Browse Publications Technical Papers 2017-01-1596
2017-03-28

Improvement in Shift Quality in a Multi Speed Gearbox of an Electric Vehicle through Synchronizer Location Optimization 2017-01-1596

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.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Rolling Contact Fatigue Properties of Selected PM-Materials for Gear-Box Applications

1999-01-0333

View Details

TECHNICAL PAPER

Improvement of Powder Metallurgy Gears for Engines and Transmissions

2013-32-9102

View Details

TECHNICAL PAPER

Comparative Analysis of Multiple Powertrain Architectures based on a Novel Optimization Framework

2014-01-1105

View Details

X