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플러그인 하이브리드 차량의 모드변환에 따른 엔진클러치 접합 제어알고리즘 연구
심규현(Kyuhyun Sim),이수지(Suji Lee),이지석(Ji-Suk Lee),남궁철(Choul Namkoong),한관수(Kwan-Soo Han),황성호(Sung-Ho Hwang) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
In this paper, an engine clutch engagement shock is analyzed during mode change of plug-in hybrid electric vehicles. Multi-driving mode includes EV (electric vehicle) mode, HEV (hybrid electric vehicle) mode and engine operating mode. According to mode change, the engine clutch is engaged or disengaged. A magnitude of shock during clutch engagement is very important because it depends on the vehicle acceleration and clutch synchronizing speed, which affects a ride comfort dominantly. The performance simulator of plug-in hybrid electric vehicle is developed using MATLAB/Simulink. The simulation results show that it needs the mode change control algorithm to minimize a shock during engaging the clutch.
반능동 현가시스템 제어를 적용한 작업용 차량의 응답 특성 분석
심규현(Kyuhyun Sim),염승재(SeungJae Yum),황성호(Sung-Ho Hwang) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
This paper presents a response characteristic analysis of utility vehicle with semi-active suspension system to improve passenger ride comfort. A quarter car model for the vehicle is formulated as state space matrix and its semi-active suspension system is controlled by implementing a skyhook controller and a Linear Quadratic Regulator (LQR). When the vehicle driving a simple bump at constant speed, their results of time domain are shown and their property for the controllers is analyzed. The paper also shows Power spectral density (PSD), frequency results of vertical acceleration, suspension deflection and tire deflection, using an uneven road profile. This simulator is developed as MATLAB/Simulink.
플러그인 하이브리드 차량의 모드변환에 따른 엔진클러치 접합 제어알고리즘 연구
심규현(Kyuhyun Sim),이수지(Suji Lee),남궁철(Choul Namkoong),이지석(Ji-Suk Lee),한관수(Kwan-Soo Han),황성호(Sung-Ho Hwang) 대한기계학회 2016 大韓機械學會論文集A Vol.40 No.9
플러그인 하이브리드 전기자동차는 내연기관과 전기모터를 동력원으로 사용하며 주행 상황에 따라 다양한 주행 모드을 갖는다. 주행 모드에는 전기모터로만 주행하는 EV 모드(전기주행), 내연기관으로 주행하는 엔진 운전 모드, 두 개의 동력원을 이용하는 HEV 모드(하이브리드 주행)가 있다. 특히 병렬형 구조를 갖는 하이브리드 전기자동차는 모드변환에 따라 엔진 클러지가 접합되거나 해제되는데, 클러치 접합 시 나타나는 충격은 차량의 승차감에 영향을 주기 때문에 중요하다. 본 논문에서는 플러그인 하이브리드 전기자동차의 성능 시뮬레이터를 MATLAB/Simulink를 이용하여 개발하고, 시뮬레이션 결과를 통해 엔진 클러치 접합 시 나타나는 충격 특성을 분석하였다. In this paper, engine clutch engagement shock is analyzed during the mode change of plug-in hybrid electric vehicles. Multi-driving mode includes the EV (electric vehicle) mode, HEV (hybrid electric vehicle) mode, and engine operating mode. Depending on the mode change, the engine clutch is either engaged or disengaged. The magnitude of shock during clutch engagement is very important because it impacts vehicle acceleration and clutch synchronization speed, which affects ride comfort substantially. The performance simulator of plug-in hybrid electric vehicles was developed using MATLAB/Simulink. The simulation results show that the mode change control algorithm is necessary for minimizing shock during clutch engagement.
건식 듀얼클러치 변속기의 엔진제어에 따른 변속 성능 분석
오상민(Sang-Min Oh),심규현(Kyuhyun Sim),남궁철(Choul Namkoong),이지석(Ji-Suk Lee),한관수(Kwan-Soo Han),황성호(Sung-Ho Hwang) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
Dry clutch has compact structure, which consists of clutch disk and electric actuator. It doesn’t need lubricant that is necessary for a wet clutch. Therefore, it shows better efficiency as well as fuel economy compared to the wet clutch. However, it is sensitive to the actuating position so it requires deliberate control. If control strategy is not accurate, the wear of the clutch increases and it results in shorter clutch life. Dry dual clutch transmission (DCT) which is composed of twin clutches is the main component in this study. DCT enables smooth shift by preselecting gear-synchronizer. When the shift occurs, engine torque transfers from the off-going clutch to the on-coming clutch. After shift process is completed, angular velocity of engine shaft is synchronized with that of the clutch. When the synchronization occurs, engine throttle is controlled. With the engine control algorithm, crank shaft of engine synchronizes faster than without control and shift quality improves.