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Research Papers

Experimental Study and Analysis of Lubricants Dispersed With Nanodiamond Particles on Diesel Engine

[+] Author and Article Information
Hao Liu

School of Energy and Power Engineering,
Dalian University of Technology,
Dalian 116024, China
e-mail: liuyuhao@mail.dlut.edu.cn

Minli Bai

School of Energy and Power Engineering,
Dalian University of Technology,
Dalian 116024, China
e-mail: baiminli@dlut.edu.cn

Jizu Lv

School of Energy and Power Engineering,
Dalian University of Technology,
Dalian 116024, China
e-mail: lvjizu@dlut.edu.cn

Liang Zhang, Peng Wang, Chengzhi Hu

School of Energy and Power Engineering,
Dalian University of Technology,
Dalian 116024, China

1Corresponding author.

Manuscript received July 17, 2014; final manuscript received October 1, 2014; published online October 17, 2014. Assoc. Editor: Roger Narayan.

J. Nanotechnol. Eng. Med 5(4), 041001 (Oct 17, 2014) (7 pages) Paper No: NANO-14-1047; doi: 10.1115/1.4028733 History: Received July 17, 2014

Limitations in energy crisis and environment protection promote the development of engine lubricants. By friction machine and AVL diesel engine bench, the present investigation studies the tribological properties and dynamic performance of diesel engine with lubricants of commercial quality dispersed with different mass concentrations of nanodiamond particles. Reverse dragging process tests and mapping characteristics tests were brought in the bench test. Additionally, investigations were conducted using viscometer, thermal conductivity meter, scanning electron microscopy (SEM), and transmission electron microscope (TEM) to interpret the possible influence mechanisms of tribology and thermal conduction with nanodiamond particles. The friction machine experimental results show that lubricants dispersed with nanodiamond particles exhibit good friction-reduction and antiwear properties. The engine bench tests indicate that it has a desirable effect on engine performance, decreasing the mechanical loss while increasing fuel economy.

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Figures

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Fig. 1

TEM image of nanodiamond particles used as additive for base oil

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Fig. 2

The sedimentation of nanodiamond particles in lubricate oil over time

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Fig. 3

Viscosity-temperature curves of nanodiamond lubricants

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Fig. 4

Wear scar of the steel balls using different lubricants

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Fig. 5

Friction coefficients of the nanodiamond lubricants and the base oil

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Fig. 6

SEM images of test ball's surface using diamond lubricant (0.1%) compared to base oil

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Fig. 7

Thermal conductivities of base oil and nanodiamond lubricants

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Fig. 8

AVL diesel engine bench test system

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Fig. 9

Torque and power variations of diesel engine during the reverse dragging process compared with the base oil

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Fig. 10

The mapping characteristics curves of the diesel engine

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