Journal Home > Volume 8 , Issue 2
Friction 2020, 8(2): 471-480 https://doi.org/10.1007/s40544-019-0296-0
Research Article | Open Access | Issue | Published: 09 September 2019

Effects of hydraulic oil and lubricant additives on dynamic friction properties under various reciprocating sliding conditions

Show Author's Information Shinji KATO1( ),  Shinya SASAKI2
Engineering Headquarters, Automotive Components, KYB Corporation, 2548, Dota, Kani-shi, Gifu 509-0298, Japan
Department of Mechanical Engineering, Faculty of Engineering Division I, Tokyo University of Science, 6-3-1, Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
Keywords:
additive, shock absorber, dynamic friction, reciprocating friction, zinc dithiophosphate (ZnDTP)
Cite this article:
KATO S, SASAKI S. Effects of hydraulic oil and lubricant additives on dynamic friction properties under various reciprocating sliding conditions. Friction, 2020, 8(2): 471-480. https://doi.org/10.1007/s40544-019-0296-0
Download citation
EndNote(RIS)
BibTeX

635

Views

43

Downloads

Citations

8

Crossref

N/A

WoS

6

Scopus

0

CSCD

Abstract Full text About this article

The friction characteristics of a shock absorber are very complex because the reciprocating motion is not always identical. In this study, a device was developed and used to analyze the dynamic friction characteristics under various reciprocating sliding conditions to determine the sliding materials and hydraulic oils that improve the shock absorber performance. This study describes the influence of hydraulic oil additive on the fine reciprocating friction characteristics of steel and copper alloy. Hydraulic oils were prepared by blending a paraffinic mineral oil with zinc dithiophosphate (ZnDTP) and polyhydric alcohol ester as additives. The results show that the dynamic frictional characteristics vary mainly depending on the additive concentration. A specific additive formulation induces a unique amplitude-dependent friction behavior. In addition, the influence of different additives on the lubrication mechanism is investigated based on the instrumental analysis of the friction surface.


menu
Abstract
Full text
Outline
About this article

Effects of hydraulic oil and lubricant additives on dynamic friction properties under various reciprocating sliding conditions

Show Author's information Shinji KATO1( ), Shinya SASAKI2
Engineering Headquarters, Automotive Components, KYB Corporation, 2548, Dota, Kani-shi, Gifu 509-0298, Japan
Department of Mechanical Engineering, Faculty of Engineering Division I, Tokyo University of Science, 6-3-1, Niijuku, Katsushika-ku, Tokyo 125-8585, Japan

Abstract

The friction characteristics of a shock absorber are very complex because the reciprocating motion is not always identical. In this study, a device was developed and used to analyze the dynamic friction characteristics under various reciprocating sliding conditions to determine the sliding materials and hydraulic oils that improve the shock absorber performance. This study describes the influence of hydraulic oil additive on the fine reciprocating friction characteristics of steel and copper alloy. Hydraulic oils were prepared by blending a paraffinic mineral oil with zinc dithiophosphate (ZnDTP) and polyhydric alcohol ester as additives. The results show that the dynamic frictional characteristics vary mainly depending on the additive concentration. A specific additive formulation induces a unique amplitude-dependent friction behavior. In addition, the influence of different additives on the lubrication mechanism is investigated based on the instrumental analysis of the friction surface.

Keywords: additive, shock absorber, dynamic friction, reciprocating friction, zinc dithiophosphate (ZnDTP)

References(17)

[1]
S Kato. Tribology of shock absorbers. (in Japanese). KYB Tech Rev 46: 8-12 (2013)
Google Scholar
[2]
J Lizarraga, J A Sala, J Biera. Modelling of friction phenomena in sliding conditions in suspension shock absorbers. Veh Syst Dyn 46(S1): 751-764 (2008)
DOI Google Scholar
[3]
J C Dixon. The Shock Absorber Handbook. 2nd ed. Chichester (England): John Wiley, 2007.
DOI
[4]
S Kato, S Sasaki. Study of evaluation index characterizing dynamic friction characteristics in shock absorber. J Jpn Soc Tribol 64(1): 55-62 (2019)
Google Scholar
[5]
H Spikes. Friction modifier additives. Tribol Lett 60(1): 5 (2015)
DOI Google Scholar
[6]
J H Chin, W C Fu. Analysis of an electrohydraulic servo system subject to stribeck-type friction. Int J Syst Sci 25(6): 1015-1037 (1994)
DOI Google Scholar
[7]
M Iwasaki, T Shibata, N Matsui. Disturbance observer-based nonlinear friction compensation and application to table drive system. IEEJ Trans Ind Appl 118(1): 51-57 (1998)
DOI Google Scholar
[8]
K Ito, J M Martin, C Minfray, K Kato. Formation mechanism of a low friction ZDDP tribofilm on iron oxide. Tribol Trans 50(2): 211-216 (2007)
DOI Google Scholar
[9]
H Oe, R Tsuboi, S Kato, S Sasaki. Tribo-film formation of lubricant additives on Cr-plated surface sliding against nitrile-butadiene rubber. Tribol Lett 51(2): 253-260 (2013)
DOI Google Scholar
[10]
T Yamaguchi, J Ando, T Tsuda, N Takahashi, M Tohyama, A Murase, T Ohmori, K Hokkirigawa. Sliding velocity dependency of the friction coefficient of Si-containing diamond-like carbon film under oil lubricated condition. Tribol Int 44(11): 1296-1303 (2011)
DOI Google Scholar
[11]
H B Ji, M A Nicholls, P R Norton, M Kasrai, T W Capehart, T A Perry, Y T Cheng. Zinc-dialkyl-dithiophosphate antiwear films: Dependence on contact pressure and sliding speed. Wear 258(5-6): 789-799 (2005)
DOI Google Scholar
[12]
A Simms, D Crolla. The Influence of Damper Properties on Vehicle Dynamic Behaviour. Detroit (USA): SAE, 2002.
DOI
[13]
Z L Tang, S H Li. A review of recent developments of friction modifiers for liquid lubricants (2007-present). Curr Opin Solid State Mater Sci 18(3): 119-139 (2014)
DOI Google Scholar
[14]
S Jahanmir, M Beltzer. An adsorption model for friction in boundary lubrication. A S L E Trans 29(3): 423-430 (1986)
DOI Google Scholar
[15]
H Spikes. The history and mechanisms of ZDDP. Tribol Lett 17(3): 469-489 (2004)
DOI Google Scholar
[16]
J M Martin, T Onodera, C Minfray, F Dassenoy, A Miyamoto. The origin of anti-wear chemistry of ZDDP. Faraday Discuss 156: 311-323 (2012)
DOI Google Scholar
[17]
D W Johnson, J E Hils. Phosphate esters, thiophosphate esters and metal thiophosphates as lubricant additives. Lubricants 1(4): 132-148 (2013)
DOI Google Scholar
Publication history
Copyright
Acknowledgements
Rights and permissions

Publication history

Received: 18 October 2018
Revised: 18 December 2018
Accepted: 15 April 2019
Published: 09 September 2019
Issue date: April 2020

Copyright

© The author(s) 2019

Acknowledgements

The authors would like to thank all their colleagues who gave them the opportunity to publish this paper. Besides, the contribution of Dr. Takuya Nakase is gratefully acknowledged, who performed SEM/EDS.

Rights and permissions

Open Access: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.

The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.

To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

Return