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Performance and emission characteristics of direct injection C.I engine retrofitted with mono-CNG system

Osman, Shahrul Azmir and Alimin, Ahmad Jais and Ismail, Mohd Yusri and Koh, Wern Hui (2013) Performance and emission characteristics of direct injection C.I engine retrofitted with mono-CNG system. In: Asia Conference on Mechanical and Materials Engineering (ACMME 2013) , 8-9 October 2013, Wuhan, China .


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Diesel engines are widely used in logistics and haulage as vehicular prime movers. In the mechanized and fast-moving forward world of today, the consumption of petroleum products has become an important yardstick of a country's prosperity. This ever-increasing consumption has led the world to face the twin challenge of energy shortage and environmental deterioration. Natural gas has been one of the highly considered alternative fuels for both spark ignition (S.1) and compressed ignition (C.I.) engines. The advantages and benefits of CNG have made it the preferred choice as alternative fuel in the transportation sector. This present study focused on the effects of retrofitted direct injection C.I. engine with mono-CNG system to its performance and exhaust emissions. The engine speed was varied from 850 rpm to 2500 rpm, with load test conditions of ONm, 27.12Nm and 53.23Nm, using an engine dynamometer. Results indicated that CNG has the potential to provide better fuel consumption compared to diesel fuel. Meanwhile, the characteristics of exhaust gas emissions such as smoke opacity and C02 gave promising results compared to CO, HC and NOX, for diesel combustion.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: converted C.I. engine; compressed natural gas; retrofitted mono-gas system; CNG engine; engine performance and emissions
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ751-805 Miscellaneous motors and engines
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Plant and Automotive Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 18 Oct 2013 03:48
Last Modified: 21 Jan 2015 08:13
URI: http://eprints.uthm.edu.my/id/eprint/4401
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