| abstract |
A gasoline engine exhaust gas stream treatment system having a particulate matter filter, the particulate matter filter comprising: A particulate matter filter substrate; An inlet layer provided on the exhaust gas inlet surface of the filter substrate; An exhaust port layer provided on the exhaust gas exhaust port surface of the filter substrate, A treatment system wherein the inlet layer comprises Rh and / or Pd and the outlet layer comprises Rh and / or zeolite. [Selection] Figure 1 |