The Effect of Combustion Chamber Geometry and Injection Timing on Diesel Emission

To improve the soot emissions performance of a common rail diesel engine, two combustion chambers with different diameter-depth ratio were designed under the conditions of the same compression ratio, and using CFD software to simulate the combustion process with different chamber shape and injection timing. The results showed that NOx emissions decreased with the delay of the injection timing, while soot emissions increased. In the different combustion chambers, chamber B had lower soot emissions.