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PIEZO BASED ENERGY HARVESTING FOR E-LATCH SYSTEMS

  • US 20160326779A1
  • Filed: 07/11/2016
  • Published: 11/10/2016
  • Est. Priority Date: 11/21/2013
  • Status: Active Grant
First Claim
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1. A vehicle door, comprising:

  • a door structure;

    a handle fixed to the door structure;

    an electrically-powered latch defining latched and unlatched states;

    a user input feature comprising a sensor actuated by a user and causing the electrically-powered latch assembly to change from the latched state to the unlatched state in order to unlatch the door such that the door can be unlatched without movement of the handle relative to the door structure;

    an electrical energy storage device that is operably connected to the electrically-powered latch;

    a piezoelectric device operably connected to the electrical energy storage device such that the piezoelectric device is manually actuated by a user to charge the electrical energy storage device; and

    wherein;

    electrical energy from the electrical energy storage device is utilized to actuate the electrically-powered latch to thereby unlatch the electronically-powered latch without movement of the handle relative to the door structure.

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