A Study of Particulate Formation on the Combustion Chamber Wall

In the small high speed DI diesel engines, wall quenching plays an important role on the particulate formation process.

In order to clarify the particulate formation process, authors have analyzed the deposit on the combustion chamber wall, which are the results of the wall quenching. Deposit is sampled at 22 locations on the combustion chamber wall.

On the wall of the piston cavity, dry and SOF deposits generate. The deposit quantity is the highest on the side surface of the cavity, but SOF ratio is the smallest in the cavity.