Resonance shear measurement on lubrication properties of engine oils: Effects of additives

Shogo Shibazaki, Masashi Mizukami, Sae Yoshida, Takuya Yanagimachi, Tadao Tanabe, Kazue Kurihara

研究成果: Article

2 引用 (Scopus)

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We investigated properties of lubricants confined between mica surfaces using resonance shear measurement (RSM) which can monitor the rheological and tribological properties of the lubricants as a function of the surface separation distance (D) as well as the normal load (L). The formulations of the five lubricants investigated were; oil A (mineral oil + viscosity modifier (VM) + Antiwear additive + Metallic detergent + Ashless dispersant + Anti-oxidant + Foam inhibitor), oil B (oil A + Molybdenum dithiocarbamate (MoDTC)), oil-C (oil A + Glycerol monooleate (GMO), oil D (mineral oil + viscosity modifier (VM)), and oil E (mineral oil only). The oil E showed the friction coefficient (p) of 0.45 at the normal load (I) below 2.0 mN. The oil D, which contained VM, showed significant decrease in the n value to 0.19. In the case of oil A, B, C, the thickness of lubricant layers became significantly thicker than those of oil E and D, however, the no clear reduction in the jj value compared with oil D was observed. These results have demonstrated that the RSM can evaluate the contribution of the each component on the lubrication in order to optimize their properties and performance.

元の言語English
ページ(範囲)284-293
ページ数10
ジャーナルToraibarojisuto/Journal of Japanese Society of Tribologists
63
発行部数4
出版物ステータスPublished - 2018
外部発表Yes

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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