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Boiloff for a flexible fuel compensation system

  • US 5,520,162 A
  • Filed: 04/17/1995
  • Issued: 05/28/1996
  • Est. Priority Date: 05/04/1993
  • Status: Expired due to Term
First Claim
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1. A method of compensating for methanol boil-off of a fuel mixture supplied by fuel injectors to an internal combustion engine, said method comprising the steps of:

  • initializing said method;

    calculating a fuel injector pulsewidth value using adaptive memory update rates;

    determining if a manifold absolute pressure value is less than an oxygen sensor value;

    holding an oxygen sensor timer at its current value if the manifold absolute pressure value is less than the oxygen sensor value; and

    adjusting the fuel mixture being sent by fuel injectors to the internal combustion engine based on the fuel injector pulsewidth value to maximize efficiency of the internal combustion engine.

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