Design and Experimental Demonstration of a Seamless Automated Manual Transmission using an Eddy Current Torque Bypass Clutch for Electric and Hybrid Vehicles

Lacerte, Marc-Olivier; Pouliot, Gabriel; Plante, Jean‐Sébastien; Micheau, Philippe

doi:10.4271/2015-01-9144

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…Internal combustion engine have a very narrow peak of efficient power transmission and thus must absolutely be equipped with variable transmission. For electric motorizations, the idea of using multiple gear ratios to improve efficiency and power density has also been explored [2] [3]. While power-trains type of variable transmission provide effective solutions for torque-speed matching, they are not adapted to the robotic context.…”

Section: Introductionmentioning

confidence: 99%

A Fast Gear-Shifting Actuator for Robotic Tasks with Contacts

Girard¹,

Asada²

2022

Preprint

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Vehicle power-trains use a variable transmission (multiple gear-ratios) to minimize motor size and maximize efficiency while meeting a wide-range of operating points. Robots could similarly benefit from variable transmission to save weight and improve energy efficiency; leading to potentially groundbreaking improvements for mobile and wearable robotic systems. However, variable transmissions in a robotic context leads to new challenges regarding the gear-shifting methodology: 1) order-of-magnitude variations of reduction ratios are desired, and 2) contact situations during manipulation/locomotion tasks lead to impulsive behavior at the moment when gear-shifting is required. This paper present an actuator with a gear-shifting methodology that can seamlessly change between two very different reduction ratios during dynamic contact situations. Experimental results demonstrate the ability to execute a gear-shift from a 1:23 reduction to a 1:474 reduction in less than 30ms during contact with a rigid object.

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Section: Introductionmentioning

confidence: 99%

A Fast Gear-Shifting Actuator for Robotic Tasks with Contacts

Girard¹,

Asada²

2022

Preprint

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“…Authors in [18][19][20][21][22][23] made various belt testing on belt test benches. Tests were focused on evaluation of power transmission efficiency of belts, impact of belt tensioning [18], belt roughness [19], low and time-varying velocity and transversal vibration performance [20], failure analysis based on vibrations [21].…”

Section: Introductionmentioning

confidence: 99%

“…Tests were focused on evaluation of power transmission efficiency of belts, impact of belt tensioning [18], belt roughness [19], low and time-varying velocity and transversal vibration performance [20], failure analysis based on vibrations [21]. Some of mentioned studies were performed on belt test benches of different complexity for example [18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

V-belts and Their Performance Resulting Fromtheir Inner Hybrid Structure

2020

International Journal of Mechanics

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Paper provides a study and comparison ofnarrow and classical cross-sections of five V-belts withdifferent inner structure, material composition and shape.The performance is evaluated by non-contact monitoringof transversal vibration velocity together with belttemperature caused by friction and vibrations at variousoperational states when changing the loading, revolutionsof driver pulley and tensioning force. Moreover, thevibration regimes are observed. The study presentswhether concave sides, adhesion layer, higher compressioncore, transverse reinforcing fibers, notches, wrap ofprofile, naked belt sides cause the different performance.

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Evaluation of Transmission Losses of Various Battery Electric Vehicles

2022

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Transmission losses in battery electric vehicles have compared to internal combustion engine powertrains a larger share in the total energy consumption and play therefore a major role. Furthermore, the power flows not only during propulsion through the transmissions, but also during recuperation, whereby efficiency improvements have a double effect. The investigation of transmission losses of electric vehicles thus plays a major role. In this paper, three simulation models of the Institute of Automotive Engineering (the lossmap-based simulation model, the modular simulation model, and the 3D simulation model) are presented. The lossmap-based simulation model calculates transmission losses for electric and hybrid transmissions, where three spur gear transmission concepts for battery electric vehicles are investigated. The transmission concepts include a single-speed transmission as a reference and two two-speed transmissions. Then, the transmission lossmaps are integrated into the modular simulation model (backward simulation) and in the 3D simulation model (forward simulation), which improves the simulation results. The modular simulation model calculates the optimal operation of the transmission concepts and the 3D simulation model represents the more realistic behavior of the transmission concepts. The different transmission concepts are investigated in Worldwide Harmonized Light Vehicle Test Cycle and evaluated in terms of transmission losses as well as the total energy demand. The map-based simulation model allows the transmission losses to be broken down into the individual component losses, thus allowing transmission concepts to be examined and evaluated in terms of their efficiency in the early development stage to develop optimum powertrains for electric axle drives. By considering transmission losses in detail with a high degree of accuracy, less efficient concepts can be eliminated at an early development stage. As a result, only relevant concepts are built as prototypes, which reduces development costs.

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Design and Experimental Demonstration of a Seamless Automated Manual Transmission using an Eddy Current Torque Bypass Clutch for Electric and Hybrid Vehicles

Cited by 5 publications

References 24 publications

A Fast Gear-Shifting Actuator for Robotic Tasks with Contacts

A Fast Gear-Shifting Actuator for Robotic Tasks with Contacts

V-belts and Their Performance Resulting Fromtheir Inner Hybrid Structure

Evaluation of Transmission Losses of Various Battery Electric Vehicles

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