Motor vehicle having a central locking system and an anti-theft alarm system
First Claim
1. A motor vehicle central locking system and anti-theft alarm system wherein said motor vehicle has at least two doors and a closable and lockable trunk, said doors having key operated locks and being automatically lockable and unlockable by the central locking system via operating the key-operated locks and wherein access to the motor vehicle interior is monitored by the anti-theft alarm system, the central locking and alarm system comprising:
- a first group of switching contacts arranged in the key-operated locks for controlling the central locking system and for activating and deactivating the alarm ready state of the anti-theft alarm system during locking and unlocking of the key-operated locks, respectively;
an electro-optical display element arranged in locking buttons for displaying the alarm ready state via a flashing of said display element;
a second group of switching contacts, each of said contacts having an active and an inactive state wherein an alarm is triggered indicating access or unauthorized use of the motor vehicle by at least one of said second group of switching contacts changing from its inactive state to the active state;
a control unit for controlling both the central locking and anti-theft alarm system;
a third group of switching contacts indicating a locked and unlocked state of said doors and trunk for allowing said control unit to monitor the locked and unlocked state of said doors and trunk, wherein activation of the anti-theft alarm system is prevented and a warning signal is emitted via said electro-optical display element when said control unit recognizes that at least one signal indicating the locked state from at least one contact of said third group of switching contacts is absent after at least one key operation of said key-operated locks in a locking direction.
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Accused Products
Abstract
A motor vehicle including a central locking system as well as an anti-theft alarm system is controlled by a control unit common to both systems. The locked state and the unlocked state of all locks or doors of the motor vehicle are monitored by means of additional switching contacts and an activating of the alarm system is prevented if at least one of the locks is not in the locked state. An activating of the alarm ready state of the alarm system is nevertheless possible by operating a key-operated lock a certain number of times within a specific limited time period.
19 Citations
20 Claims
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1. A motor vehicle central locking system and anti-theft alarm system wherein said motor vehicle has at least two doors and a closable and lockable trunk, said doors having key operated locks and being automatically lockable and unlockable by the central locking system via operating the key-operated locks and wherein access to the motor vehicle interior is monitored by the anti-theft alarm system, the central locking and alarm system comprising:
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a first group of switching contacts arranged in the key-operated locks for controlling the central locking system and for activating and deactivating the alarm ready state of the anti-theft alarm system during locking and unlocking of the key-operated locks, respectively; an electro-optical display element arranged in locking buttons for displaying the alarm ready state via a flashing of said display element; a second group of switching contacts, each of said contacts having an active and an inactive state wherein an alarm is triggered indicating access or unauthorized use of the motor vehicle by at least one of said second group of switching contacts changing from its inactive state to the active state; a control unit for controlling both the central locking and anti-theft alarm system; a third group of switching contacts indicating a locked and unlocked state of said doors and trunk for allowing said control unit to monitor the locked and unlocked state of said doors and trunk, wherein activation of the anti-theft alarm system is prevented and a warning signal is emitted via said electro-optical display element when said control unit recognizes that at least one signal indicating the locked state from at least one contact of said third group of switching contacts is absent after at least one key operation of said key-operated locks in a locking direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification