FUEL IDENTIFICATION BASED ON CRANKSHAFT ACCELERATION
First Claim
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1. A method for an engine, comprising:
- adjusting fuel injection to the engine based on a fuel alcohol content identified from crankshaft acceleration.
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Abstract
Systems and methods for identifying alcohol content of a fuel in an engine. In one example approach, a method comprises adjusting fuel injection to the engine based on fuel alcohol content identified from crankshaft acceleration. For example, the crankshaft acceleration may be generated by modulating an air/fuel ratio in a selected cylinder across a range of air/fuel ratios while keeping the engine at stoichiometry.
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Citations
20 Claims
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1. A method for an engine, comprising:
adjusting fuel injection to the engine based on a fuel alcohol content identified from crankshaft acceleration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for an engine comprising:
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generating crankshaft accelerations by modulating an air/fuel ratio in a cylinder across a range of air/fuel ratios while keeping the engine at stoichiometry; identifying a fuel alcohol content based on a slope or shape of a mapping of the crankshaft accelerations versus the modulated air/fuel ratios. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A system for an engine comprising:
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a controller configured to; adjust fuel injection to the engine based on a fuel alcohol content identified from crankshaft acceleration. - View Dependent Claims (19, 20)
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Specification