Patent ID: 8144448
Filing Date: 2012-03-27
Classification: F16D,F16K,H01F,Y10T

Abstract:
1. A control unit (GS) for regulating an electrical coil current (I) of a regulating electrovalve (CV) having an armature (AN) used to adjust a volume flow (Q) in a motor vehicle hydraulic device (HP), comprising: a closed-loop controller (PC) connected via a feedback branch (FB) to the regulating electrovalve (CV) for forming a closed-loop control circuit; said closed-loop controller (PC) operating with a clock cycle (m) and having an input receiving a command variable; and wherein said closed-loop controller (PC) is configured to generate an internal dither signal (DS) and to superimpose the dither signal (DS), substantially synchronously with the clock cycle (m), on a setpoint current (SC) received at said input as the command variable, to thereby create and apply to the armature (AN) of the regulating electrovalve (CV) a constant armature oscillation for reducing a static friction and/or a magnetic hysteresis thereof.