Drive Engineering Under High Pressure: Miniature drive prevents pressure reflections in hydraulic systems test rig

摘要

Pressure pulsations in hydraulic systems generate disturbing noise. At the same time, body and fluid borne sound can place the hydraulic system under load. The main causes of it are hydraulic (positive displacement] pumps. As a result, fuel injection pumps in motor vehicles, for example, must be tested for smooth running in the relevant system. In the course of the necessary steep pressure rise to as high as 2000 bar, the pressure pulsations proliferate and may be reflected at line ends. Such reflections disturb precise measurement of the actual pump pulsation. A hydraulic damping resistor powered by a miniature drive prevents such reflections, so enabling accurate test rig measurements.