Method for determining the position of an armature of an electromagnet and fluid system

A method for determining a position of an armature of an electromagnet of an electromagnetically actuated fluid valve, the electromagnet including a coil and the armature, the method being executed by an electronic control unit and comprising the steps of:

• applying a current profile in the coil of the electromagnet, the current profile being below a minimum actuation current of the electromagnet, comprising:
• setting a current in the coil of the electromagnet to a first defined current value during a first time interval,
• regulating the current in the coil of the electromagnet to the first defined current value during a second time interval, and
• turning off the current in the coil of the electromagnet during a third time interval;
• determining a characteristic profile of the electromagnet by:
• determining a compensation characteristic of the electromagnet during the second time interval, and
• determining a position characteristic of the electromagnet during the third time interval;
• and
• calculating the position of the armature of the electromagnet depending on the characteristic profile.