TRANSMISSION FOR VEHICLE

摘要

A transmission includes: a first input shaft selectively receiving power from an engine; a second input shaft receiving power from the engine; an output shaft disposed in parallel with the first input shaft; first and second countershafts, and first and second shift units; and a one-way clutch disposed in a power transmission line from the engine to the output shaft and through the second shift unit, transmitting power from the engine only to the output shaft. In particular, the first and second countershafts transmit power to the output shaft, the first shift unit carries out a series of desired gear shifts, and the second shift unit performs duplicate gear shifts one of which gear ratio is the same as one of gear ratios of the series of gear shifts made by the first shift unit.

主权项

1. A transmission for a vehicle, comprising:
a first input shaft selectively receiving power from an engine; a second input shaft continuously receiving power from the engine; an output shaft arranged in parallel with the first input shaft; a first countershaft arranged in parallel with the first input shaft and configured to transmit power to the output shaft; a first shift unit configured to perform a series of gear shifts arranged between the first input shaft and the output shaft, and between the first input shaft and the first countershaft; a second countershaft arranged in parallel with the second input shaft and configured to transmit power to the output shaft; a second shift unit arranged on the second input shaft and the second countershaft so as to carry out duplicate gear shifts, the duplicate gear shifts duplicating at least a portion of the gear shifts in the series of the gear shifts of the first shift unit, each duplicate gear shift having a gear ratio substantially identical to a gear ratio of a corresponding gear shift of the first shift unit; and an one-way clutch configured to transmit power from the engine only to the output shaft.