A gear selection actuator of an electronically controlled mechanical automatic transmission

Abstract

The invention provides a gear selection actuator of an electronically controlled mechanical automatic gearbox, which belongs to the field of mechanical technology. It solves the problem that the existing AMT gear selection actuators with 5 gears and lower gears cannot meet the requirements of four gear selection positions. The gear selection actuator of the electronically controlled mechanical automatic transmission is arranged at the shift lever of the automatic transmission, and the mechanism includes several shift parts located between two adjacent shift rods. It is two oil cylinders and a piston rod located between the two oil cylinders. The two ends of the piston rod are respectively located in the above two oil cylinders and there is a shift fork on the piston rod that can toggle the shift rod. The above-mentioned several shift parts and The hydraulic lines are connected. The present invention is a plurality of shifting parts arranged between two adjacent shift levers. Each shifting part is independent and centrally controlled through hydraulic pipelines. There is no gear selection process when shifting gears, which greatly reduces the need for electronically controlled mechanical automatic The power interruption time when the gearbox shifts gears makes the shifting fast and stable.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to an electronically controlled mechanical automatic transmission, in particular to a gear selection actuator of the electronically controlled mechanical automatic transmission. Background technique [0002] With the improvement of science and technology, the requirements for vehicle emissions are becoming more and more stringent. Increasing the number of transmission gears is the most direct way to make the engine work in the best economical area, thereby reducing vehicle exhaust emissions and achieving the goal of saving fuel and reducing emissions. Purpose. The current electronically controlled hydraulic AMT mainly has 5 gears. If you want to develop 6 or 7 gear electronically controlled hydraulic AMT, the main technical bottleneck is the development of the gear selection actuator. The 6 or 7 gear AMT gear selection mechanism must be realized Four positions, for the existing AMT...

AI Technical Summary

Problems solved by technology

The current electronically controlled hydraulic AMT mainly has 5 gears. If you want to develop 6 or 7 gear electronically controlled hydraulic AMT, the main technical bottleneck is the development of the gear selection actuator. The 6 or 7 gear AMT gear selection mechanism must be realized Four positions, for the existing AMT gear selection actuators of the 5th gear and below, the four position requirements for gear selection cannot be met, and the patented structure of the existing four-position oil cylinder is complicated, which reduces reliability

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