Fuel Efficiency Improvement in Automatic Transmissions by Lockup Slip Methodology

2019-28-0029

10/11/2019

Event
International Conference on Advances in Design, Materials, Manufacturing and Surface Engineering for Mobility
Authors Abstract
Content
Increasing of automatic transmissions in passenger cars is based on pleasure of driving, smooth acceleration and easy operation makes the customer satisfaction. Challenges beyond 2020 is BS VI emission norms in India - a very tough goals on CO2& NOx reduction in Gasoline & Diesel vehicles. But its setback in lower fuel economy.
To support & enhance fuel economy in Automatic transmissions as part of drivetrain technologies, this article discusses about the power losses in torque converters and experiments on the actual Automatic transmission (AT) vehicle on-road to understand the real city driving behavior in the aspects of gear utilization & gas pedal utilization throughout the entire traffic conditions. With that data research, slip area and slipping conditions is determined & clutch slip control is enabled at area in torque converter by ensuring that NVH parameters are not affected.
The addition of the Lock-up Slip system add value in terms of “Joy of Driving” by providing a 2-3% improvement in fuel economy over the previous one.
Meta TagsDetails
DOI
https://doi.org/10.4271/2019-28-0029
Pages
6
Citation
Sukumar, A., "Fuel Efficiency Improvement in Automatic Transmissions by Lockup Slip Methodology," SAE Technical Paper 2019-28-0029, 2019, https://doi.org/10.4271/2019-28-0029.
Additional Details
Publisher
Published
Oct 11, 2019
Product Code
2019-28-0029
Content Type
Technical Paper
Language
English