Effect of Spark Advance on a Gas Run Automotive Spark Ignition Engine

Authors

  • Md Ehsan Department of Mechanical Engineering Bangladesh University of Engineering and Technology, Dhaka

DOI:

https://doi.org/10.3329/jce.v24i0.5584

Keywords:

spark ignition engine, spark advance

Abstract

Petrol engines can run on natural gas, with little modification. The combustion characteristics of natural
gas is different from that of petrol, which eventually affects the engine performance. The performance of a
typical automotive engine was studied running on natural gas, firstly at a constant speed for various loads
and then at a constant load for a range of speeds and results were compared with performance using petrol.
Variation of the spark advance, consisting of centrifugal and vacuum advance mechanisms, was
investigated. Results showed some reduction in power and slight fall of efficiency and higher exhaust
temperature, for natural gas. The air-fuel ratio for optimum performance was higher for gas than for petrol.
This variation in spark requirement is mainly due to the slower speed of flame propagation for natural gas.
For both the cases, the best power spark advance for natural gas was found to have higher values than
petrol. This issue needs to be addressed during retrofitting petrol engines for running on natural gas.


Journal of Chemical Engineering Vol.ChE 24 2006 42-49

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Published

2010-07-21

How to Cite

Ehsan, M. (2010). Effect of Spark Advance on a Gas Run Automotive Spark Ignition Engine. Journal of Chemical Engineering, 24, 42–49. https://doi.org/10.3329/jce.v24i0.5584

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Articles