Abstract
Aiming at a self-designed seven-speed planetary gear automatic transmission, the electro-hydraulic-controlled system of power shift is designed by logic method. First of all, according to the transmission diagrams and the working condition of each gear shift element, design the connection condition of the shift valves of each forward gears and the reverse gear in turn, and write out the corresponding logical equations. Then, on this basis, carry out the interlock and failure analysis, and complete the diagram of the power shift electro-hydraulic-controlled system. Finally, according to the designed electro-hydraulic-controlled system and shift valve control status table, logical equations are verified. The results show that the function of the system is realized by using the logic combination of six two-position three-way electro-hydraulic-controlled shift valves and one manual control valve, and the design of the power shift electro-hydraulic-controlled system can be carried out clearly, efficiently and accurately.
Published Version
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