Method for Determining Fuel Volatility and Consequently Performing Cold Starting of an Internal Combustion Engine
First Claim
1. Method for determining fuel volatility and consequently performing cold starting of an internal combustion engine, the method comprises the steps of:
- determining an enrichment percentage (% Enrich) as a function of a stored value (Vmem) for fuel volatility;
starting the engine using the previously determined enrichment percentage (% Enrich);
determining a predicted value (MarkPred) for starting quality before performing starting;
determining a measured value (MarkMeas) for starting quality during an initial rise in the speed (RPM) of the engine;
determining a correction value (Vcorr) of the stored value (Vmem) for fuel volatility as a function of the comparison between the measured value (MarkMeas) for starting quality and the predicted value (MarkPred) for starting quality; and
updating the stored value (Vmem) for fuel volatility by applying the correction value (Vcorr) to said stored value (Vmem).
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Accused Products
Abstract
A method for determining fuel volatility and consequently performing cold starting of an internal combustion engine; in the event of cold starting, the method provides for the determination of an enrichment percentage as a function of a stored value for fuel volatility; the determination of a predicted value for starting quality before performing starting; the starting of the engine using the previously determined enrichment percentage; the determination of a measured value for starting quality; the determination of a correction value of the stored value for fuel volatility as a function of the comparison between the measured value for starting quality and the predicted value for starting quality; and the updating of the stored value for fuel volatility by applying the correction value to said stored value, so consequently modifying the amount of enrichment in force.
20 Citations
86 Claims
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1. Method for determining fuel volatility and consequently performing cold starting of an internal combustion engine, the method comprises the steps of:
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determining an enrichment percentage (% Enrich) as a function of a stored value (Vmem) for fuel volatility; starting the engine using the previously determined enrichment percentage (% Enrich); determining a predicted value (MarkPred) for starting quality before performing starting; determining a measured value (MarkMeas) for starting quality during an initial rise in the speed (RPM) of the engine; determining a correction value (Vcorr) of the stored value (Vmem) for fuel volatility as a function of the comparison between the measured value (MarkMeas) for starting quality and the predicted value (MarkPred) for starting quality; and updating the stored value (Vmem) for fuel volatility by applying the correction value (Vcorr) to said stored value (Vmem). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86)
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Specification