1. Department of Mechanical System Engineering, Hiroshima University, Higashi-Hiroshima, Japan
2. Mechanical Engineering Collaborative Research Laboratory Advanced Automotive, Advanced Automotive Research Collaborative Laboratory Internal Combustion Engine System, Hiroshima University, Higashi-Hiroshima, Japan
3. Mazda Motor Corporation, Hiroshima, Japan
4. Fluid Engineering and Spray/Simulation Technology (FEST) Laboratory, Department of Mechanical Systems Engineering, Hiroshima University, Higashi-Hiroshima, Japan
5. Powertrain Development Division, Engine Performance Development Department, Mazda Motor Corporation, Hiroshima, Japan