Piston cylinder system, control method, AMT gear shifting system and control method

Abstract

The invention relates to a piston cylinder system, a control method, an AMT gear shifting system and a control method, and relates to the technical field of AMT gearbox control. According to the piston cylinder system and the AMT gear shifting system, a piston structure with asymmetrical stress surfaces on the two sides is adopted, through flexible movement of a third piston and clutch matching of a second piston, when a piston rod moving from the left position to the middle position or from the right position to the middle position, the total stress area of the piston in a cavity on the upstream side of the piston rod is always larger than the stress area of the piston in a cavity on the downstream side of the piston rod, and therefore pressure difference can be better formed, and clamping stagnation is reduced. According to the method, the working condition that gear picking is difficult due to the fact that the pistons are clamped can be recognized according to the displacement amount of the piston rod in the gear picking (the piston rod moves towards the middle position) process, the gear picking force is controlled by controlling the flow of fluid entering the cavities, the gear picking force can be increased in time when the gear picking force is insufficient, and the problem of gear picking failure is solved.

Description

technical field [0001] The invention relates to a piston-cylinder system and a control method, an AMT gear shifting system and a control method, and in particular to the technical field of AMT gearbox control. Background technique [0002] With the development of pure electric technology, more and more electric drive systems use gearboxes to meet power requirements. The operating load of pure electric mining vehicles is heavy, especially the need to use gearboxes to adapt to high-speed and heavy-duty conditions. However, the driving conditions and working environment in the mining area are harsh, and the life of the shifting motor is very short when electric shifting is used. [0003] The pneumatic shift system adopted by the AMT gearbox has the advantages of high reliability, long life, and low cost. At present, the shift control valve generally uses an on-off valve, which is opened when receiving a shift command, and the air pressure is established in the cylinder to push ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a piston-cylinder system and its control method to solve the problem of control failure caused by the piston being stuck; it also provides an AMT shift system and its control method to solve the problem that the piston is difficult to move to the neutral position and is easily stuck And the AMT shift system is prone to the problem of failure to remove the gear

Images