Feasibility of a Clutchless Dual-Shaft Hybrid Transmission System for Performance Applications
Name
v003t01a035-detc2016-59955.pdf
Size
2.4 MB
Format
Adobe PDF
Checksum (MD5)
487060de4fd2b1c4b3ed886e04691ef7
Author(s)
Shah, Sahil Rajesh
Prost, Victor
Eubanks, Zachary
Reiter, Paige L.
Bondarchuk, Daria Alexandrovna
Hua, Yu
Dorsch, Daniel S.
Winter, Amos G.
Date Issued
August 2016
Journal
Volume 3: 18th International Conference on Advanced Vehicle Technologies; 13th International Conference on Design Education; 9th Frontiers in Biomedical Devices
Publisher
ASME International
Citation
Shah, Sahil, Victor Prost, Zachary Eubanks, Paige Reiter, Daria Bondarchuk, Yu Hua, Daniel S. Dorsch, and Amos G. Winter. “Feasibility of a Clutchless Dual-Shaft Hybrid Transmission System for Performance Applications.” Volume 3: 18th International Conference on Advanced Vehicle Technologies; 13th International Conference on Design Education; 9th Frontiers in Biomedical Devices (August 21, 2016).
Version
Final published version
Abstract
A novel hybrid-electric transmission concept was sought that yields higher acceleration and smoother gear-shifts compared to existing dual-clutch systems while improving the energy efficiency of the vehicle. After evaluating a range of strategies, the elimination of the clutch was identified as a viable method for reducing the vehicle's effective inertia and viscous losses. The proposed architecture implements a single electric motor, and two separate shafts for odd and even gears, to replace the functions of a clutch. High acceleration rates can be achieved using the electric motor when launching the vehicle. Furthermore, the torque from the electric motor (EM) and internal combustion engine (ICE) can be simultaneously delivered through the two shafts to sustain this high acceleration. A 0 to 100 km/hr time of 3.18 s was simulated for a 1600 kg vehicle using a 180 kW EM and 425 kW ICE. In addition, the EM can be used to match the speeds of consecutive gears on the two shafts to reduce jerk while shifting. Shift durations were found to vary between 0.2 and 0.9 s using this strategy. Other benefits include regenerative braking and the removal of the reverse gear since the EM can rotate in either direction. It was also found that the vehicle can be operated on only electric power in urban settings - represented by the NEDC driving cycle - if the battery is recharged through regenerative braking, and by the ICE the vehicle is stopped.
MIT Department
MIT-SUTD Collaboration
Massachusetts Institute of Technology. Department of Mathematics
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1115/DETC2016-59955
