Abstract This paper mainly studies the tribological performance of friction pairs and poor lubrication during piston movement. Based on average Reynolds equation comprehensively considering variable viscosity density characteristics lubricating oil, a transient hydrodynamic model ring-cylinder liner pair is established. By solving established model, oil film thickness value, value other paramet...

The hydraulic steering mechanism can lead the vehicle’s hydraulic system more complex and the tire wear heavier in the process of steering, which is detrimental to the steering control of the articulated motordriven vehicle. Thus the skid steering mode is implemented in the articulated motor-driven vehicle in this paper. This mode can simplify the vehicle without steering cylinder and it is mor...

This paper aims to research the position control of the hydraulic cylinder controlled by the high-speed on-off valve to realize the precise position control. The strategy combining the pulse width modulation with pulse frequency modulation is proposed to compensate the dead and saturated zones of the high-speed on-off valve, which is on the groundwork of the analysis of the flow characteristic ...

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