Semi-automatic transmission auxiliary mechanism

Abstract

The invention discloses a semi-automatic transmission auxiliary mechanism. The semi-automatic transmission auxiliary mechanism is mounted between a clutch (2) and a transmission (6) and comprises an economic gear driving gear (3), a driving shaft (4), a power gear driving gear (5), a power gear driven gear (9), a power gear one-way clutch (10), a mode switching gear sleeve (11), an economic gear driven gear (12) and an economic gear one-way clutch (13). According to the semi-automatic transmission auxiliary mechanism, the clutch does not need to be disconnected in the gear shifting process of the transmission, clutch abrasion is reduced, and the power interruption time is greatly shortened; in addition, the requirements of laws and regulations are met, and reverse towing braking of an engine can be achieved under the downhill working condition; and a power gear and an economic gear are achieved, the number of meshing pairs of gears is not increased, the transmission efficiency is guaranteed, and the semi-automatic transmission auxiliary mechanism can be matched with various manual transmissions and AMT mechanical automatic transmissions, can be widely applied to various commercial vehicles such as micro trucks, medium trucks, heavy trucks and passenger cars and has huge commercial value.

Description

technical field [0001] The invention relates to an auxiliary mechanism of a semi-automatic transmission, in particular to a transmission that does not need to disconnect the clutch during gear shifting, which reduces clutch wear, greatly reduces power interruption time, meets the requirements of regulations, and can realize The engine back-drag brake realizes the power gear and the economic gear, and does not increase the number of meshing pairs of gears, which ensures the functional mechanism of the transmission efficiency. Background technique [0002] Due to the narrow speed range of the internal combustion engine and the small range of high power and high efficiency, internal combustion engine vehicles need to use a transmission to meet the use of all working conditions. The power and efficiency of the motor drop seriously at high speeds, and the use of a transmission can enable the electric vehicle to maintain a larger power reserve and better energy utilization efficie...

AI Technical Summary

Problems solved by technology

[0004] The current commercialized automatic transmissions mainly include AT (hydraulic automatic transmission), CVT (continuously variable transmission), DCT (dual clutch transmission), and AMT (mechanical automatic transmission). Among them, AT has a hydraulic torque converter to provide buffer , the impact on the transmission system is small, and the comfort is the best, but the manufacturing and assembly requirements are high, and the energy loss caused by the hydraulic transmission is large; the CVT transmission ratio can be changed continuously, and it can ensure that the engine works in the fuel economy zone or large according to different needs. Power range, but the transmission efficiency is low, the reliability is low, and the manufacturing is difficult; the DCT is less difficult to manufacture than the AT and CVT, the shift time is shorter, and the transmission efficiency is high. Currently, more and more vehicles are equipped with DCT transmissions, but The cost of DCT is still much higher than that of AMT

AMT is based on the traditional mechanical transmission with an additional operating mechanism, which has low manufacturing and maintenance costs and high transmission efficiency. However, due to the long shift time, there is power interruption, which affects comfort.

[0005] From the perspective of various transmission schemes, AMT mechanical automatic transmission has the advantages of high reliability, simple manufacture, and low cost, but the shifting time is long and the smoothness of shifting is poor. Among them, the clutch is what restricts the popularization and application of AMT mechanical automatic transmission. Difficult to control, long time for clutch disengagement and engagement

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