Concept evaluation of a novel gear selector for automated manual transmissions

Zhong, Zaimin; Kong, Guanglin; Yu, Zhuoping; Chen, Xinbo; Chen, Xueping; Xin, Xiangyan

doi:10.1016/j.ymssp.2012.02.008

Cited by 32 publications

(17 citation statements)

References 8 publications

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“…The tractor used in this study is equipped with a single disc friction clutch, which is composed of components such as a release fork, release bearing, diaphragm spring, pressure plate, and clutch disc, as shown in Figure 3a. Clutch operation is largely divided into disengagement and engagement [40]. When the operator presses the clutch pedal, the central part of the diaphragm spring is pushed in the direction of the clutch disc by the release fork and release bearing.…”

Section: Clutch Actuatormentioning

confidence: 99%

Development of Control System for Automated Manual Transmission of 45-kW Agricultural Tractor

Kim

et al. 2020

Applied Sciences

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This study aims to develop and evaluate an automated manual transmission (AMT) for agricultural tractors with high efficiency and high convenience by using electric actuators. An AMT system to control manual-type shuttle gearboxes and transmissions for tractors is developed by adding a shuttle shifting actuator, a clutch actuator, and a control system to a conventional manual transmission (MT). The clutch actuator is designed using an electric motor and a reduction gear. The AMT control system is developed and experimental tests are conducted to evaluate the performance of the AMT. The results of the performance of the actuator position control demonstrate that the shuttle shifting actuator and clutch actuator are controlled appropriately, achieving a maximum overshoot of less than 5% and 0%, a settling time of less than 0.500 s and 1.50 s, and a steady-state error of less than 1% and 1%, respectively. The performance of the automatic forward and reverse control demonstrates a shift control time of less than 2.50 s and target revolutions per minute (RPM) reaching time of less than 3.00 s. Thus, AMT systems for tractors can be easily developed by applying shuttle shifting actuators, clutch actuators, and a control system to conventional manual transmissions.

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Section: Clutch Actuatormentioning

confidence: 99%

Development of Control System for Automated Manual Transmission of 45-kW Agricultural Tractor

Kim

et al. 2020

Applied Sciences

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“…The magnitude of the resistance force, F L , is a function of the contact angle between the strut salient and the detent annulus (θ), the coefficient of friction between the contact surface (μ), the stiffness coefficient of the spring (κ), and the compressed displacement of the spring (ε). The shift load can be derived as follows [14]:…”

Section: Second Stage Presentationmentioning

confidence: 99%

Advanced shifting control of synchronizer mechanisms for clutchless automatic manual transmission in an electric vehicle

Tseng

2015

Mechanism and Machine Theory

113

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“…2,3 For this reason, several types and structures of the two-speed gearbox transmission system are proposed for the drive train system of EVs. Among these two-speed transmissions, the simulation and experiments on the two-speed automated manual transmission (AMT) are studied, 4,5 and an inverse AMT with the dry clutch located at the rear of the transmissions is introduced to obtain a seamless gear shifting and to avoid the traction interruption of traditional AMT. [6][7][8] Also, a two-speed continuously variable transmission (CVT) and a two-speed dual-clutch transmission (DCT) were compared with the manual transmission (MT) using simulations on several standard drive cycles and found that both the two-speed DCT and simplified CVT improve the overall power train efficiency.…”

Section: Introductionmentioning

confidence: 99%

Design, analysis, and experimental validation of a novel seamless automatic transmission for electric vehicle

Yao

Ren

Yan

et al. 2018

Advances in Mechanical Engineering

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The transmission system has an important influence on the dynamic performance, endurance mileage, and energy saving in an all-electric vehicle. This article proposes an innovative two-speed seamless dry-friction automatic transmission system to improve the dynamic performance and endurance mileage of an all-electric vehicle with the existing battery technology. The proposed system consists of two-stage epicyclical gear sets without outer ring gears, a dry-friction clutch, and a brake band, realizes a seamless shifting between any two speeds in an electric vehicle. Based on the working principle and dynamic modeling of the proposed seamless dry-friction automatic transmission system, the ratio optimization was carried out to improve the dynamic performance and the power consumption at the same time, and the combination of the weight ratio method and the multi-island genetic algorithm method was introduced to solve the optimization problem. It is shown both theoretically and experimentally that the proposed seamless dry-friction automatic transmission method demonstrates a better dynamic performance and shifting comfort when compared to the automated manual transmission with same transmission ratio.

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Concept evaluation of a novel gear selector for automated manual transmissions

Cited by 32 publications

References 8 publications

Development of Control System for Automated Manual Transmission of 45-kW Agricultural Tractor

Development of Control System for Automated Manual Transmission of 45-kW Agricultural Tractor

Advanced shifting control of synchronizer mechanisms for clutchless automatic manual transmission in an electric vehicle

Design, analysis, and experimental validation of a novel seamless automatic transmission for electric vehicle

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