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AssigneeToyota Jidosha Kabushiki Kaisha
InventorsShinya Hirota, Toshiaki Tanaka, Kazuhiro Itoh, Koichiro Nakatani, Koichi Kimura
Estimating the term…
The present device for purifying the exhaust gas of an internal combustion engine comprises a particulate filter 70 arranged in the exhaust system and reversing means 71 for reversing the exhaust gas upstream side and the exhaust gas downstream side of the particulate filter. The trapped particulates are oxidized on the particulate filter, and the particulate filter has a trapping wall for trapping the particulates. The trapping wall has a first trapping surface and a second trapping surface. The reversing means reverses the exhaust gas upstream side and the exhaust gas downstream side of the particulate filter so that the first trapping surface and the second trapping surface are used alternately to trap the particulates.
A device for purifying the exhaust gas of an internal combustion engine comprising a particulate filter arranged in the exhaust system and reversing means for reversing the exhaust gas upstream side and the exhaust gas downstream side of said particulate filter, wherein the trapped particulates are oxidized on said particulate filter, said particulate filter has a trapping wall for trapping the particulates, said trapping wall has a first trapping surface and a second trapping surface, and said reversing means reverses the exhaust gas upstream side and the exhaust gas downstream side of said particulate filter so that said first trapping surface and said second trapping surface are used alternately to trap the particulates.
A device for purifying the exhaust gas of an internal combustion engine comprising a particulate filter arranged in the exhaust system and reversing means for reversing the exhaust gas upstream side and the exhaust gas downstream side of said particulate filter, wherein said particulate filter carries an active-oxygen releasing agent, active-oxygen released from said active-oxygen releasing agent oxidizes the trapped particulates on said particulate filter, said active-oxygen releasing agent holds NOx to combine the NOx with oxygen when excessive oxygen is present in the surroundings and releases to decompose the combined NOx and oxygen into NOx and active-oxygen when the oxygen concentration in the surroundings drops, said particulate filter has a trapping wall for trapping the particulates, said trapping wall has a first trapping surface and a second trapping surface, said reversing means reverses the exhaust gas upstream side and the exhaust gas downstream side of said particulate filter so that said first trapping surface and said second trapping surface are used alternately to trap the particulates, and the oxygen concentration in said surroundings is sometimes made to drop.
Dependencies are inferred from the claim text.