Device And Method For Controlling A Fuel Injection Valve

摘要

The present disclosure generally relates to internal combustion engines. The teachings thereof may be embodied in methods for the measuring of a feedback signal generated by the movement dynamics of a fuel injector in operation. A method may include: (a) generating an electrical test pulse; (b) feeding the test pulse into an actuation line connecting the output stage to the injector to an electric drive of the injector; (c) measuring an electrical response pulse generated by the actuation line in response to the test pulse; (d) identifying a characteristic feature of the measured response pulse; (e) transferring the feature to a control and evaluation unit; (f) evaluating the feature; and (g) acquiring the characteristic information item about the measuring channel based on the evaluation of the transferred characteristic feature.

主权项

1. An actuation device for actuating an injector for injecting fuel into the combustion chamber of an internal combustion engine, the actuation device comprising:
an output stage generating electric excitation of an electric drive of the injector, the excitation transmitted to the electric drive via an actuation line; a measuring unit sensing a feedback signal generated by the electric drive in response to the electric excitation and conducted to the measuring unit via the actuation line; and a control and evaluation unit coupled to the output stage and the measuring unit; wherein the control and evaluation unit causes the output stage to generate a predetermined electrical test pulse; the measuring unit senses an electrical response pulse generated at least by the actuation line in response to the test pulse; the measuring unit transfers at least one identified characteristic feature of the measured response pulse to the control and evaluation unit; wherein the control and evaluation unit evaluates the transferred characteristic feature of the response pulse and acquires therefrom at least one characteristic information item about a measuring channel which comprises at least the measuring unit and the actuation line; and the control and evaluation unit uses the at least one characteristic information item to adjust future actuation signals to the injector.