SPLIT POWER INFINITELY VARIABLE TRANSMISSION ARCHITECTURE INCORPORATING A PLANETARY TYPE BALL VARIATOR WITH MULTIPLE FIXED RANGES

摘要

A transmission includes an input shaft, an output shaft, at least five planetary gearsets, a variable-ratio unit, and at least five clutches. The at least five clutches are selectively engageable in combination with one another to select one of a plurality of operating modes including at least one reverse mode, at least five forward modes, and at least five transition modes. One of the at least five transition modes is configured to transition the transmission from the at least one reverse mode to one of the at least five forward modes. Another one of the at least five transition modes is configured to transition the transmission from the one of the at least five forward modes to another of the at least five forward modes. Each of the at least five transition modes includes a fixed speed ratio defined between the input shaft and the output shaft.

主权项

1. A transmission comprising:
an input shaft configured to receive torque from a drive unit, an output shaft configured to transmit torque to a load, at least five planetary gearsets arranged between the input shaft and the output shaft, a variable-ratio unit arranged between the input shaft and the output shaft, and at least five clutches arranged between the input shaft and the output shaft, the at least five clutches being selectively engageable in combination with one another to select one of a plurality of operating modes including at least one reverse mode in which torque output by the output shaft has one direction, at least five forward modes in which torque output by the output shaft has another direction opposite the one direction, and at least five transition modes, wherein (i) one of the at least five transition modes is configured to transition the transmission from the at least one reverse mode to one of the at least five forward modes, (ii) another one of the at least five transition modes is configured to transition the transmission from the one of the at least five forward modes to another of the at least five forward modes, and (iii) each of the at least five transition modes includes a fixed speed ratio defined between the input shaft and the output shaft.