Professional paper
NEW FRICTION DURABLE ADDITIVE TECHNOLOGY AND ITS APPLICATION IN AUTOMATIC TRANSMISSIONS
Samuel H. Tersigni
; R&D Laboratory, Afton Chemical
Lee D. Saathoff
; R&D Laboratory, Afton Chemical
Christopher Cleveland
; R&D Laboratory, Afton Chemical
Abstract
This paper reports the development of a new additive technology allowing formulation of mineral oil based Automatic Transmission Fluids (ATFs) with significantly improved friction durability. The paper compares friction performance of the new additive technology with commercially available European, Asian and North American style ATFs in industry standard friction tests such as the SAE No’2 rig and the Low Velocity Friction Apparatus. The paper also considers examples of the broader technical challenges posed by the latest ATF specifications in terms of more stringent oxidation, wear, extreme pressure, friction durability, torque capacity and anti-corrosion requirements, and compares the performance of the new friction durable ATF technology with other commercially available ATFs in some of these areas.
The fluid friction durability performance offered by this new additive technology is applicable in a variety of automatic transmission hardware, e.g. wet starting clutches, torque converter clutches, dual clutch transmissions and the latest generation six-, seven- and eight-speed step type automatic transmissions.
Keywords
ATF fluid Dexron VI specification; automatic transmission; additive for ATF fluids; anti-shudder performance; anti-wear properties
Hrčak ID:
55556
URI
Publication date:
30.6.2010.
Visits: 2.936 *