Investigation on Control Parameters of Ignition Process of HCCI Engine

Mathematical model for combusion of HCCI engine has been developed in this paper.Using two kinds of mixture as fuel,the influence of cetane number,octane number,compression ratio,equivalence ratio,intake charge temperature and pressure in the ignition process of HCCI engine has been evaluated.The results indicate that the ignition delays of combustion increase with increase of the octane number or decrease of the cetane number.The start of ignition is strongly affected by fuel structure and the running conditions of the simulation engine.The changes of the compression ratio,equivalence ratio,and initial temperature will bring on distinct change of the ignition of combustion.The initial pressure has slighter influence on the ignition delay for fuel.The influence of the control parameters to the ignition delay is increased with increase of the octane number and decrease of the cetane number of fuel.The resuits can provide some guidelines for the design,optimization and combustion control of HCCI engine.