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Reductant Injection Control System

  • US 20130031890A1
  • Filed: 08/05/2011
  • Published: 02/07/2013
  • Est. Priority Date: 08/05/2011
  • Status: Active Grant
First Claim
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1. A control system for reducing nitrogen oxides in an engine exhaust of an engine, the control system comprising:

  • an emissions catalyst having an inlet adapted to receive an exhaust from the engine;

    a reductant tank that stores a reductant;

    an injector in fluid communication with the reductant tank and operable to inject the reductant into the exhaust upstream of the catalyst;

    a reductant pump that pumps the reductant from the reductant tank to the injector; and

    a controller that determines a target pressure of the reductant based on an engine operating condition and operates the reductant pump to supply the target pressure.

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