Effect of Ignition Position on Pre-chamber Jet Combustion

Abstract

This study focused on the effect of ignition position in the pre-chamber on front chamber jet combustion. To investigate the effect of ignition position, we designed a pre-chamber visualized cylinder head with multiple ignition positions that can capture the pre-chamber combustion. From the visualized images, it was found that two different jet morphologies, a pre-existing jet and a pre-existing unburned mixed gas jet, are produced depending on the ignition position. In the case of the pre-existing jet, it was confirmed that the combustion pattern of the sub-chamber affects the main chamber flame spread velocity.