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International Journal of Automotive Technology 2005;6(1): 65-70. |
| REDUCTION OF PRESSURE RIPPLES USING A PARALLEL LINE IN HYDRAULIC PIPELINE |
| K.-H. KIM1, J.-S. JANG2, D.-S. Jung3, H.-E. KIM3 |
1Kyung-Hee University
2Kyung Won College
3Korea Institute of Machinery & Materials |
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| ABSTRACT |
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Pressure ripples, which are inevitably generated by a fluctuation of flow rate caused by a pump mechanism, include noises and vibrations in hydraulic pipeline. These noises and vibration deteriorate the stability and accuracy of hydraulic systems. The accumulator and hydraulic attenuator are normally used to reduce the pressure ripples. In this study, a parallel line is introduced to the hydraulic pipeline for the hydraulic system with a bent-axis piston pump as a method to reduce the pressure ripples. The dynamic characteristics of the hydraulic pipeline with a parallel line are analyzed by a transfer matrix in the frequency domain. The usefulness of the hydraulic pipeline with a parallel line was ascertained by experiment and simulation. The results from the experiment and simulation show that the hydraulic pipeline with a parallel line were effective in reducing the pressure ripples. |
| Key Words:
Pressure ripples, Flow rate, Hydraulic pipeline, Parallel line, Bent-axis piston pump, Transfer matrix |
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