Control systems for mobile machinery utilizing separate metering
Research Task/Objectives
Increasing energy costs and continuous tightening of environmental regulations force new developments in the field of valve control systems for mobile machines’ implements. Main objectives are energetic improvements as well as functional enhancements. Systems with independent metering open up a wide range of new possibilities to implement energy efficient operating modes. The objective of this research work is to demonstrate the potentials of these new valve systems using off-the-shelf-components and simple control algorithms. This shall facilitate the transfer of the found solutions into the industry in the near future.
Approach/Results
Valve concept and energy savings for levelling at low load
In the first step, new valve structures have been developed through a systematic approach. The displayed valve system, which has been implemented on a demonstrator test rig, is the outcome of an evaluation of the possible solutions regarding economical and functional criteria.
The second work step dealt with system analysis and the development of a suitable control algorithm for the favored valve structure. In the third step the control concept is being implemented on an electronic control device common in serial production, and then evaluated on the test rig.
A convincingly simple control algorithm enables significant energy savings compared to
state-of-the-art systems without compromising its functionality.
| This research is based on the project: “New Solultions for Electrohydraulic Control Systems with Independent Metering Edges” funded by the DFG (German Research Society WE 4828/1). |