CONTROL OF FLEET VEHICLES WITH COMMON TRANSMITTERS
First Claim
Patent Images
1. A method of controlling a fleet of vehicles with many different transmitters comprising the steps of:
- a) transmitting a signal utilizing a secret key common to transmitters authorized to command all vehicles within the fleet of vehicles;
b) determining if the signal is from a first group of transmitters authorized to command vehicles within the fleet of vehicles;
c) authorizing a limited level of vehicle command capability responsive to the signal being validated as being sent from a transmitter in the first group of transmitters;
d) determining if the signal belongs to a second group of transmitters authorized to command a second group of vehicles within the fleet; and
e) authorizing additional vehicle command capability greater than the limited level responsive to the signal being validated as being sent from a transmitter in the second group of transmitters.
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Abstract
A method of controlling fleet vehicles includes the steps of identifying transmitter signals from a select group and an entire group to allow selective operation of certain specific vehicle functions. The method also includes the step of reprogramming a secret key and storing the previous secret key such that transmitters that have not already been programmed can be programmed if they include the old secret key.
43 Citations
15 Claims
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1. A method of controlling a fleet of vehicles with many different transmitters comprising the steps of:
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a) transmitting a signal utilizing a secret key common to transmitters authorized to command all vehicles within the fleet of vehicles; b) determining if the signal is from a first group of transmitters authorized to command vehicles within the fleet of vehicles; c) authorizing a limited level of vehicle command capability responsive to the signal being validated as being sent from a transmitter in the first group of transmitters; d) determining if the signal belongs to a second group of transmitters authorized to command a second group of vehicles within the fleet; and e) authorizing additional vehicle command capability greater than the limited level responsive to the signal being validated as being sent from a transmitter in the second group of transmitters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of programming a vehicle immobilization system comprising the steps of:
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a) replacing a stored default secret key code within a vehicle controller and each of a plurality of corresponding key fobs with a first secret key code stored as a current key code, where the first secret key is different than the default secret key code; b) subsequently replacing the first secret key code within a vehicle controller and each of the plurality of corresponding key fobs with a second secret key code; c) storing the first secret key code within the vehicle controller as an old key code; d) recognizing and communicating with key fobs including the first secret key code with the vehicle controller; and e) replacing the first secret key code in the key fobs with the second secret key code. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification