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Research Papers: Internal Combustion Engines

Experimental Investigation of the Effect of Biodiesel Utilization on Lubricating Oil Degradation and Wear of a Transportation CIDI Engine

[+] Author and Article Information
Shailendra Sinha

Department of Mechanical Engineering, Engine Research Laboratory, Indian Institute of Technology Kanpur, Kanpur 208016, India

Avinash Kumar Agarwal

Department of Mechanical Engineering, Engine Research Laboratory, Indian Institute of Technology Kanpur, Kanpur 208016, Indiaakag@iitk.ac.in

J. Eng. Gas Turbines Power 132(4), 042801 (Jan 12, 2010) (9 pages) doi:10.1115/1.3077659 History: Received June 10, 2007; Revised October 20, 2008; Published January 12, 2010; Online January 12, 2010

In the present experimental research work, rice-bran oil methyl ester (ROME) is derived through transesterification of rice-bran oil using methanol in the presence of sodium hydroxide catalyst. On the basis of previous research for performance, emission, and combustion characteristics, a 20% (v/v) blend of ROME (B20) was selected as optimum biodiesel blend. This experimental investigation was aimed to investigate the effect of biodiesel on wear of in-cylinder engine components. Endurance tests were conducted on a medium duty direct injection transportation diesel engine with B20. Tests were conducted under predetermined loading cycles in two phases: engine operating on mineral diesel (B00) and engine fueled with B20. After completion of these tests, engines were dismantled for observing the physical condition of various vital engine parts, e.g., piston rings, bearings, cylinder liner, and cylinder head. Physical measurements of these vital parts were also carried out to assess the wear of these parts. The physical wear of various parts except big end bearings (connecting rod bearing bore) were found to be lower in the case of B20 fueled engine. Wear metals in the lubricating oil samples drawn from the engines at regular intervals were investigated. Relatively lower wear concentrations of all wear metals except lead were found in the lubricating oil of B20 fueled engine. To quantify the wear of cylinder liners, surface parameters at different locations in the liner (top dead center, bottom dead center, and midstroke) were measured and compared. A qualitative analysis was also carried out by conducting surface profiles and scanning electron microscopy at the same locations.

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Figures

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Figure 1

Schematic of experimental setup

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Figure 2

Carbon deposits on vital engine parts

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Figure 3

Percent weight loss of piston rings after 100 h of engine operation

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Figure 4

Concentration of wear metals in lubricating oil

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Figure 5

Surface profiles and SEM of fresh liner surfaces

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Figure 6

Surface profiles of liner surface of mineral diesel and biodiesel fueled engine

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Figure 7

SEMs of liner surfaces of mineral diesel and biodiesel fueled engine

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