*teruaki kumazawa1,2, Masakazu Baba2, Yusuke Yamashiro2, Mariko Hayashi2,3, Manabu Takei2,4, Kimimori Hamada1, Shinsuke Harada2, Yoshiyuki Yonezawa2, Hajime Okumura2
(1. Toyota Motor Corp.(Japan), 2. National Institute of Advanced Industrial Sience and Technology(AIST)(Japan), 3. DENSO CORP.(Japan), 4. Fuji Electric Co., Ltd.(Japan))