Method for controlling a regeneration valve of a fuel vapor retention system
AssigneeSiemens Aktiengesellschaft
InventorsWolfgang Ludwig, Matthias Wiese
Life of this patent
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Abstract
The invention relates to an operating method for a regeneration valve of a fuel vapor retention system, particularly of a tank vent valve for regenerating an activated carbon filter during which the regeneration valve is controlled by a control signal, whereby the control signal corresponds to a designated valve position of the regeneration valve. The invention provides that the correlation between the control signal and the resulting valve position of the regeneration valve is determined during a calibration process.
Claims9
A method for controlling a regeneration valve of a fuel vapor retention system for an internal combustion engine, comprising:
- sequentially controlling the regeneration valve with different values of a control signal;
- regulating a speed and/or an air ratio of the internal combustion engine to predetermined desired values for each value of the control signal and determining the engine intervention required;
- deriving a valve position of the regeneration valve from the engine intervention for each value of the control signal;
- and
- storing the individual values of the control signal and the resulting valve position as support points of a valve characteristic.
Dependencies are inferred from the claim text.