Parallel power transmission unit with at least two individual systems, operated with predetermined maximal revolving speed of input shaft

摘要

The transmission unit is divided into at least two individual systems, each comprising an input shaft to be coupled with a drive shaft by a friction clutch and for the creation of several transmission levels. A specific maximal speed of rotation of the input shaft is predetermined for each of the transmission levels. When particular transmission levels are parallel used in both systems a limitation of the revolution speed of the input shaft of the higher ratio of transmission is introduced.