Numerical simulation of carbon monoxide emissions from spark ignition engines

José Ricardo Sodré, Marco Valério Kuhlmann Raggi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


This work describes a numerical model for calculation of carbon monoxide (CO) emissions from spark ignition engines. The model calculates CO concentration from a kinetic mechanism and from the equilibrium combustion equation. A computer program that simulates the cycle of spark ignition engines performs the CO model calculations. The model was validated against experimental data from a single-cylinder research engine and from a production multi-cylinder engine. The varied parameters were air/fuel ratio, load and engine speed. From comparison with calculated equilibrium concentration, it is shown that CO should be modeled by chemical kinetics for better agreement with measured exhaust values.

Original languageEnglish
Pages (from-to)37-43
Number of pages7
JournalJournal of the Brazilian Society of Mechanical Sciences and Engineering
Issue number1
Early online date5 Sept 2013
Publication statusPublished - 14 Jan 2014


  • Carbon monoxide
  • Chemical kinetics
  • Emissions
  • Modeling
  • Spark ignition engine


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