Title :
Numerical Simulation on a New Solution to Cold-Start Emission for Gasoline Direct Injection Engine
Author_Institution :
State Key Lab. of Engines, Tianjin Univ., Tianjin, China
Abstract :
A new method to solve the cold-start emission problem for gasoline direct injection engine by combining the special shape of piston crown with the compound fuel supply system is studied. With the CFD numerical simulation, the influence of this method on the air flow and the air-fuel mixture formation in cylinder of Gasoline Direct Injection engine under the cold-start conditions is analyzed. The result indicates that, by using the special shape of piston crown to guide the air flow reasonably and combining with the compound fuel supply system, the new method can optimize the formation and distribution of air flow in cylinder under the cold-start conditions, promote the fuel mixing with air, improve the distribution of air-fuel ratio and then reduce the HC emissions.
Keywords :
air pollution; computational fluid dynamics; fuel systems; internal combustion engines; pistons; CFD numerical simulation; air flow; air-fuel mixture formation; air-fuel ratio; cold-start emission problem; compound fuel supply system; gasoline direct injection engine; piston crown; Automation; Computational fluid dynamics; Engine cylinders; Fuels; Internal combustion engines; Numerical simulation; Petroleum; Pistons; Shape; Valves; Compound Fuel Supply System; GDI Engine; Numerical Simulation; Piston Crown;
Conference_Titel :
Intelligent Computation Technology and Automation (ICICTA), 2010 International Conference on
Conference_Location :
Changsha
Print_ISBN :
978-1-4244-7279-6
Electronic_ISBN :
978-1-4244-7280-2
DOI :
10.1109/ICICTA.2010.668
