Experimental test of a new compressed natural gas direct injection engine

Masjuki H. Hassan, M. Abul Kalam, T. M.Indra Mahlia, Ishak Aris, M. Khair Nizam, Shahrir Abdullah, Yusoff Ali

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

This paper presents experimental test results of a new compressed natural gas direct injection (CNGDI) engine that has been developed by modifying a multicylinder gasoline port injection engine. The major modifications done are (1) a modification of the injection system to gas direct injection using new highpressure gas injectors, (2) a change of the compression ratio from 10 to 14 through modification of piston and cylinder head, (3) and new long edge spark plugs. The CNG pressure at the common rail is kept constant at 20 bar. The engine has been operated at wide open throttle (WOT) condition to compare all the results with the original base engine. Hence, two engines are tested in this investigation. The test was conducted on a computer-controlled dynamometer to measure brake power; specific fuel consumption; volumetric efficiency; and exhaust emissions such as carbon monoxide (CO), oxides of nitrogen (NO x), and unburned hydrocarbon (HC). The objective of this investigation is to compare the test results between a CNGDI engine and a gasoline engine. It was found that the CNGDI engine produces a 4%higher brake power at 6000 rpm as compared to the original gasoline-fueled engine. The average brake specific fuel consumption (BSFC) of the CNGDI engine was slightly lower (about 0.28%) than the base engine. The CNGDI engine reduces 50% NO x emission as compared to base engine. However, the CNGDI engine produces higher HC and CO emissions as compared to the base engine by 34 and 48%, respectively. The results of this experiment will be used to further improve the CNGDI engine as well as to develop a new CNGDI car. The detailed results including fuel mapping are presented with discussions. copyright

Original languageEnglish
Pages (from-to)4981-4987
Number of pages7
JournalEnergy and Fuels
Volume23
Issue number10
DOIs
Publication statusPublished - 15 Oct 2009

Fingerprint

Compressed natural gas
Direct injection
Engines
Brakes
Gasoline
Carbon Monoxide
Hydrocarbons
Fuel consumption
Carbon monoxide
Gases
Nitrogen Oxides
Spark plugs
Cylinder heads
Dynamometers

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Hassan, M. H., Kalam, M. A., Mahlia, T. M. I., Aris, I., Nizam, M. K., Abdullah, S., & Ali, Y. (2009). Experimental test of a new compressed natural gas direct injection engine. Energy and Fuels, 23(10), 4981-4987. https://doi.org/10.1021/ef8011382
Hassan, Masjuki H. ; Kalam, M. Abul ; Mahlia, T. M.Indra ; Aris, Ishak ; Nizam, M. Khair ; Abdullah, Shahrir ; Ali, Yusoff. / Experimental test of a new compressed natural gas direct injection engine. In: Energy and Fuels. 2009 ; Vol. 23, No. 10. pp. 4981-4987.
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Hassan, MH, Kalam, MA, Mahlia, TMI, Aris, I, Nizam, MK, Abdullah, S & Ali, Y 2009, 'Experimental test of a new compressed natural gas direct injection engine', Energy and Fuels, vol. 23, no. 10, pp. 4981-4987. https://doi.org/10.1021/ef8011382

Experimental test of a new compressed natural gas direct injection engine. / Hassan, Masjuki H.; Kalam, M. Abul; Mahlia, T. M.Indra; Aris, Ishak; Nizam, M. Khair; Abdullah, Shahrir; Ali, Yusoff.

In: Energy and Fuels, Vol. 23, No. 10, 15.10.2009, p. 4981-4987.

Research output: Contribution to journalArticle

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Hassan MH, Kalam MA, Mahlia TMI, Aris I, Nizam MK, Abdullah S et al. Experimental test of a new compressed natural gas direct injection engine. Energy and Fuels. 2009 Oct 15;23(10):4981-4987. https://doi.org/10.1021/ef8011382