Analysis of Ignition Spark Parameters Generated by Modern Ignition System in SI Engine Fueled by Ammonia

Mariusz Chwist (), Michał Gruca, Michał Pyrc () and Borys Borowik
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Mariusz Chwist: Department of Technology and Automation, Czestochowa University of Technology, 42-201 Czestochowa, Poland
Michał Gruca: Department of Thermal Machinery, Czestochowa University of Technology, 42-201 Czestochowa, Poland
Michał Pyrc: Department of Thermal Machinery, Czestochowa University of Technology, 42-201 Czestochowa, Poland
Borys Borowik: Department of Automatic Control, Electrical Engineering and Optoelectronics, Czestochowa University of Technology, 42-201 Czestochowa, Poland

Energies, 2025, vol. 18, issue 13, 1-16

Abstract: This paper analyzes the influence of the number of ignition coils and spark discharge energy on the Coefficient of Variation of Indicated Mean Effective Pressure (COV IMEP ) of an SI internal combustion piston engine. A modern electronically controlled induction ignition system is used during the test. Two fuels are used in the experiment. The reference fuel is gasoline and the tested fuel is ammonia. For the traditional fuel, using an additional ignition coil does not improve COV IMEP . This parameter for gasoline has an almost constant value for different ignition system charging times. The situation is different for ammonia. This fuel requires high ignition energy. The use of one ignition coil demands a long charging time. For short charging times, unrepeatability of the engine cycles is unacceptable. The use of an additional ignition coil allowed to the charging coil timing to be shortened and the unrepeatable engine cycles to be reduced. This paper determined the maximum charging time of the used ignition coil, above which the spark parameters are worse. In addition, the influence of charging time and number of ignition coils on total spark energy, spark discharge duration, maximum spark power, and voltage during spark discharge for ammonia is presented. The data presented in this paper are developed based on measurements of current and voltage in the secondary winding of the ignition coil. A self-developed electronic device enabling the change in spark energy is used to control the ignition system. This paper also presents the construction of modern ignition systems, describes the functions of selected components, and briefly discusses their diagnostics.

Keywords: ignition system; internal combustion piston engine; spark ignition; gasoline; ammonia; spark plug; spark discharge energy; COV IMEP (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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