Method to determine the composition of a fuel mixture
First Claim
1. A method of determining a composition of a fuel mixture from a first fuel and at least a second fuel for operation of an internal combustion engine having at least a combustion chamber, wherein the first fuel and at least the second fuel have different boiling points or different enthalpies of evaporation, the method comprising:
- determining a pressure in the combustion chamber;
determining a parameter associated with the pressure in the combustion chamber;
determining a time history of the pressure in the combustion chamber;
determining a time history of a parameter associated with the pressure in the combustion chamber;
whereby the pressure and the parameter associated with the pressure and the time history of the pressure and the time history of a parameter associated with the pressure in the combustion chamber are determined during an injection of the fuel mixture into the combustion chamber or after an injection of the fuel mixture into the combustion chamber, wherein an injection of the fuel mixture occurs during a compression phase of a fuel-air mixture.
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Abstract
The invention concerns a method to determine the composition of a fuel mixture from a first and at least a second fuel for the operation of an internal combustion engine with at least one combustion chamber, wherein the first and the second fuel have different boiling points and/or different enthalpies of evaporation. Provision is thereby made for the composition of the fuel mixture to be ascertained from the pressure in the combustion chamber and/or a parameter associated with the pressure and/or the time history of the pressure and/or the time history of a parameter associated with the pressure during and/or after an injection of fuel during a compression phase of the fuel-air mixture. An advantage of the method according to the invention is that when initially starting the engine after filling the tank (fueling), the fuel mixture ratio, which resulted from the filling of the tank (fueling), can already hereby be determined.
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Citations
15 Claims
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1. A method of determining a composition of a fuel mixture from a first fuel and at least a second fuel for operation of an internal combustion engine having at least a combustion chamber, wherein the first fuel and at least the second fuel have different boiling points or different enthalpies of evaporation, the method comprising:
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determining a pressure in the combustion chamber; determining a parameter associated with the pressure in the combustion chamber; determining a time history of the pressure in the combustion chamber; determining a time history of a parameter associated with the pressure in the combustion chamber; whereby the pressure and the parameter associated with the pressure and the time history of the pressure and the time history of a parameter associated with the pressure in the combustion chamber are determined during an injection of the fuel mixture into the combustion chamber or after an injection of the fuel mixture into the combustion chamber, wherein an injection of the fuel mixture occurs during a compression phase of a fuel-air mixture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of using an internal combustion engine having at least a combustion chamber to determine a composition of a gasoline/ethanol fuel mixture, to distinguish between a diesel fuel and a biodiesel fuel, to distinguish between a winter fuel and a summer fuel, to determine a water content in ethanol, or to detect a filling of a tank with a wrong fuel added to a tank by the implementation of a method of determining a composition of a fuel mixture from a first fuel and at least a second fuel for the operation of an internal combustion engine having at least a combustion chamber, wherein the first fuel and at least a second fuel have different boiling points or different enthalpies of evaporation, the method comprising:
- determining a pressure in the combustion chamber;
determining a parameter associated with the pressure in the combustion chamber;
determining a time history of the pressure in the combustion chamber;
determining a time history of a parameter associated with the pressure in the combustion chamber;
whereby the pressure and the parameter associated with the pressure and the time history of the pressure and the time history of a parameter associated with the pressure in the combustion chamber are determined during an injection of the fuel mixture into the combustion chamber or after an injection of the fuel mixture into the combustion chamber, wherein an injection of the fuel mixture occurs during a compression phase of a fuel-air mixture.
- determining a pressure in the combustion chamber;
Specification