KNOCK CHARACTERISTICS ANALYSIS OF A SUPERCHARGED SPARK  IGNITION ENGINE USING THREE GRADES OF FUELS

DC Uguru-Okorie; AA Dare; AA Burluka

doi:10.4314/njt.362.1301

KNOCK CHARACTERISTICS ANALYSIS OF A SUPERCHARGED SPARK IGNITION ENGINE USING THREE GRADES OF FUELS

Authors

DC Uguru-Okorie DEPARTMENT OF MECHANICAL ENGINEERING, LANDMARK UNIVERSITY, OMU-ARAN, KWARA STATE, NIGERIA
AA Dare DEPARTMENT OF MECHANICAL ENGINEERING, UNIVERSITY OF IBADAN, IBADAN, OYO STATE, NIGERIA
AA Burluka DEPT. OF MECHANICAL & CONSTRUCTION ENG’G, NORTHUMBRIA UNIV., NEWCASTLE-UPON-TYNE NE1 8ST, UK

DOI:

https://doi.org/10.4314/njt.362.1301

Keywords:

End gas, Fuel, FTiR, Knock, Spark Ignition Engine, Supercharging, Pressure.

Abstract

The power output of a spark ignition engine could be improved by boosting the intake pressure and compression ratio; however the applications of these are limited by knock in engines. This study examined the knocking behaviours of three commercially available fuels for spark ignition engines operated at engine intake pressures of 1.6 and 2.0 bar. The pressure data for the fuels tested were grouped into three: the fast cycle, medium cycle and slow cycles. Knock intensities from the pressure data were processed with Fast Fourier Transform (FFT) and band pass filtering techniques. The results showed that the knocking cycles occurred only in the fast and medium cycles. These results supported the view that auto-ignition of end-gases was due to compression from the high speed propagating flames. FTiR spectrums showed that the presence of aromatics was responsible for the better anti-knock quality exhibited by E5 and ULG 98 over PRF 95.

http://dx.doi.org/10.4314/njt.v36i2.25

Downloads

Published

2017-03-31

Issue

Vol. 36 No. 2 (2017)

Section

Chemical, Industrial, Materials, Mechanical, Metallurgical, Petroleum & Production Engineering

License

The contents of the articles are the sole opinion of the author(s) and not of NIJOTECH.

NIJOTECH allows open access for distribution of the published articles in any media so long as whole (not part) of articles are distributed.

A copyright and statement of originality documents will need to be filled out clearly and signed prior to publication of an accepted article. The Copyright form can be downloaded from http://nijotech.com/downloads/COPYRIGHT%20FORM.pdf while the Statement of Originality is in http://nijotech.com/downloads/Statement%20of%20Originality.pdf

For articles that were developed from funded research, a clear acknowledgement of such support should be mentioned in the article with relevant references. Authors are expected to provide complete information on the sponsorship and intellectual property rights of the article together with all exceptions.

It is forbidden to publish the same research report in more than one journal.

How to Cite

KNOCK CHARACTERISTICS ANALYSIS OF A SUPERCHARGED SPARK IGNITION ENGINE USING THREE GRADES OF FUELS. (2017). Nigerian Journal of Technology, 36(2), 505-514. https://doi.org/10.4314/njt.362.1301