Numerical investigation of lambda-value prechamber ignition in heavy duty natural gas engine
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Institute of Combustion Engines and Powertrains, Poznan University of Technology, Poland
Ireneusz PIELECHA   

Institute of Combustion Engines and Powertrains, Poznan University of Technology, Piotrowo 3, 60-965, Poznań, Poland
Publication date: 2020-07-02
Submission date: 2020-05-01
Final revision date: 2020-05-23
Acceptance date: 2020-05-23
Combustion Engines 2020,181(2), 31–39
Turbulent Jet Ignition systems are mainly dedicated to the combustion of lean mixtures of natural gas in heavy duty engines. The use of such a system in combination with lean mixtures leads to an increase in its overall efficiency. The article presents simulation analyzes of the impact of the excess air coefficient occurring in prechamber on the combustion process: combustion indicators and emission indicators. Tests on a single-cylinder engine with a displacement of about 4 dm3 at medium mixture (IMEP = 1.0 MPa) were carried out using the AVL Fire software. It was found that the incineration of global lean mixtures (lambda = 2) is effective when initiating this process (in the prechamber) with a charge of a stoichiometric composition. A strong relationship was found between the thermodynamic indicators in both prechamber and main chamber and the excess air coefficient initiating combustion.
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