Method and system for determining the volatility of a fuel
First Claim
1. A method for determining the volatility of fuel in a fuel storage system, the method comprising:
- determining that a refueling event has occurred and that the fuel storage system has subsequently been sealed;
performing, by means of a pressure sensor in the fuel storage system, a first pressure measurement in the fuel storage system at a first time after the determining;
performing, by means of the pressure sensor, a second pressure measurement in the fuel storage system at a second time, the second time occurring after the first time;
determining, by means of a controller, a pressure evolution rate from the first pressure measurement at the first time and the second pressure measurement at the second time; and
deriving an estimation of the volatility of the fuel from said pressure evolution rate.
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Abstract
A method for determining the volatility of fuel in a fuel storage system which entails: determining that a refueling event has occurred (210) and that the fuel storage system has subsequently been sealed (220); performing a first pressure measurement (230) at a first time after the determining; performing a second pressure measurement (240) at a second time, the second time occurring after the first time; determining a pressure evolution rate (250) from the first pressure measurement at the first time and the second pressure measurement at the second time; and deriving an estimation (260) of the volatility of the fuel from the pressure evolution rate.
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Citations
18 Claims
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1. A method for determining the volatility of fuel in a fuel storage system, the method comprising:
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determining that a refueling event has occurred and that the fuel storage system has subsequently been sealed; performing, by means of a pressure sensor in the fuel storage system, a first pressure measurement in the fuel storage system at a first time after the determining; performing, by means of the pressure sensor, a second pressure measurement in the fuel storage system at a second time, the second time occurring after the first time; determining, by means of a controller, a pressure evolution rate from the first pressure measurement at the first time and the second pressure measurement at the second time; and deriving an estimation of the volatility of the fuel from said pressure evolution rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for determining the volatility of fuel in a fuel storage system, the method comprising:
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determining, by means of a sensor of a level of fuel in the fuel storage system, that a refueling event has occurred and determining that the fuel storage system has subsequently been sealed; performing, by means of a pressure sensor in the fuel storage system, a first pressure measurement in the fuel storage system at a first time after the determining; performing, by means of the pressure sensor, a second pressure measurement in the fuel storage system at a second time, the second time occurring after the first time; determining, by means of a controller, a pressure evolution rate from the first pressure measurement at the first time and the second pressure measurement at the second time; and deriving a reid vapor pressure of the fuel from said pressure evolution rate. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification