Engine Modeling of HCCI Transient Operations

Control strategies for HCCI (Homogeneous Charge Compression Ignition) operation in 4-cylinder, 4-stroke engines were investigated using a simple engine model, which is composed of intake, combustion and gas exchange sub-models. The model can determine, cycle-by-cycle, cylinder-by-cylinder, control'variables, such as air mass, residual gas mass, temperature at the beginning of the compression stroke, combustion start timing in a wide range of exhaust valve closing timings and clearance volumes. The calculation results were compared with experimental results which have been presented previously. The model can simulate combustion fluctuation during a operation mode change from spark ignition to HCCI with variable exhaust valve closing timings and clearance volumes. Also, the model can predict the control variables during transient in the compression ratio by clearance volume change and during low temperature combustion reaction, to develop control strategies of transient operations.

[1]  Bengt Johansson,et al.  HCCI Combustion Phasing with Closed-Loop Combustion Control Using Variable Compression Ratio in a Multi Cylinder Engine , 2003 .

[2]  Hans-Erik Ångström,et al.  Integrated Simulation and Engine Test of Closed Loop HCCI Control by aid of Variable Valve Timings , 2003 .

[3]  Bengt Johansson,et al.  HCCI Closed-Loop Combustion Control Using Fast Thermal Management , 2004 .

[4]  Olivier Grondin,et al.  Modelling the Compression Ignition Engine for Control: Review and Future Trends. , 2004 .

[5]  Jose Geiger,et al.  Controlled Auto Ignition Combustion Process with an Electromechanical Valve Train , 2003 .

[6]  Bengt Johansson,et al.  Operating range in a Multi Cylinder HCCI engine using Variable Compression Ratio , 2003 .

[7]  Yoshishige Ohyama.  Simultaneous Control of Air/fuel Ratio and Intake, Exhaust Valve Timing for HCCI Operation , 2003 .

[8]  Günter Karl Fraidl,et al.  CSI - Controlled Auto Ignition - the Best Solution for the Fuel Consumption - Versus Emission Trade-Off? , 2003 .

[9]  Zhili Chen,et al.  How to Put the HCCI Engine to Practical Use: Control the Ignition Timing by Compression Ratio and Increase the Power Output by Supercharge , 2003 .

[10]  Günter Karl Fraidl,et al.  The new AVL CSI engine : HCCI operation on a multi cylinder gasoline engine , 2004 .

[11]  Bengt Johansson,et al.  HCCI Combustion Phasing in a Multi Cylinder Engine Using Variable Compression Ratio , 2002 .

[12]  Ingemar Denbratt,et al.  Demonstrating a SI-HCCI-SI Mode Change on a Volvo 5-Cylinder Electronic Valve Control Engine , 2003 .