Burglarproofing device for automotive vehicles
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsWalter Weishaupt, Hans-Dieter Fournell
Life of this patent
Estimating the term…
Abstract
A burglarproofing device for vehicles is provided wherein a key contains two partial codes. Device on the vehicle compares at least one of the two partial codes with a stored code. Coincidence of the codes will unlock a central locking device. A partial code may be changed by the authorized owner, although the vehicle is locked.
Claims18
Burglarproofing device for automotive vehicles with a code transmitter for a settable code, with a code storage unit for a stored code corresponding to the settable code, with a code reader, and with a code comparator, which latter makes it possible to use the automotive vehicle in case of coincidence between the settable code and the stored code, characterized in that the stored code consists of two partial codes, of which the first partial code can be re-stored in the rest condition of the device and upon coincidence of the second partial code with the corresponding partial code of the code transmitter.
In a burglarproofing system employing first, second, third and fourth partial codes for locking and unlocking a central locking mechanism for a vehicle, the method of
- storing first and second partial codes,
- receiving third and fourth partial codes,
- comparing said first and third partial codes for coincidence,
- comparing said second and fourth partial codes for coincidence, producing a first output upon coincidence being established in said comparison steps, and unlocking said central locking mechanism in response to said output.
Dependencies are inferred from the claim text.