Wall-wetting due to liquid fuel film motion and fuel droplet impingement on combustion chamber walls is a major source of unbumed hydrocarbons (UBHC), and is a concern for oil dilution in PFI engines.

Multidimensional computations were carried out to simulate the in-cylinder fuel/air mixing process of a direct-injection spark-ignition engine using a modified version of the KTVA-3 code. A hollow ...