Apparatus for preventing unauthorized starting of a motor vehicle
First Claim
1. An arrangement for preventing an unauthorized starting of a motor vehicle, the arrangement including a data carrier with a key adapted to operate at least one of mechanical locks and ignition switch means of the motor vehicle and an evaluating circuit means for providing an output signal if data on the data carrier contains predetermined information, characterized in that the data carrier includes at least one of an unerasable portion containing data reflecting vehicle-related information and an erasable portion containing arbitrary information, the evaluating circuit means includes at least one read/write means for reading the data on the data carrier and for enabling a changing of the information on the erasable portion of the data carrier, and a comparison means for comparing the data read by the read/write means with specific data and for providing an output signal upon a coincidence between the read data and the specific data in the comparator means and for forwarding at least a pair of the vehicle-related information to a vehicle diagnostic system.
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Accused Products
Abstract
An arrangement for preventing an unauthorized starting of vehicles which includes a data carrier preferably connected to a key provided for mechanical locks of the motor vehicle and with an evaluating circuit triggering a signal if the correct information is introduced into the arrangement. The data carrier contains at least one of unerasable vehicle-related information or erasable arbitrary information. The evaluating circuit includes at least one read/write unit and a comparison unit wherein the total data of the data carrier are examined and which, in addition to the signal triggered if the information was recognized as correct, passes on the vehicle-related information at least partially to a terminal provided for one of external diagnostic systems or a diagnostic system provided in the vehicle.
76 Citations
26 Claims
- 1. An arrangement for preventing an unauthorized starting of a motor vehicle, the arrangement including a data carrier with a key adapted to operate at least one of mechanical locks and ignition switch means of the motor vehicle and an evaluating circuit means for providing an output signal if data on the data carrier contains predetermined information, characterized in that the data carrier includes at least one of an unerasable portion containing data reflecting vehicle-related information and an erasable portion containing arbitrary information, the evaluating circuit means includes at least one read/write means for reading the data on the data carrier and for enabling a changing of the information on the erasable portion of the data carrier, and a comparison means for comparing the data read by the read/write means with specific data and for providing an output signal upon a coincidence between the read data and the specific data in the comparator means and for forwarding at least a pair of the vehicle-related information to a vehicle diagnostic system.
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19. An arrangement having a carrier and for preventing unauthorized starting of a motor vehicle having at least a diagnostic system,
the method comprising providing a key with said carrier having unerasable data reflecting vehicle-related information and erasable data containing arbitrary information thereon, evaluating at least one of unerasable data reflecting vehicle-related information and erasable data containing arbitrary information, enabling a changing of the erasable data, comparing data from at least one of said unerasable and erasable data with specific data to produce an output signal in response to a determination that a predetermined relationship exists between said compared data, and forwarding at least a pair of unerasable data to said diagnostic system.
Specification