second microprocessor for comparing said received first coded signal with a first stored code to determine the validity of said received first coded signal, and for initiating the function remotely being actuated within the vehicle if said received first coded signal is valid; and for generating said ID coded signal with said power signal, for comparing said received first coded signal with a second stored code to determine the validity of said second coded signal, and for generating an ignition signal if said second coded signal is valid; and an ignition switch system, having said bobbin assembly positioned thereabout for receiving said ignition signal to secure the vehicle. - View Dependent Claims (16, 17, 18, 19)
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Specification