Analytical Study of a Dog Clutch in Automatic Transmission Application

A dog clutch, if successfully implemented in an automatic transmission, provides better packaging and the potential for improved fuel economy. The technical requirements for this concept are examined through modeling and simulation. As a first step, a physics-based component level model is developed that provides an understanding of the basic contact and impact dynamics. The model is compared to a built-in AMESim block to establish confidence. This component level model is then integrated into a powertrain system model within the AMESim environment. As a test bed, the powertrain model is exercised to simulate a friction plate to dog clutch shift in a 6-speed automatic transmission. The analysis helps to define the slip speed target at the onset of the dog clutch engagement while ensuring shift requirements are met. Finally, the model is validated by comparing the simulated results with measured dynamometer data.

• Record URL:
  https://doi.org/10.4271/2014-01-1775
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/19463995
• Supplemental Notes:
  • Abstract reprinted with permission of SAE International.
• Authors:
  • Duan, Chengwu
• Conference:
  • SAE 2014 World Congress & Exhibition
  • Location: Detroit Michigan, United States
  • Date: 2014-4-8 to 2014-4-10
• Publication Date: 2014-4-1

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 1155-1162
• Serial:
  • SAE International Journal of Passenger Cars - Mechanical Systems
  • Volume: 7
  • Issue Number: 3
  • Publisher: SAE International
  • ISSN: 1946-3995
  • EISSN: 1946-4002
  • Serial URL: https://www.sae.org/publications/collections/content/E-JOURNAL-06/

Subject/Index Terms

• TRT Terms: Automatic transmissions; Clutches; Dynamometers; Fuel consumption; Gear shifting; Mathematical models; Power trains
• Subject Areas: Highways; Passenger Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 01649042
• Record Type: Publication
• Source Agency: SAE International
• Report/Paper Numbers: 2014-01-1775
• Files: TRIS, SAE
• Created Date: Oct 23 2017 1:41PM