Boiloff for a flexible fuel compensation system
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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Abstract
A flexible fuel compensation system including a method of methanol boil-off compensation. The methanol boil-off compensation method includes an initialization routine, a run mode routine and a shutdown routine. The method will monitor a plurality of flags to determine when the methanol boil-off compensation should be used.
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Citations
5 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5)
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Specification