Design and Performance of Low-Viscosity ATF

Kurihara, Isao; Kurosawa, Osamu

doi:10.4271/2007-01-3974

Cited by 8 publications

(1 citation statement)

References 7 publications

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“…There are two major approaches; to minimize the efficiency loss at the current system or to apply a new fuel-efficient control. For the former one, low viscosity lubricants are effective for reducing the churning losses caused by the lubricants inside the transmissions [1], and there are various commercial products which applied this concept. However, further viscosity reduction appears to be difficult because the lowering viscosity leads to a thinner oil film formation on the substrate, which possibly has a negative influence on anti-wear or anti-fatigue performance.…”

Section: Introductionmentioning

confidence: 99%

Advanced Control of Frictional Properties on Paper Clutch Materials by a Combination of Friction Modifiers

2017

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This study proposes a novel approach for controlling frictional performances at paper clutch systems by a combination of organic friction modifiers (OFMs). The OFMs are commonly used for modifying the frictional properties at the paper clutch. Although the effect of the OFMs tends to be dependent on temperature due to their working mechanism based on the surface adsorption, the frictional properties are preferable to be stable in all the operating temperature for the consistent and precise clutch control. Aiming to modify the temperature dependence of the OFM effect, an OFM with an Advanced Concept (FMAC) was newly developed, and the impact on the clutch frictional performance was investigated using Low Velocity Friction Apparatus (LVFA). Only with the conventional OFM, the friction values experienced excessive reduction at 80 or 120°C, while an optimal property was achieved at 40°C. In the presence of the FMAC, it was possible to inhibit the conventional OFM selectively at the high temperature conditions preventing the friction reduction, leading to the ideal frictional property in all the temperature conditions. The surface analysis revealed that the FMACs were capable of adsorbing on the substrate more intensively at high temperature, which should be the reason of the temperature dependent competitive effect of the FMACs.

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Section: Introductionmentioning

confidence: 99%

Advanced Control of Frictional Properties on Paper Clutch Materials by a Combination of Friction Modifiers

2017

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Automatic Transmission Lubricants

Vickerman¹,

Tipton²

2012

Automotive Lubricants and Testing

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This chapter will cover the functions, properties, and composition of automatic transmission fluids (ATFs), along with a brief description and history of original equipment manufacturer (OEM) ATF specifications for passenger cars. The cited works include an eclectic mixture of materials designed to give the reader interested in further study some historic and some more modern information, along with information from different points of view when possible. By no means is this meant to be a comprehensive review; it is only meant to be a small window into the world of transmission lubricant technology.

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