Effect of iridium spark plug gap on emission, noise, vibration of an internal combustion engine

Abstract

The most important factors affecting comfort and performance in motor vehicles are; The exhaust gases generated by the internal combustion engine are noise and vibration. The effect of these factors can be reduced thanks to the fully efficient and regular operation of the engine. The most important part affecting the efficient operation of the spark plug ignition engine is the spark plug. Spark plug failure; emission, noise and vibration values increase. These negative effects reduce vehicle comfort and increase travel costs; it also causes more damage to nature. Vehicles are designed and manufactured to ensure optimum operating parameters during production. However, changes in these parameters occur as the vehicle is used and different types of parts are used during maintenance. In this study, spark plug nail spacing; Emission, noise and vibration effects and determination of optimum nail spacing. In the experiments, iridium spark plug was used as ignition spark type. The spark plugs wear out because the engine fires continuously during operation. This wear increases the distance between the center electrode and the electrode cap and changes the resulting spark quality. According to the experiments; When the iridium spark plug nail spacing is 0.8 mm, the noise is optimum at different revolutions, the vibrations in the 0.9 mm nail spacing increase at low revolutions, and the hydrocarbon value is minimized at high revolutions in the 0.8 mm spark plug nail spacing.