Proceedings of the Korean Society for Agricultural Machinery Conference (한국농업기계학회:학술대회논문집)
- 2000.11b
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- Pages.498-505
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- 2000
SIMULATION OF A HYDRAULIC CONTROL SYSTEM FOR POWERSHIFT TRANSMISSION OF TRACTORS
- Kim, D. C. (School of Biological Resources and Material Engineering College of Agriculture and Life Sciences, Seoul National University) ;
- Lee, H. S. (School of Biological Resources and Material Engineering College of Agriculture and Life Sciences, Seoul National Universit) ;
- Kim, K. U. (School o JBiological Resources and Material Engineering College of Agriculture and Life Sciences, Seoul National Universit) ;
- Y S. Nam (R＆D Institute, Tongyang Moolsan Co., LTD.)
- Published : 2000.11.01
Abstract
Performance of a hydraulic system is influenced by its working temperature. Therefore, it is very important to make the system perform uniformly in an entire range of the working temperature. In this study a simulation of a hydraulic control system for the powershift transmission of tractors was conducted and the effect of the temperature was investigated in terms of design conditions of the system. Results of the simulation are as follows. The hydraulic control system with a spring accumulator was found to be more convenient to control the shifting time than that with a gas accumulator. By returning the oil from the clutches to the system through a path between the filter and pump, the time delay due to the pressure difference between the low and high temperatures could be reduced. Therefore, it was recommended that the hydraulic control system for the powershift transmission of tractors must be equipped with a spring accumulator and a circuit to return oil from the clutches to the system through a path between the filter and pump.