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TECHNICAL PAPERS: Internal Combustion Engines

Experimental Investigation of the Effect of Exhaust Gas Recirculation on Lubricating Oil Degradation and Wear of a Compression Ignition Engine

[+] Author and Article Information
Shrawan Kumar Singh, Mukesh Sharma

Environmental Engineering and Management Program, Indian Institute of Technology, Kanpur, Kanpur 208016, India

Avinash Kumar Agarwal, Dhananjay Kumar Srivastava

Department of Mechanical Engineering, Indian Institute of Technology, Kanpur, Kanpur 208016, India

J. Eng. Gas Turbines Power 128(4), 921-927 (Sep 26, 2005) (7 pages) doi:10.1115/1.2136368 History: Received January 14, 2005; Revised September 26, 2005

This experimental investigation was aimed to investigate the effect of exhaust gas recirculation (EGR) on wear of in-cylinder engine parts. EGR setup was prepared for a two-cylinder, air-cooled, constant-speed direct-injection compression-ignition engine. Test setup was run for 96hr under predetermined loading cycles in two phases; normally, operating condition (i.e., without EGR) and with a fixed EGR rate of 25%. Addition of metallic wear debris in the lubricating oil samples drawn after regular interval from both engine operating phases was investigated. Relatively higher concentrations of all wear metals were found in the lubricating oil of the EGR-operated engine, which indicates higher wear of various engine parts. Weight loss of piston rings used in both phases was compared to quantify the amount of wear of piston rings. To quantify the amount of cylinder wear surface roughness parameters of cylinder liners were measured at three positions (top dead center, mid-stroke, and bottom dead center) on thrust and anti-thrust side. A qualitative analysis was also carried out by taking surface profiles and Scanning Electron Micrographs at same locations.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic diagram of experimental setup

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Figure 2

Fe, Cu, and Cr concentration as a function of lubricating oil usage

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Figure 3

Ni, Al, and Mn concentration as a function of lubricating oil usage

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Figure 4

Pb, Mg, and Zn concentration as a function of lubricating oil usage

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Figure 5

Percent change in carbon content as function of lubricating oil usage

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Figure 6

Percent weight loss of piston rings after 96hr of engine run

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Figure 7

Surface profile of fresh liner (a) without EGR (b) with EGR

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Figure 8

Surface profiles of cylinder liner surfaces of engine operating with and without EGR after 96hr

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Figure 9

Representation of piston motion (22)

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Figure 10

SEM of cylinder liner surfaces of engine operating with/without EGR

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