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System and method of control of internal combustion engine using methane fuel mixture

  • US 4,995,367 A
  • Filed: 06/29/1990
  • Issued: 02/26/1991
  • Est. Priority Date: 06/29/1990
  • Status: Expired due to Term
First Claim
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1. A system for controlling an internal combustion engine operating on a fuel mixture of gasoline and methanol, comprising:

  • a fuel sensor for detecting the mixture ratio (P) of methanol to gasoline in the fuel mixture to be supplied to said internal combustion engine;

    at least one fuel injector for supplying a metered amount of fuel mixture at periodic intervals to a cylinder of said internal combustion engine; and

    a control unit for controlling said fuel injector, including;

    (1) means for calculating an air/fuel ratio (A/F) according to the following relationship;

    
    
    space="preserve" listing-type="equation">A/F=14.8-0.0853P(2) means for determining a fuel injector opening time period based on said calculated air/fuel ratio; and

    (3) means for periodically actuating said fuel injector based on said determined fuel injector opening time.

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