Device for determining fuel quality and corresponding method
First Claim
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1. A device for determining the quality of fuel for an internal combustion engine, comprising:
- a pressure sensor for measuring the pressure in a fuel container;
a temperature sensor for measuring the temperature in a fuel container; and
an evaluation unit with inputs that are connected to the pressure sensor and the temperature sensor, for determining a quality value representing the fuel quality, wherein the evaluation unit determines the quality value as a function of the temperature and the pressure in the fuel container in that the evaluation unit, derives the quality value therefrom,wherein the evaluation unit comprises a first processing unit which has inputs that are connected to the pressure sensor and the temperature sensor and which determines, as a function of the pressure and temperature in the fuel container, a gas emission characteristic value representing the gas emission behavior of the fuel, andthe evaluation unit comprises a second processing unit which has an input that is connected to the first processing unit and which determines the quality value of the fuel as a function of the gas emission characteristic value, whereinthe first processing unit comprises a differentiator which determines the rate of change in the pressure in the fuel container.
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Abstract
The invention relates to a device for determining the quality of fuel for an internal combustion engine, comprising a pressure sensor (1) for determining the pressure (p) inside a fuel tank and/or comprising a temperature sensor (4) for determining the temperature (T) inside a fuel tank. According to the invention, an evaluation unit (5) is provided for determining a quality value (Q), which depicts die quality of the fuel, based on the temperature (T) and/or the pressure (p) inside the fuel tank. Said evaluation unit is connected on the input side to the pressure sensor (1) and/or to the temperature sensor (4).
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Citations
9 Claims
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1. A device for determining the quality of fuel for an internal combustion engine, comprising:
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a pressure sensor for measuring the pressure in a fuel container; a temperature sensor for measuring the temperature in a fuel container; and an evaluation unit with inputs that are connected to the pressure sensor and the temperature sensor, for determining a quality value representing the fuel quality, wherein the evaluation unit determines the quality value as a function of the temperature and the pressure in the fuel container in that the evaluation unit, derives the quality value therefrom, wherein the evaluation unit comprises a first processing unit which has inputs that are connected to the pressure sensor and the temperature sensor and which determines, as a function of the pressure and temperature in the fuel container, a gas emission characteristic value representing the gas emission behavior of the fuel, and the evaluation unit comprises a second processing unit which has an input that is connected to the first processing unit and which determines the quality value of the fuel as a function of the gas emission characteristic value, wherein the first processing unit comprises a differentiator which determines the rate of change in the pressure in the fuel container. - View Dependent Claims (2, 3)
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4. A method for determining the quality of fuel for an internal combustion engine, comprising:
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measuring pressure and/or temperature in a fuel container, while the fuel is in a fuel container; determining a quality value representing the fuel quality, wherein the quality value is determined as a function of the measured temperature and the measured pressure in the fuel container in that the quality value is derived therefrom; determining a gas emission characteristic value, representing the gas emission behavior of the fuel as a function of the temperature and the pressure in the fuel container; determining the quality value of the fuel as a function of the gas emission characteristic value determined for the fuel; determining the rate of change in pressure in the fuel container; and
determining the gas emission characteristic value as a function of the rate of change in pressure in the fuel container. - View Dependent Claims (5, 6, 7, 8, 9)
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Specification