4445488 Exhaust gas recirculation control for diesel engine: Takeshi Tanaka,Hisasi Kawai,Toshihiko Igashira,Kiyonori Sekiguchi,Mitsumasa Yamada,Michio Kawagoe,Masaaki Tanaka,Toyohashi, Japan assigned to Nippon Soken Inc; Toyota Jidosha Kabushiki Kais |