Shudder and Frictional Characteristics Evaluation of Dual Clutch Transmission Fluids Ford Motor Company

Format:

Conference/Event

Author/Creator:

Ohtani, Ohtani, author.

Contributor:

King, Tracey E.

Knaffel, Martin

Mordukhovich, Gregory

Neumann, Robert

Small, Gordon P.

Steigerwald, Edgar

Zreik, Khaled

Conference Name:

SAE 2014 World Congress & Exhibition (2014-04-08 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2014

Summary:

Under the initiative of The United States Council for Automotive Research LLC (USCAR) [1], we have developed and run comprehensive friction tests of dual clutch transmission fluids (DCTFs). The focus of this study is to quantify the anti-shudder durability over a simulated oil life of 75,000 shifts. We have evaluated six DCT fluids, including 2 fluids with known field shudder performance.Six different tests were conducted using a DC motor-driven friction test machine (GK test bench): 1. Force Controlled Continuous Slip, 2. Dynamic Friction, 3. Speed controlled Acceleration-Deceleration, 4. Motor-torque controlled Acceleration-Deceleration, 5. Static Friction, and 6. Static Break-Away. The test fluids were aged (with the clutch system) on the test bench to create a realistic aging of the entire friction system simultaneously.The Force Controlled Continuous Slip mode has demonstrated a correlation with anti-shudder performance in the field, whereas other tests revealed important properties such as torque capacity and shift qualities. The study has provided an important data in order to establish anti-shudder test methods and specifications for DCT fluids.This project was undertaken and financially supported by the Transmission Working Group of USCAR

Notes:

Vendor supplied data

Publisher Number:

2014-01-1988

Access Restriction:

Restricted for use by site license