Multivariable simulation on a Homogeneous Charged Microwave Ignition system

Petrol Internal Combustion Engines (ICEs) use a spark ignition system which have a low energy efficiency of only 25 % to 35% [1]. ICEs also produce an excessive amount of exhaust emissions. The idea of a Homogeneous Charged Microwave Ignition (HCMI) system is to combine the advantages of a Spark Ignition (SI) and of a Compression Ignition (CI) system. This can make a significant impact on the fuel consumption and the emissions from the combustion process. Through the HCMI system, the fuel inside of the engine cylinder will ignite simultaneously, which will improve the engines efficiency significantly. Computational simulations of a HCMI system are complex and time-consuming and to carry out three dimensional results of multivariable changes a high computational capacity is required. To provide viable simulations this paper compares the location of the Eigenfrequency against the resonance frequency and explores the usability of three dimensional simulations. The Finite Element Method (FEM) simulation software COMSOL is used to model the engine cavity and different optimisation techniques to optimise the certain system design [2]. This paper also investigates the multivariable change of a HCMI system and illustrates the results in a three dimensional graphics.