초록 ▼

A method and a device are provided for determining the amount of fuel in the fuel tank of a motor vehicle. The fuel tank has a main storage reservoir which is provided with a filling level meter for determining the respective fuel therein and a reserve reservoir which is of substantially smaller vol

A method and a device are provided for determining the amount of fuel in the fuel tank of a motor vehicle. The fuel tank has a main storage reservoir which is provided with a filling level meter for determining the respective fuel therein and a reserve reservoir which is of substantially smaller volume in comparison with the main storage reservoir, which is closed in itself, and which is supplied with fuel by a pump from the main storage reservoir. After the main storage reservoir is emptied, the fuel reserve which is then still contained in the reserve reservoir is calculated as the difference of a defined volume of the reserve reservoir (12) and the fuel consumption summed over time.

대표청구항 ▼

1. A method for determining the amount of fuel at any given time in a fuel tank of a motor vehicle, wherein the fuel tank has a main storage reservoir (34) provided with a filling level meter (56) for determining an amount of fuel contained therein and a reserve reservoir (12) having a substantially

1. A method for determining the amount of fuel at any given time in a fuel tank of a motor vehicle, wherein the fuel tank has a main storage reservoir (34) provided with a filling level meter (56) for determining an amount of fuel contained therein and a reserve reservoir (12) having a substantially smaller volume in comparison with a volume of the main storage reservoir (34), the reserve reservoir being closed in itself and being supplied with fuel by a pump (38) from the main storage reservoir (34), the method comprising calculating a residual volume of fuel disposed in the fuel tank at a given time on the basis of fuel consumption, calculating a fuel reserve which is still contained in the reserve reservoir (12) at a given time after emptying of the main storage reservoir (34) as a difference between a defined volume of the reserve reservoir (12) and the fuel consumption summed over time, and triggering a signal for establishing a moment in time from which determination of the fuel reserve in the reserve reservoir (12) by means of consumption calculation begins in dependence on the fuel falling below a given filling level in the reserve reservoir (12).