2Department of Mechanical Engineering, Faculty of Engineering and Technology, Annamalai University, Annamalai Nagar, 608002, India
3Department of Mechanical Engineering, Faculty of Engineering and Technology, Annamalai University, Annamalai Nagar, 608002, India
Abstract
The performance and emission characteristics of a four-hole passive pre-chamber combustion (PCC) in a gasoline direct injection (GDI) engine are designed, optimized, and validated in this work. The influence of important parameters such as PCC orifice throat angle, injection pressure,
and L/D ratio on engine performance is optimized using the Box-Behnken design in response surface methodology (RSM). By the utilization of RSM and CFD simulations, evaluation of performance in a GDI engine, which consists of 13 models, is done. Modelled and optimized responses are pressure, temperature, heat release rate, CO, CO₂, and NOx. CFD simulations were validated against the optimal configuration, which concludes parameters of a PCC orifice inclination of 70 degrees, an injection pressure of 65.12 bar, and an L/D ratio of 2. The findings show significant improvements in the engine performance parameters and emission reduction, NOx is reduced because of the optimal pre chamber utilization up to 23% while compare to engine without Pre chamber leading us to better insights into designing efficient and environmentally
friendly combustion systems.
