Patent ID: 6672990
Filing Date: 2004-01-06
Classification: F16H,Y10T

Abstract:
A method for control of a transmission of a motor vehicle with hydraulically actuatable shifting elements wherein a shifting operation of a shifting element includes a rapid filling phase including a rapid filling time and a charge pressure phase wherein a charge pressure is provided to the element, comprising the steps of:during a period outside of the shifting operation of the shifting element, detecting a divergence of a transmission output train speed signal from a precalculated nominal transmission output speed curve, and when the detected divergence is within one of a rapid filling phase tolerance band and a charge pressure tolerance band, generating an interference signal according to the divergence, the interference signal being one of a rapid filling time test pulse and a charge pressure test pulse, and superimposing the interference signal on a corresponding one of the rapid filling time of the rapid filling phase and the charge pressure of the charge pressure phase to adjust the one of the rapid filling phase and the charge pressure phase to reduce the divergence.