Pressure-maintaining arrangement
AssigneeMannesmann VDO AG
InventorBernd Rumpf
Life of this patent
Estimating the term…
Abstract
In a pressure-maintaining device for a fuel supply system of an internal combustion engine (1) of a motor vehicle, a pressure reservoir (5) is arranged in a supply line (7) leading to the internal combustion engine (1). The pressure reservior (5) has a pressure chamber (13), which is bounded by a movable wall (14) that is pretensioned by a compression spring (15). The position of the movable wall (14) is registered by a displacement transducer (18) and forwarded to a regulating device (12). The regulating device (12) regulates the rotational speed of a fuel pump (3) as a function of the position of the movable wall (14).
Claims30
A pressure-maintaining device for a fuel supply system of an internal combustion engine of a motor vehicle, having a pressure reservoir connected to a supply line between a fuel pump and the internal combustion engine, the pressure reservoir having a pressure chamber, a pretensioned, movable wall in order to bound a volume of fuel in the pressure chamber and means for registering the position of the movable wall, it being possible for the fuel pump to be variably regulated by a regulating device as a function of the position of the movable wall, wherein the regulating device is designed to produce a central position of the movable wall.
A pressure-maintaining device for a fuel supply system of an internal combustion engine of a motor vehicle comprising:
- a fuel pump;
- a supply line connecting the fuel pump to the internal combustion engine;
- a pressure reservoir connected to the supply line, the pressure reservoir comprising:
- a pressure chamber;
- a movable wall within the pressure chamber that bounds a volume of fuel in the pressure chamber;
- wherein the pressure chamber acts as a buffer of fuel by bounding a sufficient volume of fuel to supply fuel to the engine when the fuel pump is undersupplying fuel to the engine and to retain a volume of fuel when the fuel pump is oversupplying fuel to the engine;
- and
- a fuel pump regulator that determines the position of the movable wall and variably regulates the fuel pump as a function of the position of the movable wall.
Dependencies are inferred from the claim text.