Treatment system for gasoline engine exhaust gas
AssigneeBASF SE
InventorsTorsten Neubauer, Marcus Hilgendorff, Stephan Siemund, Alfred H. Punke, Gerd Grubert
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Abstract
The present invention relates to a treatment system for a gasoline engine exhaust gas stream comprising a particulate filter, said particulate filter comprising: a particulate filter substrate, an inlet layer disposed on the exhaust gas inlet surface of the filter substrate, and an outlet layer disposed on the exhaust gas outlet surface of the filter substrate, wherein the inlet layer comprises Rh and/or Pd, and the outlet layer comprises Rh and/or a zeolite.
Claims22
A treatment system for a gasoline engine exhaust gas stream comprising a particulate filter, said particulate filter comprising:
- a particulate filter substrate,
- an inlet layer disposed on the exhaust gas inlet surface of the filter substrate,
- an outlet layer disposed on the exhaust gas outlet surface of the filter substrate, wherein the inlet layer comprises Rh and Pd and the outlet layer comprises Rh, or Rh and a zeolite, and
- wherein said system further comprises a three-way conversion (TWC) catalyst and/or an NOx-trap which is in fluid communication with the particular filter.
A treatment system for a gasoline engine exhaust gas stream comprising a particulate filter, said particulate filter comprising:
- a particulate filter substrate,
- an inlet layer disposed on the exhaust gas inlet surface of the filter substrate, and
- an outlet layer disposed on the exhaust gas outlet surface of the filter substrate, wherein the inlet layer comprises Rh, Pd, or both and the outlet layer comprises Rh, Pd, and a zeolite, and
- wherein said system further comprises a three-way conversion (TWC) catalyst and/or an NOx-trap which is in fluid communication with the particulate filter.
A treatment system for a gasoline engine exhaust gas stream comprising a particulate filter, said particulate filter comprising:
- a particulate filter substrate,
- an inlet layer disposed on the exhaust gas inlet surface of the filter substrate, and
- an outlet layer disposed on the exhaust gas outlet surface of the filter substrate, wherein the inlet layer comprises Rh and Pd and the outlet layer comprises Rh, a zeolite, or both, wherein the inlet layer, the outlet layer or both further comprise Pt, and
- wherein said system further comprises a three-way conversion (TWC) catalyst and/or an NOx-trap which is in fluid communication with the particulate filter.
Dependencies are inferred from the claim text.