Keyless vehicle door latch system with powered backup unlock feature

A keyless door latch system for doors of motor vehicles includes a backup electrical power supply to unlock the door latch in the event the primary power supply fails, thereby eliminating the need for a lock cylinder. The latch system includes a user input device having first and second user input f...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Puscas Livianu Dorin, Krishnan Venkatesh
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE CHECKING-DEVICES FIXED CONSTRUCTIONS GENERATING RANDOM NUMBERS HANDCUFFS KEYS LOCKS PERFORMING OPERATIONS PHYSICS REGISTERING OR INDICATING THE WORKING OF MACHINES SAFES TIME OR ATTENDANCE REGISTERS TRANSPORTING VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR VOTING OR LOTTERY APPARATUS WINDOW OR DOOR FITTINGS
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Beschreibung
Zusammenfassung:	A keyless door latch system for doors of motor vehicles includes a backup electrical power supply to unlock the door latch in the event the primary power supply fails, thereby eliminating the need for a lock cylinder. The latch system includes a user input device having first and second user input features. The door latch system is configured to supply electrical power from the primary electrical power supply to unlock the latch upon actuation of the first user input feature, and to supply electrical power from the backup electrical power supply to unlock the latch upon actuation of the second user input feature. The user input device may comprise a wireless portable device that generates first and second wireless signals upon actuation of the first and second user input features, respectively.