Verfahren zum Hochschalten eines halbgesperrten Verbundgetriebeautomaten mit Zwischenstufen.

摘要

An improved control method and control system for controlling the upshifting of an Automatic Mechanical Transmission (AMT) system including a compound splitter type semi-blocked transmission is provided. At the time of upshifting, the input shaft synchronous speed (ISs) for current output shaft speed and intended gear ratio is calculated. The main section of the transmission is shifted to neutral. The auxiliary section ratio is preselected and the main section is caused to be reengaged at an input shaft speed slightly less than ISs in case of simple upshift (involving only the auxiliary section) and slightly greater than ISs in case of compound upshift (involving both sections of the transmission).