Adaptives Gangschaltungssteuersystem basiert auf unscharfer Logik

摘要

A method of establishing an adaptive pressure term (LPad) in an automatic transmission having a pressure command developed from a base line pressure term (LPdes) and an adaptive pressure term (LPad) extends implementation of adaptive pressure corrections during non-ideal periods of operation such as low temperatures, short operating cycles and driver variations by establishing an adaptive pressure term (LPad) proportional to a measure of confidence (CF) in a pressure correction term (PCn) calculated at each ratio change of the transmission. The measure of confidence (CF) is determined according to a variety of functions of predetermined powertrain operating parameters and measures of criticality.