• Title/Summary/Keyword: AMESim modeling

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Simulation Injection Mass with Variable Injection Condition in GDI Engine using AMESim (AMESim을 이용한, GDI 엔진에서 연료의 분사조건 변화에 따른 분사량 변화 예측)

  • Shin, Suk Shin;Song, Jingeun;Park, Jongho
    • Journal of ILASS-Korea
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    • v.18 no.1
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    • pp.61-65
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    • 2013
  • In case of GDI engine, shape of injected fuel and injection mass are one of the most important factors for good fuel efficiency and power. But it should be too inefficient and difficult to acquire injection mass data by experiment because condition in engine vary with temperature, pressure, and so on. So, this paper suggests the AMESim (Advanced Modeling Environment for Simulation of Engineering Systems) as simulation program to calculate injection mass. For both simulation and experiment, n-heptane is used as fuel. In AMESim, I modeled the GDI injector and simulated several cases. In experiment, I acquired the injection mass using Bosch method to apply ambient pressure. The AMESim show reasonable result in comparison with experimental data especially at injection pressure 15 MPa. Other conditions are also in good accord with experimental data but error is a little bit large because the injection mass is so low.

Modeling and Dynamic Characteristics Analysis of a Continuously Variable Damper with Reverse type Semi-active Suspension. (반능동현가장치용 리버스 무단연속가변댐퍼의 모델링 및 동특성 해석)

  • 박재필;최창림;윤영환;최병근;정용길
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2004.05a
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    • pp.937-941
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    • 2004
  • Since semi-active suspension systems of automobile, of which suspension damper are controlled actively, exhibit high performance with light system weight, low cost and low energy consumption. From this view point, semi-active suspension systems are greatly expected to be in the mainstream of future controlled suspension systems. In this Paper, mathematical modeling and dynamic characteristics analysis of a reverse continuously variable damper and valve used for semi-active suspension systems are investigated. The mathematical model of piston with valve are proposed by IMAGINE/AMESim in the paper. To verify the mathematical model developed, the dynamic characteristics are simulated by IMAGINE/AMESim and are compared with experimental results. It was confirmed that the developed models represent well the actual system and can be used for control system design.

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Modeling Technique for a Positive and Negative Variable Displacement Swash Plate Hydraulic Piston Pump in a Multibody Dynamics and Multi-Physics Co-Simulation Environment (다물체 동역학과 다중물리 연동 시뮬레이션 환경에서 정/역 가변용량형 사판식 피스톤 펌프의 모델링 기법)

  • Jang, Jin Hyun;Jeong, Heon Sul
    • Journal of Drive and Control
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    • v.16 no.1
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    • pp.36-44
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    • 2019
  • Variable displacement swash plate piston pump analysis requires electric, hydraulics and dynamics which are similar to the one's incorporated in the complex fluid power and mechanical systems. The main variable capacity for the swash plate piston pumps, hydraulics or simple kinematic (swash plate degree, piston displacement) models are analyzed using AMESim, a multi-physics analysis program. AMESim is a multi-physics hydraulic analysis program that is considered good for the environment but not appropriate for environmental analysis for multibody dynamics. In this study, the analytical model of the swash plate type hydraulic piston pump variable capacity is modeled by combining the hydraulic part and the dynamic part through co-simulation of multibody dynamics program (Virtual.lab Motion) and multi-physics analysis (AMESim). This paper describes the whole modeling analysis method on the mechanical analysis of the multi-body dynamics program and how the hydraulic analysis in multi-physics analysis program works. This paper also presents a methodology for analyzing complex fluid power systems.

A Study on Modeling and Simulation of Hydraulic System for a Wheel Loader using AMESim (AMESim을 이용한 휠로더 유압시스템의 모델링 및 시뮬레이션에 관한 연구)

  • Chung, Y.K.;Park, S.H.;Jeong, C.S.;Jeong, Y.M.;Yang, S.Y.
    • Transactions of The Korea Fluid Power Systems Society
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    • v.7 no.4
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    • pp.1-8
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    • 2010
  • 본 논문은 유압해석 상용툴인 AMESim을 이용하여 로드센싱형 휠로더 유압 시스템을 모델링 하였다. 휠로더 유압장치의 주요 구성요소인 펌프, 메인 컨트롤밸브, 압력 보상기, 리모트 컨트롤밸브 및 작업 장치를 모델링 하였으며 실제 차량의 제원을 적용하여 시뮬레이션을 수행하였다. 시뮬레이션 결과와 실차 데이터를 비교 검토하여 시뮬레이션 결과와 실차 데이터가 유사함을 알 수 있었다.

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Analysis of Dynamic Characteristics and Performances of Vent-Relief Valve (산화제 벤트/릴리프 밸브의 동특성 해석 및 작동성능 분석)

  • Jang, Je-Sun;Koh, Hyeon-Seok;Han, Sang-Yeop;Lee, Kyung-Won
    • Journal of the Korean Society of Propulsion Engineers
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    • v.15 no.6
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    • pp.70-77
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    • 2011
  • A ventilation-relief valve performs as a safety-valve assembly for the liquid-propellant feeding system of space launch vehicle. This valve plays a role of relieving the vaporized propellants from propellant tanks during the filling and storing stages of propellants. Also it regulates to maintain the pressure of ullage volume of on-board propellant tanks within the safety-margin during the flight. The simulation model of ventilation-relief valve is designed with AMESim to predict and evaluate the dynamic characteristics and pneumatic behaviors of valve. To validate a valve simulation model, the simulation results of the opening and closing pressures and their operating durations of valve by AMESim analysis are compared with the results of mathematical methods. In addition, the results of internal flow simulation with FLUENT are utilized to improve the accuracy of valve-modeling. This study will serve as one of reference guides to enhance the developmental efficiency of ventilation-relief valves with the various operating conditionss, which shall be used in Korea Space Launch Vehicle-II.

Analysis of Sensitivity Characteristics with AMESim Model for Piezo Injector (AMESim기반 피에조 인젝터용 해석모델의 민감도 특성 해석)

  • Jo, Insu;Kwon, Jiwon;Lee, Jinwook
    • Transactions of the Korean Society of Automotive Engineers
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    • v.21 no.2
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    • pp.17-25
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    • 2013
  • Performance of DI diesel engine with high fuel injection method is directly related to the emission characteristics and fuel consumption. At present, diesel injection system with piezo element is replacing conventional solenoid type due to their faster electro-mechanical properties. In this study, it was investigated the sensitivity characteristics regarding internal hydraulic modeling based on the AMESim environment of piezo-driven injector The analytic parameter for this study defined such as In/Out orifice, injection hole's diameter and driven voltage on piezo stack. As the results, it was shown that these parameter influence on a fast response characteristics of piezo-driven injector. Also we found fuel pressure recovery time is faster about 0.1 ms due to larger IN orifice diameter. And larger OUT orifice diameter occurs maximum pressure drop with faster its timing of about 0.2 ms.

Verification and Hydraulic Model Development of 3rd Generation Piezo Injector for CRDi System in Passenger Vehicle (승용CRDi용 3세대 피에조 인젝터 유압해석모델 개발 및 검증)

  • Jo, Insu;Jeong, Myoungchul;Lee, Jinwook
    • Transactions of the Korean Society of Automotive Engineers
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    • v.21 no.4
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    • pp.181-187
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    • 2013
  • Performance of DI diesel engine with high fuel injection method is directly related to its emission characteristics and fuel consumption. In this study, numerical model of 3rd generation piezo-driven injector was designed to analyze the hydraulic performance. Also the injection response characteristics was investigated by using the AMESim simulation code. From this study, it was shown that 3rd generation piezo-driven injector had a faster response and had better control capability due to its hydraulic bypass-circuit that has potential to higher hydraulic characteristics and improved accuracy of injected fuel quantity.

Simulation on Characteristics of Constant Power Regulator Systems in Variable Displacement Axial Piston Pump (사판식 가변 용량형 액셜 피스톤 펌프의 일정출력 레귤레이터 특성 시뮬레이션)

  • Lee, J.M.;Park, S.H.;Park, Y.H.;Lee, H.H.
    • Journal of Power System Engineering
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    • v.15 no.2
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    • pp.5-12
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    • 2011
  • In this study, modeling and numerical simulations has been performed to investigate performance characteristics of constant power regulator system for swash plate type axial piston pump. The commercial numerical simulation software, AMESim was applied for analyzing the dynamic behavior of constant power regulator system of swash plate axial piston pump. The validity of simulation model of constant power regulator system is verified by comparing simulation results with experiments. Also, the behavior of main components of constant power regulator system such as spool, sleeve and counterbalance piston is investigated using the results of computer simulation.

Performance Improvement of an Integrated-type Fully-Hydraulic Breaker by Sensitivity Analysis (일체형 순수유압식 브레이커의 민감도해석에 의한 성능 향상)

  • Choi, S.;Chang, H.W.
    • Transactions of The Korea Fluid Power Systems Society
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    • v.6 no.1
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    • pp.17-24
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    • 2009
  • The performance improvement of a small-size integrated-type fully hydraulic breaker is studied in this paper. Mathematical modeling of the breaker is established and verified by experiment. Through sensitivity analysis using AMESim, the key design parameters are selected and nearly optimized to maximize the impact energy as well as to improve the dynamic characteristics such as the piston upper chamber pressure, piston and valve displacements. As a result, the impact energy, blows per minute(bpm) and output power are increased by 52.9%, 1%, and 55.6%, respectively compared with the current design. The dynamic characteristics of the piston upper chamber pressure, piston and valve displacements are also improved by the design change.

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Developing AMESim Model to Find out Process Condition of High Purity Solvent Recovery System (고순도 용제 회수 시스템의 공정 조건 탐색을 위한 AMESim 모델 개발)

  • Kim, Dae Hyun;Joo, Kang Woo;Kim, Kwang Sun
    • Journal of the Semiconductor & Display Technology
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    • v.14 no.4
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    • pp.8-12
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    • 2015
  • As NMP (N-Methyl-2pyrrolidone) is becoming important in many fields, the demand for it is also rising rapidly. With its chemical property of high boiling point, low vapor pressure and high water solubility, it is easy to recover it after processing. Therefore, it is increasingly needed to develop a system that effectively recovers NMP solvent. The study produced a system modeling using AMESim software before developing high purity solvent recovery (HPSR) system to recover NMP solvent. Then, it verified reliability by comparing the simulation model with the test result.