1. Extreme Energy‐Density Research Institute Nagaoka University of Technology Nagaoka Niigata Japan
2. Department of Science of Technology Innovation Nagaoka University of Technology Nagaoka Niigata Japan
3. Research Institute of Car and Life‐style Daihatsu Motor Co., Ltd. Kurume Fukuoka Japan
4. Department of Mechanical Engineering Nagaoka University of Technology Nagaoka Niigata Japan