Controlling gear change by controlling clutch fill pressure and shift pressure independently and according to engine speed

摘要

A transmission controller (40) is operative to measure engine speed from an engine speed sensor (46) or on the basis of a throttle position sensor (14) and to control the fill time and shift time of a gear change by adjusting the fill pressure and shift pressure applied to the on-coming clutch (C1-C5) substantially independently of one another. In use, the controller (40) stores a plurality of best fill pressures and best shift pressures for the various types of gear changes and for various engine speed ranges. More efficient gear change can be provided together with a reduction in clutch wear.