Improvement in Shift Quality in a Multi Speed Gearbox of an Electric Vehicle through Synchronizer Location Optimization

2017-01-1596

03/28/2017

Features
Event
WCX™ 17: SAE World Congress Experience
Authors Abstract
Content
Electrical and Series Hybrid Vehicles are generally provided with single speed reduction gearbox. To improve performance and drive range, a two-speed gearbox with coordinated control of traction motor and gearshift actuator is proposed. For a two-speed gearbox, gearshift without clutch would increase the shifting effort. Active Synchronization is introduced for a smoother gearshift even without clutch. The quality of gearshift is considered as a function of applied shift force and time taken. To enhance the quality of the gearshift further, the location of the synchronizer in the transmission system is optimized. To validate the improvement in the quality of the gearshift, a mathematical model of the two-speed gearbox incorporating proposed location of synchronizer assembly along with active synchronization is developed. The qualitative and quantitative analysis of the results achieved is presented.
Meta TagsDetails
DOI
https://doi.org/10.4271/2017-01-1596
Pages
8
Citation
Penta, A., Gaidhani, R., Sathiaseelan, S., and Warule, P., "Improvement in Shift Quality in a Multi Speed Gearbox of an Electric Vehicle through Synchronizer Location Optimization," SAE Technical Paper 2017-01-1596, 2017, https://doi.org/10.4271/2017-01-1596.
Additional Details
Publisher
Published
Mar 28, 2017
Product Code
2017-01-1596
Content Type
Technical Paper
Language
English