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General Motors Front Wheel Drive Seven Speed Dry Dual Clutch Automatic Transmission

Journal Article
2015-01-1093
ISSN: 1946-3936, e-ISSN: 1946-3944
Published April 14, 2015 by SAE International in United States
General Motors Front Wheel Drive Seven Speed Dry Dual Clutch Automatic Transmission
Sector:
Citation: Clark, K., Singh, T., Buffa, R., Gayney, J. et al., "General Motors Front Wheel Drive Seven Speed Dry Dual Clutch Automatic Transmission," SAE Int. J. Engines 8(3):1379-1390, 2015, https://doi.org/10.4271/2015-01-1093.
Language: English

Abstract:

General Motors has introduced a new front wheel drive seven speed dry dual clutch automatic transmission in 2014. The 250 Nm input torque rated gear box was designed and engineered for a global market in both front wheel drive and all-wheel drive configurations. The transmission has integrated start/stop capability enabled by the use of an electric motor driven pump and a pressurized accumulator.
The architecture selected was chosen for optimization of packaging, fuel economy, mass, shift pleasability, and NVH. High mileage durability and world class drivability were the cornerstone deliverables during the engineering and design process
Fuel efficiency is estimated to be 3% - 10% improvement over a conventional six speed automatic transmission. FWD variant wet mass of 78.1 kg was achieved through the rigorous engineering processes used to optimize the transmission system.