Piezo based energy harvesting for E-latch systems

A vehicle door includes an electrically-powered latch and a user input feature that can be actuated by a user to cause the electrically-powered latch to unlatch. An electrical energy storage device is operably connected to the electrically-powered latch, and a piezoelectric device is mounted to the...

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Bibliographische Detailangaben
Hauptverfasser:	Patel, Rajesh K, Papanikolaou, Kosta
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR ELECTRICITY FIXED CONSTRUCTIONS GENERATION HANDCUFFS KEYS LOCKS PERFORMING OPERATIONS REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FORVEHICLES SAFES TRANSPORTING VEHICLES IN GENERAL WINDOW OR DOOR FITTINGS WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILARDEVICES FOR VEHICLES
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Beschreibung
Zusammenfassung:	A vehicle door includes an electrically-powered latch and a user input feature that can be actuated by a user to cause the electrically-powered latch to unlatch. An electrical energy storage device is operably connected to the electrically-powered latch, and a piezoelectric device is mounted to the door. The piezoelectric device can be manually actuated by a user to charge the electrical energy storage device, and electrical energy from the electrical energy storage device can be utilized to actuate the electrically-powered latch to thereby unlatch the latch. The user input feature may comprise a switch or sensor located adjacent a door handle/latch release on an inside and/or an outside of the vehicle door. The electrical energy storage device may comprise an emergency battery, capacitor, or other electrical device.