In order to reduce NOx emission and increase the brake thermal efficiency of a stationary diesel engine, a new prechamber, which is placed at the center of a cylinder head with a smaller volume, and a stratified fuel-water injection system were installed in a single cylinder diesel engine with 170mm bore and 180mm stroke, and it was tested to investigate its potential. As a result, the stratified fuel-water injection system reduced NOx and smoke emissions with a smaller reduction in brake thermal efficiency. A NOx concentration of 88ppm (excess O2 13%) at the brake thermal efficiency of 39% was obtained using this new prechamber combustion system in combination with the stratified fuel-water injection system.
