Fork-less two-speed I-AMT with overrunning clutch for light electric vehicle

Yue, Hanqi; Zhu, Chenyi; Gao, Bingzhao

doi:10.1016/j.mechmachtheory.2018.08.019

Cited by 26 publications

(12 citation statements)

References 22 publications

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“…-Shifting mechanism was not explained in details. The latest works related to gearshifting mechanism and its control are described in [41][42][43][44][45][46][47][48][49][50]. Researchers in [41][42][43] argued that criteria for the EV motor to operate efficiently is not just the application of the multispeed discrete transmission but also smooth gearshifting process with minimum jerking and actuation power usage.…”

Section: Multispeed Discrete Transmissionmentioning

confidence: 99%

“…Subsequent research work performed to analyze the performance of shifting mechanism was described in [47,48], where a two-speed dry clutch inverse AMT (I-AMT) was Another novel synchronizer design that featured springs inside it was also presented in [45]. Meanwhile, the work in [46] reported the optimization of the gearshifting with the objectives to minimize shifting time, friction work, due to the engagement and disengagement of the clutch during shifting, and jerking.…”

Section: Multispeed Discrete Transmissionmentioning

confidence: 99%

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Review of the Methods to Optimize Power Flow in Electric Vehicle Powertrains for Efficiency and Driving Performance

et al. 2022

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Electric vehicles (EV) are quickly gaining a foothold in global markets due to their zero tailpipe emissions and increasing practicality in terms of battery technologies. However, even though EV powertrains emit zero emissions during driving, their efficiency has not been fully optimized, particularly due the commonly used single-speed transmission. Hence, this paper provides an extensive review on the latest works carried out to optimize the power flow in EV powertrains using multispeed discrete transmission, continuously variable transmission and multi-motor configurations. The relevant literatures were shortlisted using a keyword search related to EV powertrain in the ScienceDirect and Scopus databases. The review focused on the related literatures published from 2018 onwards. The publications were reviewed in terms of the methodologies applied to optimize the powertrain for efficiency and driving performance. Next, the significant findings from these literatures were discussed and compared. Finally, based on the review, several future key research areas in EV powertrain efficiency and performance are highlighted.

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Section: Multispeed Discrete Transmissionmentioning

confidence: 99%

Section: Multispeed Discrete Transmissionmentioning

confidence: 99%

Review of the Methods to Optimize Power Flow in Electric Vehicle Powertrains for Efficiency and Driving Performance

et al. 2022

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“…The overrunning clutch 27 brings the possibility of reducing the driving source. Overrunning clutches are often used in automated transmission applications, such as vehicle shifting, 28,29 joint torque transmission, 30 rotary actuators, 31 and so on. In these applications, overrunning clutches are used for excellent torque and speed control to achieve the required torque/speed stability.…”

Section: Introductionmentioning

confidence: 99%

A low-cost single-motor-driven climbing robot based on overrunning spring clutch mechanisms

Liu

Yang

Wang

et al. 2022

International Journal of Advanced Robotic Systems

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Forestry monitoring and high-voltage cable inspection demand on low-cost climbing robots. The proposed climbing robot has simple control and low cost, enabling loaded, which drives by a single motor. Based on the overrunning spring clutch mechanisms, two motions of holding and climbing are realized by one motor. A rope-driven gripper is for adaptive enveloping holding effectively and a thron wheel is used to attach the climbing surface and stable climbing. The design parameters of the overrunning spring clutch mechanism and the rope-driven gripper are determined. The prototype and experiment setup are built. The enveloping holding experiment is carried out to verify the holding stability and shape adaptability of the rope-driven gripper. The trunk and pipe climbing experiments verify the climbing performance of the climbing robot and its application prospects with a certain load. In the future, as a low-cost climbing robot, a camera or operating mechanism can be equipped for tasks.

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“…In [10], a twospeed uninterrupted mechanical transmission (UMT) composed of a planetary gear set, brake belt, and centrifugal clutch that realized seamless switching between two gears was proposed. In [11], a fork-less two-speed AMT (I-AMT) with a dry clutch was proposed, without torque interruption during gear shifting.…”

Section: Introductionmentioning

confidence: 99%

In-Wheel Two-Speed AMT with Selectable One-Way Clutch for Electric Vehicles

Meng

Wang

et al. 2021

Actuators

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To improve the efficiency of the electric vehicle (EV) drive systems and EV performance, the use of multi-speed transmissions and distributed drives has been studied extensively. In addition, to develop efficient and compact drive systems, new clutch solutions are needed. In this paper, we propose an in-wheel two-speed automatic mechanical transmission (IW-AMT) with a selectable one-way clutch (SOWC). The IW-AMT consists of a high-speed motor and a mechanical shift actuator, and it can realize shifting without power interruption, thus effectively reducing the unsprung mass and the technical specifications of the motor. We established a virtual prototype model of the IW-AMT to show the shifting process and evaluate the quality of shifting. The simulation results of the upshifting process indicated that the vehicle torque and velocity changed smoothly, and the maximum jerk is less than 10 m/s3. Furthermore, to improve the jerk induced by the downshifting process, we analyzed the momentary state of the SOWC struts that are dropped and attempted to improve the jerk from two aspects: improving the wet multi-plate clutch (WMPC) combination curve and improving the SOWC structure. The results indicated that the downshift-induced jerk can be reduced to 13 m/s3.

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Fork-less two-speed I-AMT with overrunning clutch for light electric vehicle

Cited by 26 publications

References 22 publications

Review of the Methods to Optimize Power Flow in Electric Vehicle Powertrains for Efficiency and Driving Performance

Review of the Methods to Optimize Power Flow in Electric Vehicle Powertrains for Efficiency and Driving Performance

A low-cost single-motor-driven climbing robot based on overrunning spring clutch mechanisms

In-Wheel Two-Speed AMT with Selectable One-Way Clutch for Electric Vehicles

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