Numerical Simulation of TBD620 Diesel Engine’s In-cylinder Working Process

The three-dimension substantiality of the TBD620 diesel engine's intake port and combustion chamber was constructed on the Pro/E software platform, and the simulation of the intake, compression and combustion process were done with the fluid analysis software FIRE. The effect of the double controllable intake swirl system on eddies in the cylinder, the mixing of oil and gas, the features of combustion and emissions of the TBD620 diesel engine were analyzed. The results have showed that the intake swirl of the double controllable intake swirl system can ameliorate the diesel engine's mixed gas significantly, the low load combustion and emissions performance of the diesel engine are also substantially increased.