An Electrohydraulic Remote Proportionally Controlled Pump and a Productive Application on an Asphalt Paver

Remote controllability of hydraulic components broadens their range of application. Remote controls on variable volume pumps range from simple manual linkages and cables to more sophisticated controls, such as load-sensing or electrohydraulic proportional control.

This paper will discuss the Dynex/Rivett variable volume pump with an integral electrohydraulic remotely controlled stroking device, used in combination with a choice of pressure controls. It will also discuss the closed-loop application of this pump on an asphalt paver. By using electronically closed-loop control logic, the paver is able to provide a mat of more consistent quality and density. The electrohydraulic control package on this pump acts as the interface between the high intelligence capability of the electronics and the high horsepower capability of the hydraulics.