Abstract
Smooth shift and low shift shock are needed to improve power shift quality and comfort of construction vehicle. And higher dynamic performance of power shift clutch is needed. In this paper, the dynamic mathematical model and simulation model of the clutch engagement process were established, the factors affecting the shift quality were analyzed qualitatively and quantitatively. The simulation model of the transmission system was established based on the software AMESim, the corresponding vehicle tests were performed, and the shifting quality was improved by changing key parameters. Analysis results illustrate that the proposed mathematical model and simulation model are correct and effective and can be used to predict and evaluate construction vehicle shift-feel, which are the theoretical basis for analysis and research on the static and dynamic characteristics of the dynamic shifting process in the future.
Highlights
Shift quality is an important index to reflect the performance of the whole machine[1]
By reasonable controlling the pressure characteristics of the oil that comes into the clutch cylinder through a variable speed control valve, it can effectively reduce shift shock in the process of shifting, reduce the friction of clutch disc, ensure dynamic performance in the process of shifting and get good shift quality
The Simulink MATLAB method, which is often used to do the dynamic simulation for the research of construction vehicle transmission system, is too dependent on the theoretical analysis in the modeling process
Summary
Shift quality is an important index to reflect the performance of the whole machine[1]. By reasonable controlling the pressure characteristics of the oil that comes into the clutch cylinder through a variable speed control valve, it can effectively reduce shift shock in the process of shifting, reduce the friction of clutch disc, ensure dynamic performance in the process of shifting and get good shift quality. It has important significance for improving shift quality by researching on the oil pressure characteristics, the binding time and the friction torque characteristics of clutch engagement[3]
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