• Title/Summary/Keyword: Power Steering Hose

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Heat-Pressure Characterization of Power Steering Hose by Finite Element Analysis (자동차 파워스티어링 호스의 열내압 특성 유한요소해석)

  • Roh, Gi-Tae;Joen, Do-Hyung;Choi, Ju-Hyung;Cho, Jin-Rae
    • Proceedings of the KSME Conference
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    • 2003.04a
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    • pp.409-414
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    • 2003
  • Power steering hose is device that operation oil passes between steering gear box and oil pump by parts that is used to do steering system. Because this hose is receiving heat and pressure of high temperature, leakage can produce swaging from hitch of steel materials of done part. In this paper, we analyze swaging process of Power steering hose by finite element analysis, and achieved thermal and pressure analysis with this shape. We can analogize weakness part of hose through this result, and examine closely oil leakage and rubber failure mechanism and look for important design benevolence of power steering hose development.

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Finite Element Analysis of Swaging Process for Power Steering Hose (자동차용 파워스티어링 호스의 스웨이징 공정 유한요소해석)

  • Roh, Gi-Tae;Jeon, Do-Hyung;Cho, Jin-Rae
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.28 no.6
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    • pp.747-754
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    • 2004
  • The nonlinear finite element analysis for deformation characteristics of a power steering hose during the swaging process is performed in order to investigate the stress and the strain levels of the hose components. Power steering hose consists of components such as rubber hose, nylon, nipple and sleeve. Moreover, the numerical analysis requires the consideration of material, geometry and boundary nonlinearities. To evaluate the rubber hose strength, the measured stresses and strains are compared with tension and compression test data. Contact force is also a principal factor to examine whether rubber hose is break away from sleeve and nipple or not.

Nonlinear Finite Element Analysis for the Swaging of a High-Pressure Hose (고압호스 스웨이징에 대한 비선형 유한요소해석)

  • Kim, B.T.;Kim, H.J.
    • Journal of Power System Engineering
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    • v.7 no.2
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    • pp.44-50
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    • 2003
  • The power steering hose is a kind of high-pressure hose with reinforced braids in rubber material. It is usually manufactured through the swaging process. In this paper, the deformation characteristics of a power steering hose during the swaging process were analyzed using the nonlinear finite element method. The material properties were obtained on experiments, and the contact conditions were used in consideration of real manufacturing process. Investigations were focused on the stress and strain values of the hose and meta] components at the maximum jaw stroke and at the completion of the process. Especially, the results of inner rubber component were interpreted in detail, because of its important role in the hose efficiency.

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A Study on Influence of High Pressure Hose On Automotive Power Steering Interior Noise Using frequency Analysis (유압식 자동차 동력조향장치 실내소음에 고압호스가 미치는 영향의 주파수 분석을 통한 연구)

  • Jeon, S.G.;Shin, J.Y.;Hwang, H.J.
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2002.11b
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    • pp.51-56
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    • 2002
  • High pressure hose having tuning cables, called 'Resonator hose' is frequently used to attenuate pressure ripple generated by the pump for reducing the vehicle interior noise. A number of studies have been conducted on the resonator hose and its analytical models. However, there are few studies which deal with the influence of resonator hose on vehicle interior noise because the most of studies focused on transmission loss of the resonator hose. This paper presents NVH test results of power steering system and frequency analysis results. In the frequency analysis, both the relations between vibration, pressure ripple and vehicle interior noise and also the design parameters of high pressure hose influencing on vehicle interior noise were discussed. The test was done for various high pressure hose specimens in full turn condition.

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A Study on Influence of High Pressure Hose on Automotive Power Steering Interior Noise Using Frequency Analysis (유압식 자동차 동력조향장치 고압호스가 실내소음에로 미치는 영향의 주파수 분석을 통한 연구)

  • 전승경;신재윤;황호준
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.13 no.2
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    • pp.108-115
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    • 2003
  • High pressure hose having tuning cables, called Resonator hose is frequently used to attenuate pressure ripple generated by the pump for reducing the vehicle interior noise. A number of studios have been conducted on the resonator hose and its analytical models. However, there are few studies which deal with the influence of resonator hose on vehicle interior noise because the most of studies were focused on transmission loss of the resonator hose. This paper presents NVH test results of power steering system and frequency analysis results. In the frequency analysis, both the relations between vibration, pressure ripple and vehicle interior noise and also the design parameters of high pressure hose influencing on vehicle Interior noise were discussed. The test was done for various high pressure hose specimens in full turn condition.

Finite Element Analysis of Power Steering Hose Subject to Internal Pressure (내압을 받는 파워스티어링 호스의 유한요소해석)

  • Cho, Jin-Rae;Jeon, Do-Hyung;Roh, Gi-Tae
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.28 no.2
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    • pp.181-188
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    • 2004
  • The objective of this paper is to numerically examine the mechanical behavior of the swaged power steering(PS) hose subject to internal pressure. PS hose experiences a large internal pressure change in operating, so it's material part has to resist a cyclic expansion and compression without causing oil leakage. This cyclic pressure is intimately associated with fatigue failure of PS hose. In this study, we compare two types of PS hose. The numerical investigation is composed of three steps; swaging analysis, low and high pressure analyses. The comparative numerical results provide the basic data for the optimal PS design.

Derivation of Effective Material Properties of Reinforced Braid Layer Using Detailed 3-D Finite Element Model (상세 유한요소 모델을 이용한 섬유 보강사의 등가물성 유도)

  • Song, Jeong-In;Cho, Jin-Rae
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.28 no.11
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    • pp.1752-1759
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    • 2004
  • Reinforced braid layer (RBL) in automobile power steering hose plays an important role in power steering system. When the working oil is applied to the power steering hose, RBL suppresses rubber hose deformation from internal pressure and heat expansion. RBL is woven textile composites having a double-row structure of nylon cords twisted with the specific helix angle. In this paper, effective material properties of RBL are estimated using a detailed 3-D finite element model considering its complicated geometry. Numerical experiments based on a superposition method are carried out to simulate uniaxial tensile loading condition.

On the Analytical Model of Automotive Steering Hoses Containing Tuner and Its Practical Application (튜너 내장 자동차 조향호스의 해석 모델과 실용적 응용)

  • Lee, J.C.;Oh, S.H.
    • Transactions of The Korea Fluid Power Systems Society
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    • v.6 no.1
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    • pp.1-9
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    • 2009
  • This study presents an analytical model of an automotive steering hose containing tuner(flexible spiral metal tube) to reduce the ripple pressure induced by steering vane pump. The double-wall side branch composed in a steering hose containing tuner was analogically considered as a filter in a conduit. Specialized test equipment was manufactured for the estimation of speed of sound in a conduit and measurement of amplitude ratio between the propagated ripple pressures of inlet and outlet of the steering hose. Experimental data of entire frequency ranges can be obtained through the test once in short time. The results of three points' measurement method and cross-correlation method to estimate the speeds of sound in a hose, tuner, and side branch respectively reveal that cross-correlation method can be used practically. The results of simulation and experiment were so close, especially in the range of engine idling speed, that the proposed analytical model in this study was validated. Sensitivity analyses and experiments show that longer tuner is preferable, and that the positive-positive composition of the steering hoses containing tuner is superior to others to attenuate ripple pressure.

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Attenuation Characteristics of Fluid-Borne Pressure Ripple in Automotive Power Steering Hydraulic Hoses (자동차 동력조향용 유압호스의 압력맥동 감쇠특성)

  • 김도태
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.7 no.3
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    • pp.22-28
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    • 1998
  • This paper presents experimental investigations on the attenuation characteristics of pressure ripple in automotive power steering hydraulic hoses. Also, a mathematical model of hydraulic hoses is proposed to support design of the power steering hydraulic circuit and analyze the attenuation characteristics of pressure ripples. The experimental results show that the pulsation attenuation characteristics of hydraulic hoses is remarkably affected by the flexible metal tube inserted coaxially inside a hydraulic hose with a finite length as well as viscoelastic properties of hose wall. It is also shown that the predicted results by the model proposed here agree well with the measured results over a wied range of frequency.

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The Effect of the Nipple Protrusions on the Deformation Characteristics of the High-Pressure Hose in the Manufacturing Process (호스 제작시 니플 돌기부가 변형 특성에 미치는 영향)

  • Kim, Hynug-Je;Kim, Byung-Tak
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • 2002.05a
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    • pp.51-56
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    • 2002
  • In this paper, the stress and deformation characteristics of the high pressure hose that have the hose components such as rubber, braid and steel( sleeve and nipple) during the manufacturing process, and analyzed using the [mite element method The swaging process is modeled with a contact problem in identical conditions of real circumstances, and the properties of hose materials based on the experimental data are used in this analysis. Also, to understand the effect of the nipple protrusions on the deformation characteristics of a power steering hose among the steel materials shape of the existing model, and changed the steel materials shape partially, and compared with the existing model.

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