Patent ID: 8087400

Claim:
A method for metering a fluid by means of an injection valve which comprises a magnetic actuator and an injector needle able to be moved axially by means of the magnetic actuator, the method comprising the steps of: activating the magnetic actuator for an individual injection process with at least one actuation signal with a first signal waveform or with an actuation signal with a second signal waveform, wherein the two actuation signals at least differ from one another in that, on activation of the magnetic actuator by means of the actuation signal with the first signal waveform, less energy is transmitted to a magnet unit of the magnetic actuator than on activation of the magnetic actuator by means of the actuation signal with the second signal waveform, activating the magnetic actuator by means of the actuation signal with the second signal waveform if an activation of the magnetic actuator by means of the actuation signal with the first signal waveform leads to an undesired premature closure of the injector needle.