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Regeneration of Evaporative Emision Control System for Plug-in Hybrid Vehicle

  • US 20090084363A1
  • Filed: 07/30/2008
  • Published: 04/02/2009
  • Est. Priority Date: 09/27/2007
  • Status: Abandoned Application
First Claim
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1. A method of operating a fuel evaporative emission control system in a plug-in hybrid vehicle driven by a battery powered electric motor with a supplemental gasoline engine powered-electric generator operated on-demand for supplemental electric power for the vehicle, where the vehicle comprises a gasoline fuel tank, a fuel vapor vent passage from the fuel tank to a fuel vapor adsorption canister with a fuel vapor adsorbing material, a first air and fuel vapor flow passage from the canister for venting the canister and for introduction of purge air to the canister to purge fuel vapor from the canister, and a second air and fuel vapor flow passage from the canister for passage of purge air and purged fuel vapor from the canister to an air induction system of the engine, the method comprising:

  • tracking the flow of fuel vapor from the fuel tank to the fuel vapor adsorption canister; and

    when the fuel content of the canister exceeds a predetermined levelselectively heating the fuel vapor adsorbing material of the adsorption canister with microwave radiation to purge fuel vapor from the canister back through the fuel vapor vent passage into the fuel tank.

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