Heavy 12-gear AMT transmission assembly

Abstract

The invention discloses a heavy 12-gear AMT transmission assembly which comprises a transmission case, a main box, an auxiliary box and an automatic gear shifting control device; the automatic gear shifting control device comprises a TCU, a gear selecting and shifting actuator, a main box intermediate axle brake control valve, a main box intermediate axle brake, an auxiliary box control valve and an auxiliary box air cylinder, where in the gear selecting and shifting actuator, the main box intermediate axle brake control valve and the auxiliary box control valve are all connected with the TCU, and the main box intermediate axle brake comprises a friction plate and a piston; when the main box shifts gears, the main box intermediate axle brake control valve receives a control signal from the TCU, controls the piston to act through an air channel, the piston presses the friction plate tightly, braking on a main box intermediate axle is achieved, and then the gear selecting and shifting actuator completes a gear shifting action of the main box. Accordingly, a main-auxiliary box double-intermediate axle structure is adopted, the bearing capacity is high, the input torque reaches 2,300 Nm, the life reaches 1500,000 kilometers, the speed ratios of all the gears are reasonable, the speed ratio of the first gear is high, and the reliability is high.

Description

technical field [0001] The invention relates to the field of heavy-duty vehicle transmissions, in particular to a heavy-duty 12-speed AMT transmission assembly. Background technique [0002] At present, due to its compact structure, large transmission torque and long service life, the transmission with double countershaft structure is widely used in medium and heavy trucks. [0003] Most of the domestic double countershaft transmissions adopt manual mechanical shifting, which requires the driver to have very high driving skills and rich driving experience, the impact of shifting is relatively large, and the comfort of the vehicle is poor. In addition, the driving of a manual transmission car is greatly affected by the driver's subjective influence, and the fuel consumption is high after driving for a long time, and the economy of the whole vehicle is poor. [0004] The AMT transmission greatly reduces the driver's operating intensity, improves the driver's shifting comfort ...

AI Technical Summary

Problems solved by technology

[0003] Most of the domestic dual countershaft structure transmissions adopt manual mechanical shifting, which requires the driver to have very high driving skills and rich driving experience, the shifting impact is relatively large, and the vehicle comfort is poor

In addition, the driving of a manual transmission car is greatly influenced by the driver's subjectivity, and the fuel consumption is high after driving for a long time, and the economy of the whole vehicle is poor.

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