Method and device for controlling a fuel-supply system
AssigneeRobert Bosch GmbH
InventorsTimo Steinbach, Dorothee Sommer, Stefan Kieferle
Life of this patent
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Abstract
In a method for controlling a fuel-supply system, a first supply unit supplies fuel from a storage container to a second supply unit. At least a partial quantity of the fuel quantity supplied by the first supply unit returns to the storage container as return quantity via a return line. The return quantity is determined as a function of the operating state of the fuel-supply system. The first supply unit is controlled at least as a function of the return quantity.
Claims29
A method for controlling a fuel-supply system of an internal combustion engine, the method comprising:
- actuating a first supply unit to supply fuel from a storage container to a second supply unit, wherein:
- at least a portion of the fuel supplied by the first supply unit returns as return quantity into the storage container via a return line;
- the second supply unit is situated, with respect to a fuel flow direction, downstream of the first supply unit, downstream of the storage container, and upstream of a combustion engine;
- at least one fuel injector is situated downstream of the second supply unit;
- and
- fuel is supplied by the second supply unit to the combustion engine;
- determining the return quantity as a function of the operating state of the fuel-supply system;
- determining a required quantity based on the return quantity;
- controlling the first supply unit to supply at least the determined required quantity.
A fuel-supply system of an internal combustion engine, the fuel-supply system comprising:
- a first supply unit;
- a second supply unit situated, with respect to a fuel flow direction, downstream of the first supply unit, downstream of a storage container, upstream of a combustion engine to which the second supply unit supplies fuel, and upstream of at least one fuel injector;
- means for actuating the first supply unit to supply fuel from the storage container to the second supply unit, wherein at least a portion of the fuel supplied by the first supply unit returns as return quantity into the storage container via a return line;
- means for determining the return quantity as a function of the operating state of the fuel-supply system;
- means for determining a required quantity based on the return quantity;
- and
- means for controlling the first supply unit to supply at least the determined required quantity.
Dependencies are inferred from the claim text.