Research of Power-shift Control of High-powered Tractor Under Load Condition
Aiming at constant torque output,the constant-torque control strategy of power-shift is proposed. Based on constant-torque control strategy,considering diesel engine speed characteristics and the practical needs of tractor under load condition,the practical control strategy of power-shift is propose...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Journal of Mechanical Transmission
2018-01-01
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| Series: | Jixie chuandong |
| Subjects: | |
| Online Access: | http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2018.02.031 |
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| Summary: | Aiming at constant torque output,the constant-torque control strategy of power-shift is proposed. Based on constant-torque control strategy,considering diesel engine speed characteristics and the practical needs of tractor under load condition,the practical control strategy of power-shift is proposed for high-powered tractor. The power-shift process is divided into two periods,which are speed synchronization period and power transfer period respectively. Power transfer period comes first and speed synchronization period comes later when power-shift-up,while speed synchronization period comes first and power transfer period comes later when power-shift-down. Based on the two periods of power-shift,the relationship between actuating pressure of oncoming and off-going clutches and the principles for upper-limit of actuating pressure during power-shift are presented. Based on MATLAB/Simulink,power-shift process is modeled and simulated. The results show that the practical power-shift control strategy can realize no power break and large consistent torque output during shift without coordinating engine,so that the high-powered tractor can adapt to the changes of working resistance and operate continuously without stopping,which improves operation efficiency. |
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| ISSN: | 1004-2539 |