Nixon Peabody LLP
Exhaust gas purifying system for engine
 An exhaust gas purifying system includes an exhaust gas purifying catalyst having a nitrogen oxide absorbing material which is installed in an exhaust line of an engine and performs split fuel injection to inject fuel directly into each combustion chamber partly during a suction stroke and partly during a compression stroke to provide and supply an increased amount of carbon monoxide to the nitrogen oxide absorbing material so as thereby to desorb sulfur oxides from the nitrogen oxide absorbing material. 
Mazda Motor Corporation
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Makoto Hideharu Junichi Tadataka Hiroshi Tomomi Kenji Akihide Hirofumi Youichi Masayuki
Kyogoku Iwakuni Taga Nakazumi Yamada Watanabe Okamoto Takami Nishimura Kuji Kuroki