Design and validation of clutch-to-clutch shift actuator using dual-wedge mechanism

Chen, Li; Liu, Fengyu; Yao, Jian; Zhao, Ding; Lee, Chunhao; Kao, Chi-Kuan; Samie, Farzad; Huang, Ying; Yin, Chengliang

doi:10.1016/j.mechatronics.2017.01.004

Cited by 5 publications

(4 citation statements)

References 15 publications

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“…As indicated by (5), the clutch transmitted torque T c can be actively controlled only in the slipping stage by applying a proper normal force F n , while the other two stages cannot be controlled by the normal force F n . That is, the clutch torque T c is zero in the open stage and can be any value within the range defined by the normal force F n due to the static friction in the locked stage.…”

Section: Powertrain Modelmentioning

confidence: 99%

“…Automatic clutches are key enablers for various automatic transmissions in vehicles, such as automated manual transmissions, hydraulic automatic transmissions, and electric variable transmissions [1][2][3]. Due to the piecewise nonlinearity of the friction torque generated on the clutch plates, the clutch engagement control has to handle the three phases from open to slipping, and then to locked [4,5]. As required by the dynamic performance of vehicles, the engagement process should be completed in as short a period as possible [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Scheduling Period Selection Based on Stability Analysis for Engagement Control Task of Automatic Clutches

Zhao

Chen

et al. 2021

Applied Sciences

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The clutch engagement process involves three phases known as open, slipping, and locked and takes a few seconds. The engagement control program runs in an embedded control unit, in which discretization may induce oscillation and even instability in the powertrain due to an improper scheduling period for the engagement control task. To properly select the scheduling period, a methodology for control–scheduling co-design during clutch engagement is proposed. Considering the transition of the friction state from slipping to being locked, the co-design framework consists of two steps. In the first step, a stability analysis is conducted for the slipping phase based on a linearized system model enveloping the driving and driven part of the clutch, feed-forward and feedback control loop together with a zero-order signal hold element. The critical period is determined according to pole locations, and factors influencing the critical period are investigated. In the second step, real-time hardware-in-the-loop experiments are carried out to inspect the dynamic response concerning the friction state transition. A sub-boundary within the stable region is found to guarantee the control performance to satisfy the engineering requirements. In general, the vehicle jerk and clutch frictional loss increase with the increase in the scheduling period. When the scheduling period is shorter than the critical period, the rate of increase is mild. However, once the scheduling period exceeds the critical period, the rate of increase becomes very high.

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Section: Powertrain Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Scheduling Period Selection Based on Stability Analysis for Engagement Control Task of Automatic Clutches

Zhao

Chen

et al. 2021

Applied Sciences

Self Cite

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“…The function is to adjust the power that is transmitted from the engine to the transmission and then the transmission changes the machine speed as desired. The way it works is to disconnect and connect transmission rotation in quick, smooth and gentle manner (Chen et al, 2017) taking into account the coefficient of friction (slip) (Arndt, Tarasow, Bohn, Wachsmuth, & Serway, 2016) to provide comfort for the riders (p.80). In addition, the purpose of clutch is also to reduce the time of gearshift and smooth clutching process without any torque reduction (van Berkel, Hofman, Serrarens, & Steinbuch, 2014).…”

Section: Education Media For Clutchmentioning

confidence: 99%

Education media development for clutch (EMC) in vocational education: the concept of clutch work

Nurtanto

2018

jpv

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This development research aims to describe the working concept of EMC with VPE valuation method. The EMC quality is based on following aspects: (1) valid according to experts; (2) practical according to practitioners; and (e) effective based on students ability test. The developed cycles and procedures refer to the ADDIE model (analysis, design, development, implementation, and evaluation). Data was collected using rating scale sheet (1-5) and percentage of learning using EMC outcomes. The research results show that the valid and practical aspects of the category are valid and practical enough with an average score of 3.68 (73.6%) and 3.75 (75.0%) respectively. While the results of the effective test obtained an average score of 3.74 (74.8%) and the competence test results is 80.51%. The advantages of EMC are attractive design, practical size, and ease of use (user-friendly). Students recommend that they enjoy learning with EMC and it supports learning about chassis.

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“…To reveal the influences of driving motor and shift mechanism on the gear shifting performance of AT, a multi-body dynamics model is introduced in [19] to depict the transient behavior of the AT system during gear shifting. In [20], a novel dual-wedge shift actuator is introduced for attaining the self-reinforcement by choosing proper working slopes. By this manner, the self-weakening effect is avoided, and consequently the shifting duration is shortened.…”

Section: Introductionmentioning

confidence: 99%

Design, Control, and Validation of Two-Speed Clutchless Automatic Transmission for Electric Vehicle

Liu

Xie

Qin

et al. 2022

IEEE/ASME Trans. Mechatron.

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Two-speed or multiple-speed automatic transmissions can obviously improve the overall manipulating performance in terms of shifting quality and energy efficiency when equipped in electric vehicles (EVs). This study details the design of a two-speed clutch-less automatic transmission (2AT) for EVs and the motor controlled shifting mechanism. Firstly, a novel two-speed clutch automatic transmission is devised with a motor-controlled shifting mechanism, which enables the shift motions and the speed control of the driving motor for synchronization during shifts. Secondly, a coordinated control strategy of the driving motor and controlling motor for shifting is detailed during different shifting processes to achieve fast and smooth shifting. The torque trajectory optimization during synchronizing process is attained by applying the Pontryagin's minimum principle. The simulation and experimental results verify the shifting mechanism design and the shift control algorithm in terms of shift response and smoothness for the designed 2AT.Index Terms-Coordinated control, electric vehicles (EVs), gear shifting control, two-speed automatic transmission (2AT).

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Design and validation of clutch-to-clutch shift actuator using dual-wedge mechanism

Cited by 5 publications

References 15 publications

Scheduling Period Selection Based on Stability Analysis for Engagement Control Task of Automatic Clutches

Scheduling Period Selection Based on Stability Analysis for Engagement Control Task of Automatic Clutches

Education media development for clutch (EMC) in vocational education: the concept of clutch work

Design, Control, and Validation of Two-Speed Clutchless Automatic Transmission for Electric Vehicle

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