Patent ID: 6434434
Filing Date: 2002-08-13
Classification: F16H,G05B,Y10T

Abstract:
An electrohydraulic control system for a transmission, comprising:at least one solenoid valve; an output driver electrically connected to said at least one solenoid valve; a measuring coil configured for receiving an analog actuator measured value from said at least one solenoid valve and for receiving an induced voltage signal; an integrator configured for forming an actual magnetizing force value of said at least one solenoid valve dependent upon said analog actuator measured value for control of said at least one solenoid valve; a computing device including a memory device; and an electronic control system including: at least one analog/digital converter configured for conversion of at least one of said actual magnetizing force value and said analog actuator measured value into a digital value; and a digital two-step controller configured for control of said at least one solenoid valve by use of a cyclically-commanded comparison of a set point value to an actual value.