Investigation of Multipoint Spark Ignition Engine Using CFD Code

Abstract

The main aim of this research is to utilize the emerging combustion process technology in order to develop the combustion process inside spark internal combustion engine which is very important factor for engine performance and emissions, which will be achieved by better understanding of this process. For this purpose a simulation model will be developed. The proposal is an attempt to control the combustion process to occur near or as close as possible to TDC which will improve engine’s performance. This is to be achieved by a control of the multipoint combustion using multipoint spark in the combustion chamber and in co-ordination with control of engine speed (piston speed) to avoid knock; it is hoped that the use of a higher compression ratio may be possible. The multipoint ignition system is to be arranged between the cylinder head and the piston to cover most of the combustion chamber. The research concerned the influence of spark plugs number and location on the engine performance and emissions. CFD is also exploited to deal with some specific problems like turbulent flame speed model, flame-wall interactions and viscous model. The project also will present a modeling of the combustion process in this engine, which was performed with CFD code.