Method and system for determining level of fuel
First Claim
1. A system for determining a level of fuel contained in a tank of a motor vehicle containing both fuel and fuel vapor, the system comprising:
- a fuel pump disposed in the tank and for creating a flow of fuel in the tank;
an elongated tube placed vertically in the tank;
a venturi tube coupled between the fuel pump and the elongated tube for creating a vacuum as a result of a portion of the flow of fuel therethrough from the fuel pump thereby drawing fuel vapor from the elongated tube at a varying pressure, the pressure decreasing as the amount of fuel vapor in the tank increases, and a controller coupled to the elongated tube for determining the level of fuel in the tank based on the pressure.
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0 Petitions
Accused Products
Abstract
A method and system for determining the level of fuel contained in the tank of a motor vehicle includes a fuel pump disposed in the tank for creating a flow of fuel in the tank. An elongated tube is placed vertically in the tank. The system also includes a venturi tube coupled between the fuel pump and the elongated tube for creating a vacuum as a result of a portion of the flow of fuel therethrough from the fuel pump thereby drawing fuel vapor from the elongated tube at a varying pressure, the pressure decreasing as the amount of fuel vapor in the tank increases. A controller is coupled to the elongated tube for determining the level of fuel in the tank based on the pressure.
10 Citations
10 Claims
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1. A system for determining a level of fuel contained in a tank of a motor vehicle containing both fuel and fuel vapor, the system comprising:
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a fuel pump disposed in the tank and for creating a flow of fuel in the tank;
an elongated tube placed vertically in the tank;
a venturi tube coupled between the fuel pump and the elongated tube for creating a vacuum as a result of a portion of the flow of fuel therethrough from the fuel pump thereby drawing fuel vapor from the elongated tube at a varying pressure, the pressure decreasing as the amount of fuel vapor in the tank increases, and a controller coupled to the elongated tube for determining the level of fuel in the tank based on the pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for determining a level of fuel contained in a tank of a motor vehicle containing both fuel and fuel vapor, the method comprising:
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creating a flow of fuel in the tank;
creating a vacuum as a result of a portion of the flow of fuel flowing through a venturi tube thereby drawing fuel vapor from the fuel tank at a varying pressure, the pressure decreasing as the amount of fuel vapor in the tank increases, and determining the level of fuel in the tank based on the pressure. - View Dependent Claims (10)
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Specification