Multi-step reduction gear for vehicle e.g. motor car, has five switch units that are coupled between planetary gear stages, and coupling elements that are provided for coupling fifth switch unit to third planetary gear stage

摘要

The gear has three planetary gear stages (P1a-P3a) connected for circuitry of five incineration-motor forward gears, three electromotive forward gears and four electrically variable transmission (EVT) operating ranges. A transmission input shaft (10a) and a transmission output shaft (11a) enable torque-proof attachments of internal combustion engine and final drive. Five switch units (S1a-S5a) are coupled between planetary gear stages. The coupling elements (S11a,S12a,S21a,S22a,S31a,S32a,S41a,S42a,S51a,S52a) are arranged for coupling switch unit (S5a) to planetary gear stage (P3a).