Tank system of a motor vehicle comprising a volume-modifying element

A tank system of a motor vehicle, comprising:

• a fuel tank;
• a volume-modifying element arranged in an interior of the fuel tank at least substantially above a liquid level, wherein the volume-modifying element forms a compensating volume connected to surroundings of the fuel tank;
• a valve arrangement that closes in a float-controlled manner when filling the fuel tank so as to bring about a maximum fill level in the fuel tank;
• and
• means for eliminating an influence of the volume-modifying element on the maximum fill level in the fuel tank;
• wherein the fuel tank is configured such that, as viewed in the vertical axis direction, an inner side of an upper tank wall below which the volume-modifying element is arranged lies lower than in a region of the valve arrangement that closes in the float-controlled manner.

A tank system of a motor vehicle, comprising:

• a fuel tank;
• a volume-modifying element arranged in an interior of the fuel tank at least substantially above a liquid level, wherein the volume-modifying element forms a compensating volume connected to surroundings of the fuel tank;
• a valve arrangement that closes in a float-controlled manner when filling the fuel tank so as to bring about a maximum fill level in the fuel tank;
• and
• means for eliminating an influence of the volume-modifying element on the maximum fill level in the fuel tank;
• wherein the means for eliminating the influence of the volume-modifying element comprises:
• an actuable valve provided in a connection between the compensating volume of the volume-modifying element and the surroundings, said actuable valve being actuated in a closing direction when a fuel fill level, which rises during filling, has reached the maximum fill level.

A tank system of a motor vehicle, comprising:

• a fuel tank:
• a volume-modifying element arranged in an interior of the fuel tank at least substantially above a liquid level, wherein the volume-modifying element forms a compensating volume connected to surroundings of the fuel tank;
• a valve arrangement that closes in a float-controlled manner when filling the fuel tank so as to bring about a maximum fill level in the fuel tank;
• and
• means for eliminating an influence of the volume-modifying element on the maximum fill level in the fuel tank;
• wherein the means for eliminating the influence of the volume-modifying element comprises:
• a valve provided in a connection between the compensating volume of the volume-modifying element and the surroundings, said valve being at least partially closed by a float which is displaced as a result of a fuel fill level rising during filling.

A tank system of a motor vehicle, comprising:

• a fuel tank;
• a volume-modifying element arranged in an interior of the fuel tank at least substantially above a liquid level, wherein the volume-modifying element forms a compensating volume connected to surroundings of the fuel tank;
• a valve arrangement that closes in a float-controlled manner when filling the fuel tank so as to bring about a maximum fill level in the fuel tank;
• means for eliminating an influence of the volume-modifying element on the maximum fill level in the fuel tank;
• a tank ventilation line leading from the valve arrangement that closes in the float-controlled manner into the surroundings;
• and
• a compensating ventilation line that connects the compensating volume of the volume-modifying element to the surroundings, wherein
• the tank ventilation line and the compensating ventilation line are dimensioned such that, in a case of an identical air volume flow of less than or equal to 60 liters per minute, a drop in pressure in the compensating ventilation line is at most half as large as that in the tank ventilation line.