Abstract: In this paper, an efficiency map is created for a double-acting, single-rod hydraulic-actuator using a critically centered four-way spool valve and a load-sensing pump. The purpose of this research is to provide an ...

Abstract: Traditionally, the theoretical torque on the input shaft of a hydrostatic pump has been determined using a macroscopic “power-in, power-out” approach that neglects the time-varying aspects of ...

Abstract: Tipping the cylinder block within an axial-piston swash-plate type hydrostatic machine is a phenomenon that results in a momentary and sometimes permanent failure of the machine since the fluid ...

Abstract: This research examines the idealized and actual flow-ripple of an axial-piston swash-plate type hydrostatic pump. For the idealized case, a “perfect” pump is examined in which the leakage is ...

Abstract: In this research, the control and containment forces and moments acting on the swash plate of an axial-piston pump are examined. From a practical standpoint, swash plate control and containment ...

Abstract: In this research, the friction within the cylinder bore of a swash-plate type axial-piston machine is examined. Unlike previous research, this work develops a mathematical model for the friction ...

Abstract: The objectives of this research are to develop the equations that describe the relative motion between the ball guide and the slipper retainer within an axial-piston swash-plate type hydrostatic ...

Abstract: In this study, the fluid bulk-modulus within a hydrostatic transmission is examined. Specifically, a method for measuring the effective fluid bulk-modulus is proposed based upon the definition ...

Abstract: This research is aimed at generating an efficiency map for a linear hydraulicactuator that is controlled using an opencentered 4way valve. Using the basic configuration of a double rod, doubleacting linear actuator, equations ...

Abstract: Efficiency maps have long been used by engineers to understand the topographical behavior of their machinery. Most commonly, efficiency maps have been generated for internal combustion engines, where the torque–speed ...