Development of New Automatic Transmission Fluid for Fuel Economy 2003-01-3258
It is important to reduce the viscosity of automatic transmission fluid (ATF) in order to improve fuel economy. However, in general, low viscosity fluid can cause metal fatigue, wear, and seizure. It is necessary to increase the viscosity of the fluid at higher temperatures to maintain the durability of the automatic transmission (AT). The key point is the selection of the base oil and the viscosity index improver (VII) with both a high viscosity index (VI) and excellent shear stability. On the basis of this concept, a new generation high performance ATF named WS was developed. WS can achieve the highest level of fuel economy, while maintaining the durability of the AT.
Citation: Yamamori, K., Saitou, K., Kobiki, Y., and Ogawa, A., "Development of New Automatic Transmission Fluid for Fuel Economy," SAE Technical Paper 2003-01-3258, 2003, https://doi.org/10.4271/2003-01-3258. Download Citation
Author(s):
Kazuo Yamamori, Koji Saitou, Yasushi Kobiki, Akiyoshi Ogawa
Affiliated:
Toyota Motor Corp.
Pages: 9
Event:
SAE Powertrain & Fluid Systems Conference & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Lubricants, Rheology and Tribology, and Driveline Fluids-SP-1810
Related Topics:
Automatic transmissions
Transmission fluids
Fuel economy
Fatigue
Wear
Durability
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