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NOx ELIMINATION INJECTOR FIRING CONTROL CIRCUIT

  • US 20110131960A1
  • Filed: 12/04/2009
  • Published: 06/09/2011
  • Est. Priority Date: 12/04/2009
  • Status: Active Grant
First Claim
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1. Art NOx injection system for treating a vehicle exhaust system comprising:

  • an injector for injecting a select material into the vehicle exhaust system and including an electrical coil; and

    an injector firing control circuit electrically connected to the injector for driving the coil comprising a switch selectively coupling a supply to the electrical coil, a flyback diode connected across the electrical coil and an impedance element connected in series with the flyback diode to increase reverse voltage to increase injector turn off response.

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