Design of Energy Efficient Hydraulic Systems - System Concepts and Control Aspects
Energy efficiency of hydraulically driven machineries has become one of the most important topics in system design, mainly because of increased fuel costs and stronger regulations about combustion engine emissions. Increased overall system efficiency is of great importance, since this is the way to reduce the fuel consumption in mobile machinery.In order to optimize hydraulic systems for mobile machineries there are several important issues to consider, such as component power density, special valve concepts and/or variable displacement machine control. The optimal system concept will be strongly dependent upon the loading cycle of the machine.In hydraulic applications a clear trend to use more electro-hydraulic control can be seen. The use of digital electro-hydraulic control in vehicles enables both the possibility to use control concepts which reduce the fuel consumption of the vehicle and an easy vehicle operation. However, the control strategies must provide total machine control to fully utilize the advantages of hydrostatic systems. A successful hardware and control system design means easy vehicle operation, high productivity and low operation cost, which is just what the customers are willing to pay for. The main result of this work is that some of the important design parameters have been examined and quantified in a way that they can become useful for further system developments. The hydraulic issues are discussed on a very general level, but from the engineering point of view they are reliable.
Mobile Hydraulics Hydrostatic Transmissions Secondary control Transformers Accumulators
Karl-Erik Rydberg
Division of Fluid and Mech. Eng. Systems, Dept. of Management and Engineering / Linkoping University SE-581 83 LINKOPING, SWEDEN
国际会议
北戴河
英文
943-949
2007-06-06（万方平台首次上网日期，不代表论文的发表时间）