Patent ID: 6101438
Filing Date: 2000-08-08
Classification: F16H,Y10T

Abstract:
A process for automatically coordinating the filling and feeding operation of hydraulically operated and hydraulically or electronically individually commanded shift elements, the filling and feeding operation of which takes place according to a time-dependent pressure curve with a rapid filling phase (SFP), a filling equalization phase (FAP) and a pressure increase phase (DAP) and as parameters are used at least a rapid filling time (T.sub.-- SF), a rapid filling pressure (p.sub.-- SF), a filling equalization period (T.sub.-- FA) and a filling equalization pressure (p.sub.-- FA), characterized in that to optimize the parameters (T.sub.-- SF, p.sub.-- SF, T.sub.-- FA, p.sub.-- FA), two parameters are preset and for the other two parameters within a time-dependent pressure curve, an optimal value (p.sub.-- FA,opt, T.sub.-- FA,opt, p.sub.-- SF,opt, T.sub.-- SF,opt) of the first parameter to be optimized is determined in a manner such that based on an appropriate presettable initial value (p.sub.-- FA,a, T.sub.-- FA,a, p.sub.-- SF,a, T.sub.-- SF,a), said value is changed gradually until a speed change occurs with the start of the pressure increase phase (DAP) and the other parameter to be optimized is determined by gradually changing it at the optimal value (p.sub.-- FA,opt, T.sub.-- FA,opt, p.sub.-- SF,opt, T.sub.-- SF,opt) of the first parameter to be optimized and based on the appropriate presettable initial value (p.sub.-- FA,a, T.sub.-- FA,a, p.sub.-- SF,a, T.sub.-- SF,a) until a speed change occurs at least approximately simultaneously with the start of the pressure increase phase DAP.