WIT Press


Combustion Monitoring System On A Natural Gas Fuelled Spark Ignition Engine With High Compression Ratio Using Ionization Current Sensors

Price

Free (open access)

Paper DOI

10.2495/ESUS150181

Volume

195

Pages

10

Page Range

209 - 218

Published

2015

Size

392 kb

Author(s)

D. Molina, F. Restrepo, I. Bedoya

Abstract

The control of combustion development on spark ignition engines is one of the most important international topics under research today. Engines with high compression ratios have higher thermal efficiency than their similars with low compression ratios but have bigger restrictions on cycle-to-cycle variations and knocking. The monitoring of combustion process is a tool that allows for operating these engines with safer conditions and improving their availability through time. This paper shows the implementation of a combustion monitoring system on a natural gas fuelled spark ignition engine with high compression ratio using ionization current sensors. The implemented methodology consisted of measuring chemical and thermal current ionization from natural gas combustion using the ignition spark plug. The experiments were performed at several power outputs and spark advances. The results obtained from the ionization current system was compared with combustion analysis achieved from in-cylinder pressure measurement with piezo-electric sensor (traditional measurement system). This methodology shows results consistent with those reported in the state of the art and it shown to be a reliable tool for the combustion monitoring on these kinds of engines.

Keywords

combustion engines, ionization current, high compression ratios, in-cylinder pressure, natural gas