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Research Papers: Fuel Combustion

Diesel Engine Optimization for Electric Hybrid Vehicles

[+] Author and Article Information
Talal F. Yusaf

FOES, University of Southern Queensland, Toowoomba 4350 QLD, Australiayusaft@usq.edu.au

J. Energy Resour. Technol 131(1), 012203 (Feb 06, 2009) (4 pages) doi:10.1115/1.3068347 History: Received February 11, 2008; Revised June 28, 2008; Published February 06, 2009

Performance and emission testing for a single cylinder four-stroke diesel engine have been experimentally performed to determine the optimum operation conditions for this engine when it is used as a hybrid power unit. The studied operation parameters included brake specific fuel consumption (BSFC), exhaust emission (NOx, CO, CO2, and O2), and engine life. The results indicate that the lowest BSFC of the engine was found when the engine runs around 1 kW charging load at speed ranged between 1900 rpm and 2700 rpm. As the speed of the engine is maintained constant, the minimum level of BSFC is below 300g/kWh at around 1900 rpm. The best engine operation conditions, for low emission, are found at engine speed around 2500 rpm. It was found that the oxides of nitrogen remain within the acceptable level (below 180 ppm) for such a diesel engine. The battery charge has been conducted at constant speeds, where the lubricant oil temperature was constant and always below maximum temperature; this is a good indication for longer engine life.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

A sketch of the experimental rig

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Figure 2

Exhaust temperature versus engine speed under no-load conditions

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Figure 3

Lubricant oil temperature versus engine speed under no-load conditions

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Figure 4

Brake specific fuel consumption for charging loads of 1 kW and 2 kW

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Figure 5

Lubricant oil temperature versus engine speed under 1 kW and 2 kW

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Figure 6

Brake specific fuel consumption versus charging load at various engine speeds

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Figure 7

Carbon dioxide emission as a function of charging load at different engine speeds

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Figure 8

Carbon monoxide emission as a function of charging load at different engine speeds

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Figure 9

The relationship between the NOx and charging load

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Figure 10

The relationship between the oxygen and charging load

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