Six-gear automatic transmission for motor vehicle has two single planetary gear sets and dual planetary gear set, in which driving force of drive shaft is transferred to sun gear of second single gear set or dual gear set

摘要

The transmission has two single planetary gear sets (SPG1,SPG2) and a dual planetary gear set (DPG). The dual planetary gear set has planetary gear (P3) coupled to planetary gear (P2) of second single planetary gear set by common planetary gear carrier (CPC). Driving force of drive shaft (3) is transferred to sun gear (S2,S3) of second single planetary gear set or dual planetary gear set. The two single planetary gear sets, dual planetary gear set and drive shaft are arranged in a transmission case (1). The first single planetary gear set includes a sun gear (S1), two planetary gear carriers (PC1), a planetary gear (P1) and an internal gear (R1). The second single planetary gear set includes a sun gear (S2), a planetary gear (P2), and an internal gear (R2). The dual planetary gear set includes a sun gear (S3), a pair of planetary gears (P3) and an internal gear (R3). The internal gear of the dual planetary gear set is firmly connected to the internal gear of the first single planetary gear set. The internal gear of the second single planetary gear set is firmly connected to the planetary gear carrier of the first single planetary gear set.