Speed change device, speed change system, control method of speed change system and automobile

Abstract

The invention discloses a speed change device, a speed change system, a control method of the speed change system and an automobile. The speed change device comprises a power unit, a first speed change mechanism, a second speed change mechanism, a power output unit and a speed regulation unit, wherein the first speed change mechanism is connected with the power unit and comprises a first power output part, the first power output part can at least form a first rotating speed under driving of the power unit, the second speed change mechanism is connected with the power unit and comprises a second power output part and an intermediate shaft, the second power output part can at least form a second rotating speed under driving of the power unit, the intermediate shaft is used for transmitting power of the power unit to the second power output part, the power output unit comprises a power output shaft and a connection switching part which is connected with the power output shaft and is selectively connected with the first power output part or the second power output part, the speed regulation unit is connected with the intermediate shaft, and the speed regulation unit is used for adjusting the rotation speed of the intermediate shaft during the process in which the connection switching part is connected with the first power output part or the second power output part.

Description

technical field [0001] The invention relates to a speed change device, a speed change system with the speed change device, a control method of the speed change system and an automobile with the speed change system. Background technique [0002] Automatic transmissions are the core components of automobiles and other mechanical transmissions. At present, there are four main types: AMT, AT, DCT and AMT. Among them, due to its simple structure and high transmission efficiency, AMT transmissions are widely used in low-end passenger vehicles and medium-to-heavy trucks in the traditional automobile industry. As far as the new energy vehicle industry is concerned, since the motors used in new energy vehicles have strong speed regulation capabilities, the requirements for transmissions in new energy vehicles are mainly reflected in simple structure, high transmission efficiency, and low cost. In terms of characteristics, thus, AMT transmissions with the above characteristics are m...

AI Technical Summary

Problems solved by technology

[0005] 1. During the shifting process, since the AMT transmission cannot be separated from the driving motor, and the driving motor has a low control accuracy for the speed, the resulting shifting impact is likely to cause early wear and even failure of the gear hub sliding sleeve

[0006] 2. Since there is a large speed difference between the gear hub sleeve and the gear to be connected when shifting gears, it will bring a relatively large shifting resistance, which in turn will lead to long shifting time and the failure of the shifting actuator. The screw rod that drives the gear hub sliding sleeve to move is prone to failure and other problems;

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