Title:
EXHAUST EMISSION CONTROL DEVICE
Document Type and Number:
Japanese Patent JP2021143625
Kind Code:
A
Abstract:
To provide an exhaust emission control device improving the emission control performance and of suppressing the pressure loss.SOLUTION: The exhaust emission control device includes a honeycomb base material, and an inflow cell side catalyst layer, the honeycomb base material having a porous partition wall defining a plurality of cells extending from the inflow side end face to the outflow side end face, the plurality of cells including inflow cells and outflow cells neighboring each other across the partition wall, the inflow side catalyst layer being provided on the surface on the inflow cell side in an inflow side region from the inflow side end of the partition wall to a predetermined position on the outflow side. The ratio Ka/Kb of a gas permeation factor is within 0.4-0.8, where Ka is the gas permeation factor of the inflow side partition wall part including the inflow side region of the partition wall and an inflow cell side catalyst layer and Kb is the gas permeation factor of the outflow side partition wall part including an outflow side region at least from a predetermined position of the partition wall to the outflow side end.SELECTED DRAWING: Figure 2
Inventors:
SUGIURA KOJI
NISHIOKA HIROMASA
MIYOSHI NAOTO
SATO AKEMI
NAKAJIMA RYOTA
IKEBE MASATOSHI
MURAWAKI KEISUKE
ORI HIROTAKA
NISHIOKA HIROMASA
MIYOSHI NAOTO
SATO AKEMI
NAKAJIMA RYOTA
IKEBE MASATOSHI
MURAWAKI KEISUKE
ORI HIROTAKA
Application Number:
JP2020042686A
Publication Date:
September 24, 2021
Filing Date:
March 12, 2020
Export Citation:
Assignee:
TOYOTA MOTOR CORP
CATALER CORP
CATALER CORP
International Classes:
F01N3/28; B01D53/94; B01J23/46; B01J35/04; F01N3/022; F01N3/035; F01N3/10; F01N3/24
Domestic Patent References:
| JP2008272737A | 2008-11-13 |
Foreign References:
| WO2018173557A1 | 2018-09-27 |
Attorney, Agent or Firm:
Hiraki International Patent Office