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Fuel management system for very high efficiency flex fuel engines powered by methanol and gasoline

  • US 8,677,949 B2
  • Filed: 12/28/2009
  • Issued: 03/25/2014
  • Est. Priority Date: 11/12/2007
  • Status: Active Grant
First Claim
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1. A fuel management engine system for a turbo-charged or supercharged spark engine comprising:

  • an engine;

    a source of alcohol;

    manifold structure for direct injection of the alcohol into the engine;

    a reformer;

    valve structure for delivering a portion of the alcohol to the reformer for generating a hydrogen-rich gas at lower engine torque values wherein the hydrogen-rich gas is introduced into the engine to extend limit of lean operation; and

    a fuel management control unit operating the engine at a substantially stoichiometric fuel/air ratio during part of a drive cycle and at a lean fuel/air ratio during other parts of the drive cycle.

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