Patent ID: 7483779
Filing Date: 2009-01-27
Classification: F15B,F16K,G05D

Abstract:
1. Method for the adjustment of a control current of current-controlled, hysteresis-affected hydraulic valves for the actuation of individual hydraulic functions of industrial trucks, the control current being generated in an electronic control device according to a manually pre-set transmitter signal, comprising: determining by experiments or via calculation an average characteristic line I=f(Q) for each hydraulic function which is controlled by a hydraulic valve, I is the control current and Q is the volume flux of the hydraulic medium flowing through the hydraulic valve, measuring the specific characteristic line I determining from the characteristic line values a first average control current value for a predetermined volume flux value, deriving a second average control current value from the determined characteristic line I=f(Q) at the predetermined volume flux value, determining an individual control current correction value by calculating a difference between the first average control current value and the second average control current value, storing the control current correction value to the individual hydraulic valve as a code, reading out the code upon assembly of the hydraulic valve, storing the code into the control device, correcting the respective control current when the hydraulic function is triggered using the control current correction value according to the characteristic line I=f(Q) laid down in the control device.