The Design of Transmission Scheme of the 6-Speed Automatic Transmission Based on the 01N Automatic Transmission

You, Min; Qin, Wen; Zheng, Ming Feng

doi:10.4028/www.scientific.net/amr.605-607.1217

Cited by 2 publications

(1 citation statement)

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“…engine or motor) efficiency. Nowadays, most transmissions, including manual or automated manual transmissions (MT or AMT), 1 hydraulic automatic transmissions (AT), 2 dual clutch transmissions (DCT), 3 and the emerging electric variable transmissions (EVT) in hybrid electric vehicles, 4 provide multi gear ratios and change the gear ratios by manipulating clutches. 5 In MT and AMT, one dry clutch is employed to implement the gear shift; however, power flow interruption is inevitable due to the disengagement of the single clutch.…”

Section: Introductionmentioning

confidence: 99%

Design, modeling, and analysis of wedge-based actuator with application to clutch-to-clutch shift

Liu

Chen

Yao

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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Clutch-to-clutch shift technology is a key enabler for fast and smooth gear shift process for multi gear transmissions. However, conventional hydraulic actuation systems for clutches have drawbacks of low efficiency, oil leakage and inadequate robustness. Electromechanical devices offer potential alternative actuators. In this paper, a novel motor driven wedge-based clutch actuator, featuring self-reinforcement, is proposed. The design concept and physical structure are thoroughly described. Dynamic models for the actuation system and vehicle powertrain are validated by experiments. Upshift and downshift processes at different engine throttle openings, clutch clearances and friction coefficients are discussed. The results show that, the self-reinforcement ratio is tested as 9.6; at the same time, the shift quality is comparable to that of the conventional hydraulic actuated clutch in automatic transmissions in terms of the shift duration (about 1 s) and vehicle jerk (\10 m/s 3). Taking advantage of fast response of the actuation DC motor, the wedge-based actuator is robust dealing with uncertain clutch clearance and friction coefficient. Therefore, the wedge-based clutch actuator has potential to provide acceptable performance for clutch-to-clutch shift.

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