Fuel injectors
AssigneeVitesco Technologies GmbH
InventorsFrank Denk, Ulrich Wagner
Life of this patent
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Abstract
Various embodiments may include a method for adapting the opening behavior of a fuel injector having a solenoid drive, the method comprising: applying a voltage pulse having a predetermined electrical voltage to the solenoid drive; acquiring a time profile of the strength of a current flowing through the solenoid drive; comparing the acquired time profile with a reference profile; and adjusting a value of a mechanical parameter of the fuel injector to reduce a deviation between the acquired time profile of the strength of the current and the reference profile.
Claims8
A method for adapting the opening behavior of a fuel injector having a solenoid drive, the method comprising:
- applying a voltage pulse having a predetermined electrical voltage to the solenoid drive;
- acquiring a time profile of the strength of a current flowing through the solenoid drive;
- comparing the acquired time profile with a reference profile;
- and
- adjusting a value of a mechanical parameter of the fuel injector to reduce a deviation between the acquired time profile of the strength of the current and the reference profile;
- wherein comparing the acquired time profile with the reference profile comprises determining a difference between a first time at which a predetermined event occurs in the acquired time profile of the strength of the current, and a second time at which the predetermined event occurs in the reference profile.
A device for adapting the opening behavior of a fuel injector having a solenoid drive, the device comprising:
- an application unit for applying a voltage pulse having a predetermined electrical voltage to the solenoid drive;
- an acquisition unit for acquiring a time profile of the strength of the current flowing through the solenoid drive;
- a comparator unit for comparing the acquired time profile with a reference profile;
- and
- an adjustment unit for adjusting a value of a mechanical parameter of the fuel injector to reduce a deviation between the acquired time profile of the strength of the current and the reference profile;
- wherein comparing the acquired time profile with the reference profile comprises determining a difference between a first time at which a predetermined event occurs in the acquired time profile of the strength of the current, and a second time at which the predetermined event occurs in the reference profile.
Dependencies are inferred from the claim text.