EXHAUST GAS PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE

WIPO Patent Application WO/2012/011195

A1

An ambient NOx adsorption catalyst (24) that can adsorb NOx contained in an exhaust gas in the presence of CO under standard conditions is placed in an engine exhaust gas passage, in an internal combustion engine. Until an engine post-initiation catalyst (24) is activated, the amounts of a high-boiling-point hydrocarbon and an unsaturated hydrocarbon that are contained in the exhaust gas flowing into the catalyst (24) are reduced so that the NOx-adsorbing activity cannot be deteriorated by the adhesion activity of the hydrocarbons while maintaining the CO concentration in the exhaust gas flowing into the catalyst (24) at a level higher than the concentration required for the adsorption of NOx.

NAKAYAMA, Yusuke (1 Toyotacho, Toyota-sh, Aichi 71, 〒4718571, JP)
中山　裕介 (〒71 愛知県豊田市トヨタ町１番地トヨタ自動車株式会社内 Aichi, 〒4718571, JP)
SONODA, Yukihiro (1 Toyotacho, Toyota-sh, Aichi 71, 〒4718571, JP)
園田　幸弘 (〒71 愛知県豊田市トヨタ町１番地トヨタ自動車株式会社内 Aichi, 〒4718571, JP)

JP2010/062652

January 26, 2012

July 21, 2010

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TOYOTA JIDOSHA KABUSHIKI KAISHA (1 Toyotacho, Toyota-shi Aichi, 71, 〒4718571, JP)
トヨタ自動車株式会社 (〒71 愛知県豊田市トヨタ町１番地 Aichi, 〒4718571, JP)
NAKAYAMA, Yusuke (1 Toyotacho, Toyota-sh, Aichi 71, 〒4718571, JP)
中山　裕介 (〒71 愛知県豊田市トヨタ町１番地トヨタ自動車株式会社内 Aichi, 〒4718571, JP)
SONODA, Yukihiro (1 Toyotacho, Toyota-sh, Aichi 71, 〒4718571, JP)

F01N3/08; B01J20/02; F01N3/24

AOKI, Atsushi et al. (SEIWA PATENT & LAW, Toranomon 37 Mori Bldg. 5-1, Toranomon 3-chome, Minato-k, Tokyo 23, 〒1058423, JP)

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