Method and device for controlling a valve

摘要

A method for controlling a valve including a spring, an actuator having an actuator force opposing the spring, and a pin actuatable by the actuator. To open the valve, in a first operating mode a current having a predefined curve is applied to the actuator, starting from a starting value of the current at which the pin is positioned to allow the valve to close, measured values of the current are determined chronologically sequentially, a reference value of the current takes on the current measured value of the current when the measured current deviates from the applied current by a predefined degree. In a second operating mode, a current having a predefined curve is applied to the actuator, starting with the starting value of the current to a final value of the current at which the pin is in a position that prevents the valve from closing.

主权项

1. A method for controlling a valve including a spring having a spring force, an actuator having an actuator force that counteracts the spring force, and a pin that is actuatable by the actuator, the method comprising:
in a first operating mode:
applying a current having a predefined, nonconstant profile to the actuator starting from an initial value of the current at which the pin is in a position that permits the valve to close,determining measured values of the current in a chronological sequence,upon a profile of the measured values of the current deviating from the profile of the current applied to the actuator by a predefined extent, a reference value of the current assuming a present measured value of the current, wherein the reference value of the current corresponds to the actuator force being equal to the spring force, and in a second operating mode, applying a current having a predefined nonconstant profile to the actuator starting from the initial value of the current up to a final value of the current, wherein the reference value lies between the initial value and the final value of the current, and at the final value of the current the pin is in a position that does not permit the value to close.