Patent ID: 9316478
Filing Date: 2016-04-19
CPC Classification: F02D,F02M,F16K,G01B

Claim Text:
1. A method for detecting when a closing point of a hydraulic valve has been reached, wherein the valve has a closing body which can be activated by an electric actuator in order to close the valve, the method comprising: applying a voltage to the actuator, the voltage being predefined for closing the valve, detecting a profile of a current flowing through the actuator during a closing process of the valve, the profile of the detected current including a first rise corresponding to the valve being at least partially opened, a subsequent fall of the detected current corresponding to a closing movement of the closing body, and a second rise of the detected current subsequent to the fall of the detected current, determining a local minimum of the detected current between the fall and the second rise in the profile of the detected current, and determining a closing point corresponding to a time of the local minimum of the detected current, based on the determined local minimum of the detected current.