Paver starting control method, controller and control system

Abstract

The invention relates to the field of pavers and discloses a paver starting control method, a controller and a control system. The method includes: the controller controls a current value of a traveling pump displacement valve to reach a preset starting current value to drive a traveling pump; the controller controls the preset starting current value to last for preset voltage buildup time; after the preset voltage buildup time is over, the controller controls the current value of the traveling pump displacement valve to rise so as to drive a paver to start moving. The controller controls the current value of the traveling pump displacement valve to reach the preset starting current value and further controls the paver to start moving after system voltage buildup is finished, so that problems of high starting pressure impact and vibration of the whole paver are avoided, steadiness in starting of the paver is realized, indentation at joints is reduced, and road surface smoothness is improved. In addition, since the controller controls the current value of the traveling pump displacement valve to directly reach the preset starting current value after receiving starting signals, starting speed of the paver is increased, and performances of the whole paver are improved.

Description

Technical field [0001] The invention relates to the field of paving machines, in particular to a starting control method, controller and control system of the paver. Background technique [0002] With the development of my country's infrastructure, pavers are used more and more widely in road construction, and the demand is also increasing. In the paving process of the paver, whether the control of the starting process is reasonable has a great impact on the paving quality. [0003] At present, there are two general starting control methods. One is to control the current of the displacement valve of the walking pump through a ramp in an open loop mode, and the other is to form a closed-loop control system based on the current of the displacement valve of the walking pump and the walking speed sensor. The signal controls the current of the displacement valve of the walking pump to complete the starting control. [0004] However, the hydraulic response of the paver is lagging during ...

AI Technical Summary

Problems solved by technology

[0004] However, the hydraulic response of the paver lags behind in the control process. The speed sensor and the travel pump displacement valve current are connected to form a closed-loop mode. The pump displacement is controlled according to the speed signal of the travel motor. It may appear that the current is enough to open the travel pump displacement valve, but Due to the hysteresis of the hydraulic response, the paver did not move. At this time, if the current continues to increase, the current will be too large, and the pump flow will suddenly increase. This will bring a greater impact to the start, affect the attitude of the whole machine, and cause road construction seams large indentation

In addition, it is difficult to select the slope rate directly through the slope, and it is inconvenient to debug. Simple slope control will also cause a shock at the start. Slow, which in turn affects the driving performance of the whole machine

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