Date of Award

2022

Publication Type

Thesis

Degree Name

M.A.Sc.

Department

Mechanical, Automotive, and Materials Engineering

Keywords

Electrode diameters, Spark ignition, Exhaust emission regulations

Rights

info:eu-repo/semantics/openAccess

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

The ever-growing demands to meet the exhaust emission regulations and fuel economy requirements have driven the development of modern spark ignition (SI) engines towards lean/diluted combustion strategies and engine downsizing. Currently, the transistor coil ignition (TCI) system is still the dominant ignition system applied in SI engines. This work investigates the effects of electrode diameters on the spark discharge characteristics.

In this study, different electrode diameters (0.2 mm, 0.7 mm, 1.5 mm, and 3.5mm) are used. The electrical waveforms of the discharge process are recorded, including the breakdown voltage, the glow voltage, and the secondary current. Results show that the breakdown voltage increases with the increase of electrode diameters (including high-voltage (HV) and ground electrodes). Besides, the glow voltage decreases with the electrode diameters increase.

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