Automatic overdrive transmission

Abstract

The invention discloses an automatic overdrive transmission, which comprises an input shaft, an output shaft, an intermediate shaft, a reverse gear shaft, a synchronizer I, a synchronizer II, a one-way overrun clutch F1 and a one-way overrun clutch F2, wherein a driving gear for various gears is arranged on the input shaft; a driven gear meshed with the driving gear for various gears is arranged on the intermediate shaft; the synchronizer I is arranged between a first-gear driven gear and a second-gear driven gear; the synchronizer II is arranged between a third-gear driving gear and a fourth-gear driving gear; the one-way overrun clutch F1 is sleeved on the input shaft; an outer ring of the one-way overrun clutch F1 is fixed on the fourth-gear driving gear; an inner ring of the one-way overrun clutch F1 is fixedly connected with the synchronizer II; the one-way overrun clutch F2 is sleeved on the intermediate shaft; an outer ring of the one-way overrun clutch F2 is fixed on the second-gear driven gear; and an inner ring of the one-way overrun clutch F2 is fixedly connected with the synchronizer I. By the transmission, only one synchronizer is controlled, out-of-gear and gear selection are avoided, time of shifting the neutral gear and selecting gears is reduced, and the gear shift process is stable. Meanwhile, compared with the prior art, the automatic overdrive transmission has a simpler control process.

Description

technical field [0001] The invention relates to an automatic transmission, in particular to an overrunning automatic transmission. Background technique [0002] Automatic mechanical transmission (AMT) is a new type of transmission that electronically controls traditional dry clutch and manual gear transmissions to achieve automatic gear shifting. The application of AMT not only improves the shortcomings of low transmission efficiency, complex structure and high cost of AT automatic transmission, but also the application of modern electronic technology retains the advantages of AT and gear transmission, which greatly improves the efficiency and power performance of gear shifting. [0003] The AMT automatic transmission of the prior art still follows the characteristics of the traditional synchronizer meshing transmission. In the current AMT, when adjacent gears do not share a synchronizer, the shifting of gears at this time requires disengaging one synchronizer and engaging ...

AI Technical Summary

Problems solved by technology

In the current AMT, when adjacent gears do not share a synchronizer, the shifting of gears at this time requires disengaging one synchronizer and engaging the other synchronizer to transmit power, so that two synchronizers need to be controlled The movement of the AMT automatic transmission in the prior art has to go through the clutch separation time, the neutral gear time, the gear selection time, the gear shift time and the clutch engagement time when shifting gears, so the shifting time is long and the control process is cumbersome

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