• Title/Summary/Keyword: Automated clutch

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DEVELOPMENT OF AUTOMATIC CLUTCH ACTUATOR FOR AUTOMATED MANUAL TRANSMISSIONS

  • MOON S. E.;KIM H. S.;HWANG S. H.
    • International Journal of Automotive Technology
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    • v.6 no.5
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    • pp.461-466
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    • 2005
  • With the growing traffic density and increasing comfort requirements, the automation of the drive train has gained importance in vehicles. The automatic clutch actuation relieves a driver especially in urban and stop-and-go traffic environments. In this paper, an electro-mechanical actuator for clutch-by-wire (CBW) system is implemented as the first stage for the development of automated manual transmissions. The prototype of the automatic clutch actuator is designed systematically, which is composed of the electric motor, worm and worm wheel, and crank mechanism. A test rig is developed to perform the basic function test for the automatic clutch actuation. The developed prototype is validated by the experimental results performed on the test rig.

Design and Control of Clutch-by-wire System for Automated Manual Transmissions

  • Hwang, Sung-Ho;Kim, Hyun-Soo;Moon, Sang-Eun;Han, Kwan-Soo
    • 제어로봇시스템학회:학술대회논문집
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    • 2004.08a
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    • pp.372-376
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    • 2004
  • With the growing traffic density and increasing comfort requirements, the automation of the drive train will gain importance in vehicles. The automatic clutch actuation relieves the drivers especially in urban driving and stop-and-go traffic conditions. In this paper, an electro-mechanical actuator for clutch-by-wire (CBW) system is implemented as the first stage for the development of automated manual transmissions. The prototype of CBW actuator is designed systematically, which is composed of the electric motor, worm & worm wheel and crank mechanism. And the test rig is developed to perform the basic function test for the automatic clutch actuation. The developed prototype is validated by the experimental results on the test rig.

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Analysis on the Clutch Torque of Automated Manual Transmission Vehicle during Dynamometer Test (동력계 시험을 이용한 자동화 수동변속차량의 클러치 토크 분석)

  • Choi, Woo-Seok;Lim, Wonsik;Oh, Ducksoo;Park, Sung-cheon
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.24 no.3
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    • pp.287-293
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    • 2015
  • With the rise in oil prices and ongoing concerns about environment, there is an increased amount of interest in automated manual transmission (AMT) vehicles. Torque control in an AMT vehicle is attained by controlling the displacement of the dry-type clutch's actuator. To provide good ride comfort akin to that of an automatic transmission vehicle, the clutch control is vital to an AMT vehicle. In this study, a method of obtaining the clutch torque from a dynamometer test is devised. This method is able to identify the relationship between the displacement of the clutch actuator and the clutch torque. A simulator for estimating the performance of an AMT vehicle is developed using MATLAB Simulink. The results obtained from both the vehicle and simulation exhibit a similar trend.

A Study on the Speed-based Active Compensation of the Kiss-Point of Dry-type Clutch Equipped with Automated Manual Transmission (자동화 수동변속기용 건식클러치의 속도기반 Kiss-Point 능동 보상에 관한 연구)

  • Choi, Woo-Seok;Lee, Kyo-Bum;Lim, Wonsik
    • Transactions of the Korean Society of Automotive Engineers
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    • v.24 no.3
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    • pp.372-378
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    • 2016
  • Clutch torque control is the key to the ride comfort improvement of a vehicle equipped with AMT (automated manual transmission). For such control, the torque transfer starting point, known as the "kiss point," should be indicated or at least estimated to compensate for the clutch torque. The kiss point changes due to wear, high temperature, and fatigue; as such, it should be estimated while the vehicle is being driven. In this study, the method of kiss point active estimation for an AMT vehicle with a dry-type clutch was devised. The kiss point is learned while the engine is in an idle state and while the transmission is at a neutral gear position. It is determined when the input shaft of the transmission starts to rotate by slowly engaging the clutch. The noise of the shaft speed signal during the slow engagement process is filtered for accurate control. The kiss point estimation at various clutch engagement speeds was analyzed via a vehicle test.

ENHANCED FUZZY SLIDING MODE CONTROLLER FOR LAUNCH CONTROL OF AMT VEHICLE USING A BRUSHLESS DC MOTOR DRIVE

  • Zhao, Y.S.;Chen, L.P.;Zhang, Y.Q.;Yang, J.
    • International Journal of Automotive Technology
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    • v.8 no.3
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    • pp.383-394
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    • 2007
  • Due to the clutch's non-linear dynamics, time-delays, external disturbance and parameter uncertainty, the automated clutch is difficult to control precisely during the launch process or automatic mechanical transmission (AMT) vehicles. In this paper, an enhanced fuzzy sliding mode controller (EFSMC) is proposed to control the automated clutch. The sliding and global stability conditions are formulated and analyzed in terms of the Lyapunov full quadratic form. The chattering phenomenon is handled by using a saturation function to replace the pure sign function and fuzzy logic adaptation system in the control law. To meet the real-time requirement of the automated clutch, the region-wise linear technology s adopted to reduce the fuzzy rules of the EFSMC. The simulation results have shown hat the proposed controller can achieve a higher performance with minimum reaching time and smooth control actions. In addition, our data also show that the controller is effective and robust to the parametric variation and external disturbance.

Design and Implementation of Clutch-by-wire System for Automated Manual Transmissions (자동화 수동 변속기의 CBW 시스템 개발)

  • Moon, Sang-Eun;Kim, Min-Sung;Yeo, Hoon;Song, Han-Lim;Han, Kwan-Soo;Kim, Hyun-Soo;Hwang, Sung-Ho
    • Transactions of the Korean Society of Automotive Engineers
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    • v.12 no.4
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    • pp.119-128
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    • 2004
  • With the growing traffic density and increasing comfort requirements, the automation of the drive train will gain importance in vehicles. The automatic clutch actuation relieves the drivers especially in urban driving and stop-and-go traffic conditions. This paper describes the dynamic modeling of a clutch actuator and clutch spring. The dynamic model of the clutch system is developed using MATLAB/Simulink, and evaluated by experimental data using a test rig. This performance simulator is useful to develop the clutch-by-wire (CBW) system for an automated manual transmission (AMT). The electro-mechanical type CBW system is also implemented as an automatic clutch for AMT. The prototype of CBW system is designed and implemented systematically, which is composed of an electric motor, worm gear and slider-crank mechanism. The test rig is developed to perform the basic function test of the automatic clutch, and the developed prototype is validated by the experimental data on the test rig.

Axial Stiffness Analysis of a Clutch Diaphragm Spring in Passenger Cars (승용차용 클러치 다이아프램 스프링의 축방향 강성해석)

  • Kim, J.Y.;Kim, J.G.;Yoon, H.J.
    • Journal of Power System Engineering
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    • v.14 no.6
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    • pp.35-40
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    • 2010
  • This article deals with the numerical analysis results of stiffness of diaphragm spring used in the clutch of a manual transmission. In order to investigate the relationship of the force and displacement in a diaphragm spring, we have established a numerical model of diaphragm spring using a well-known analytic model of Belleville spring and a cantilever beam model for the finger part of diaphragm spring. Using the stress and strain relations of Belleville spring and cantilever beam, we propose the analytic equation of motion of diaphragm spring for the use of a clutch automated actuator in an automated manual transmission. The proposed analytic model represents the typical dynamic characteristics of diaphragm spring along with the release bearing travel. And it is characterized in a closed-form equation, therefore it can be used for the further study of development of actuator and control law of clutch automating mechanism.

Development of Automated Mechanical Transmission Model to Evaluate TCU Control Logic (TCU 제어로직 평가를 위한 AMT 모델 개발)

  • Oh, Joo-Young;Song, Chang-Sub
    • Journal of the Korean Society for Precision Engineering
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    • v.27 no.3
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    • pp.118-126
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    • 2010
  • The automated mechanical transmission(AMT) is composed of electronic control management(ECM) and automatic shift gear(ASG). The AMT has advantages which are high efficiency of manual transmissions(MT) and offer operation convenience similar to automatic transmissions(AT). However, it has defects that are the torque gap during gear shift transients and shift time is long. To reduce such defects, it is necessary practically to evaluate error and characteristics as developing simulation model before the control algorithm is applied. In this paper, models are composed of vehicle model and AMT shift control model. Particularly AMT shift control model consists of main clutch management model (MCM) and shift control management model(SCM). The developed models were verified by comparing the simulated and experimental results under the same operational conditions. It can also be used to evaluate shift algorithm.

Characteristics of transmission control of an AMT vehicle (AMT 차량의 변속제어 특성에 관한 연구)

  • Kong Jin-Young;Song Chang-Seop
    • Journal of the Korean Society for Precision Engineering
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    • v.23 no.3 s.180
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    • pp.86-93
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    • 2006
  • This study is concerned with the investigation of characteristics of an AMT (Automated Manual Transmission) which are composed of clutch part and transmission part. When a shilling signal is received from the controller, the clutch is disengaged first, and shifting action including selecting action is followed, and then the clutch is engaged last. The characteristics of transmission shifting response are affected by various parameters of clutch and transmission control elements. Analytical results are in fair agreement with experimental results. It is found that the operating pressure level is the most important for the response of AMT characteristics, and that the other parameters such as natural frequency and damping ratio of the control valve are less important.

A Study on the Design Paramter of a Hydraulic Shift Actuator of an AMT (자동화 수동변속기의 변속 조작용 유압 액츄에이터의 설계 변수에 관한 연구)

  • Song, Chang-Seop;Lee, Sang-Hyun
    • Journal of the Korean Society for Precision Engineering
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    • v.24 no.10
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    • pp.75-82
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    • 2007
  • The AMT(Automated Manual Transmission) has been developed by utilizing the auto clutch system and the automatic shift mechanism, to automate the clutch operation and shift operation of the existing MT(Manual Transmission). The use of hydraulic actuator for each actuator of the clutch and gear has realized a reduction of fuel consumption and exhaust emission. In this paper, we develop a simulator for the transmission control system of the AMT using AMESim. The developed simulator can be applied to design the hydraulic select actuator system of an AMT.