Method for recognizing an error in a sensor signal during operation of a fuel injector

A method for recognizing an error in a sensor signal during operation of a fuel injector of an internal combustion engine, in which a switch valve of the fuel injector is activated using an activation signal, and in which the sensor signal is detected as a signal of a sensor, which is provided for detecting characteristic operating points of the fuel injector, the method comprising:

• in a predefined time window of the sensor signal, which includes a point in time of a characteristic operating point of the fuel injector, determining at least one property of the sensor signal, which includes a signal level and/or a rise time;
• and
• determining, based on the at least one property of the sensor signal, whether an error is present.

A processing unit configured to recognize an error in a sensor signal during operation of a fuel injector of an internal combustion engine, in which a switch valve of the fuel injector is activated using an activation signal, and in which the sensor signal is detected as a signal of a sensor, which is provided for detecting characteristic operating points of the fuel injector, the processing unit configured to:

• in a predefined time window of the sensor signal, which includes a point in time of a characteristic operating point of the fuel injector, determine at least one property of the sensor signal, which includes a signal level and/or a rise time;
• and
• determine, based on the at least one property of the sensor signal, whether an error is present.

A non-transitory machine-readable memory medium on which is stored a computer program for recognizing an error in a sensor signal during operation of a fuel injector of an internal combustion engine, in which a switch valve of the fuel injector is activated using an activation signal, and in which the sensor signal is detected as a signal of a sensor, which is provided for detecting characteristic operating points of the fuel injector, the computer program, when executed by a processing unit, causing the processing unit to perform the following steps:

• in a predefined time window of the sensor signal, which includes a point in time of a characteristic operating point of the fuel injector, determining at least one property of the sensor signal, which includes a signal level and/or a rise time;
• and
• determining, based on the at least one property of the sensor signal, whether an error is present.