Automatic transmission with double intermediate shafts for collaboratively transmitting power and control method of automatic transmission

Abstract

The invention provides an automatic transmission with double intermediate shafts for collaboratively transmitting power. The automatic transmission comprises a first clutch, a first intermediate shaft, a second clutch, a second intermediate shaft, a transmission input shaft, a transmission output shaft and a planetary mechanism, wherein the planetary mechanism comprises a planetary carrier which is connected with the transmission input shaft, a gear ring which is connected with one end of the first clutch which is not connected with the first intermediate shaft, and a sun gear which is connected with one end of the second clutch which is not connected with the second intermediate shaft. The invention additionally provides a corresponding control method. On the basis of the existing dual-clutch automatic transmission, by additionally arranging the planetary mechanism and two brakes and using two clutches in a matched way, the automatic transmission with double intermediate shafts for collaboratively transmitting power not only can achieve the goal of realizing more speed-ratio gears by using few gear pairs, but also can realize the power shift performance of the dual-clutch automatic transmission.

Description

technical field [0001] The invention relates to an automobile transmission system, in particular to an automobile clutch transmission system, in particular to an automatic transmission and a corresponding control method in which double countershafts cooperate to transmit power in the automobile clutch transmission system. Background technique [0002] The current automatic transmissions of automobiles mainly include hydromechanical automatic transmission (AT), continuously variable transmission (CVT) and electromechanical automatic transmission (AMT). In particular, the development of electronically controlled mechanical automatic transmissions has attracted the attention of major automobile factories because of its advantages of high fuel economy, low emission and protection of existing manual transmission production investment required by the development of the current automobile industry. However, the working principle of AMT determines that it has the disadvantage of pow...

AI Technical Summary

Problems solved by technology

In fact, although the DCT system realizes power shifting, like all existing mechanical automatic transmissions, the number of gears in the transmission is limited by the number of transmission gear pairs in the transmission, that is, in general, there are several pairs There are several gears for the transmission gear; at the same time, only one shaft transmits power when the DCT system is working, and the other shaft is in an idle state

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