Dual Clutch Transmission (DCT)
- What is DCT?
- Combining manual and automatic transmission
- Two clutches are engaged alternatively for different speeds and power transmission continues during a shift through the control of clutch engagement condition
- Components
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- Powertrain Model
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- Motor Actuator
- Target command generation
- Position tracking controller
- Motor Actuator
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- Dry Clutch
- High transmission efficiency
- Uncertainties are causes by fluid viscosity change
- Dry Clutch
- Self-energizing clutch actuator
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- Conventional clutch actuator
- Mechanism based on conventional manual transmission with diaphragm spring
- Requires high-power motor
- Requires carefully-designed controller for synchronous control of the two clutches
- Conventional clutch actuator
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- Novel clutch actuator
- Part of energy loss during clutch slip is used in favor of clutch engagement; higher actuation efficiency is obtained.
- Elimination of the diaphragm spring
- Reduction of motor power requirement
- Easier synchronous control: self-energization in the on-coming clutch and de-energization in the off-going clutch
- Novel clutch actuator
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- Self-energizing effect during clutch engagement
- Control objective and controller structure
- Objective of research
- Precise control of clutch torque
- Reduction of actuation energy
- Minimizing launch/shift jerk
- Fast shifting
- Objective of research
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- Controller block diagram
- Experiment equipment
- Dynamo with coaxial-type self-energizing clutch actuator and dry clutch
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- Dynamo with hydraulic clutch actuator and wet clutch
Publications
o Dynamo with hydraulic clutch actuator and wet clutch
- Jinsung Kim, Seibum Choi, "Nonlinear Torque Observer for a Self-Energizing Clutch Actuator Using a Reaction Torque Estimation Approach",, IEEE/ASME Transactions on Mechatronics,2014
- Jiwon Oh, Jinsung Kim, Seibum Choi, "Driveline Modeling and Estimation of Individual Clutch Torque during Gear Shifts for Dual Clutch Transmission ,", Mechatronics, 2014
- Jiwon Oh, Seibum Choi, "Real-time Estimation of Transmitted Torque on Each Clutch for Ground Vehicles with Dual Clutch Transmission,", IEEE/ASME Transactions on Mechatronics,Nov. 2014
- Jiwon Oh, Jinsung Kim, and Seibum B. Choi, "Robust Feedback Tracking Controller Design for Self-energizing Clutch Actuator of Automated Manual Transmission", SAE International Journal of Passenger Cars-Mechanical Systems, 2013.
- Jinsung Kim, Seibum B. Choi, "Design and Modeling of Clutch Actuator System using Self-energizing Effect", IEEE/ASME Transaction on Mechatronics, Vol. 16, No. 5, pp. 953-966, 2011.
o Conference
- Jiwon Oh, and Seibum Choi, “Design of Hybrid Position/Force Engagement Controller for Dry Dual Clutch Transmission without Diaphragm Spring”, in Proceedings of American Control Conference 2014, Portland, USA
- Jiwon Oh, Jinsung Kim, Seibum Choi, "Design of Dry Dual Clutch Transmission Actuator Controller for Simultaneous Kissing Point Identification Using Multiple Sliding Surfaces", in Proceedings of 13th International Conference on Control, Automation and Systems 2013, Gwangju, Korea.
- Jinsung Kim, Jiwon Oh, Seibum B. Choi,"Nonlinear Estimation Method of a Self-Energizing Clutch Actuator Load", in Proceedings of International Conference on Innovative Engineering Systems 2012, Alexandria, Egypt.
- Jinsung Kim, Seibum B. Choi, Heerak Lee, Jaeuk Koh, "Design of a Robust Internal-loop Compensator of Clutch Positioning Systems", in Proceedings of IEEE Multi-Conference on Systems and Control 2012, Dubrovnik, Croatia.
- Jinsung Kim, Seibum B. Choi, “Adaptive Force Control of Automotive Clutch Actuator System with Self-Energizing Effect”, Proceedings of 18th IFAC World Congress, Milano, Italy, 2011.
- Jinsung Kim, Kwanghyun Cho, Seibum B. Choi, “Gear Shift Control of Dual Clutch Transmissions with a Torque Rate Limitation Trajectory”, Proceedings of 2011 American Control Conference, San Francisco, CA.
- Jinsung Kim, Seibum B. Choi, "Control of Dry Clutch Engagement for Vehicle Launches Via a Shaft Torque Observer", in Proceedings of 2010 American Control Conference, Baltimore, MD.
- Jinsung Kim, Seibum B. Choi, "Self-energizing Clutch Actuator System: Basic Concept and Design", in Proceedings of FISITA 2010 World Automotive Congress, Budapest, Hungary.
- Jinsung Kim, Seibum B. Choi, Heerak Lee, Jiwoo Kang, Mandae Hur, ""System Modeling and Control of a Clutch Actuator System for Dual Clutch Transmissions", 한국자동차공학회 2011 정기학술대회 논문집, 대전컨벤션센터, pp. 1253 - 1257
- 김진성, 최세범, ""차량구동계 모델링 및 동적 시뮬레이션에 관한 연구", 한국자동차공학회 2009 정기학술대회, 인천 컨벤시아, 2009
- 김진성, 최세범, "듀얼클러치변속기를 위한 클러치 액추에이터의 설계 및 제어", 한국자동차공학회 추계학술대회 2008년 논문집, 2008
- 조이형, 최세범, "듀얼클러치 변속기의 변속 성능 향상을 위한 Sliding Mode 제어기 개발", 한국자동차공학회 추계학술대회 2007년 논문집 Vol.2, pp.975~981, 2007