US 12,173,634 B2
Particulate filter
Ryo Tasaki, Kakegawa (JP); Ryota Onoe, Kakegawa (JP); Masaya Ito, Kakegawa (JP); Momoko Iwai, Kakegawa (JP); and Yamato Matsushita, Kakegawa (JP)
Assigned to Cataler Corporation, Kakegawa (JP)
Appl. No. 18/568,875
Filed by Cataler Corporation, Kakegawa (JP)
PCT Filed Dec. 9, 2021, PCT No. PCT/JP2021/045310
§ 371(c)(1), (2) Date Dec. 11, 2023,
PCT Pub. No. WO2022/269947, PCT Pub. Date Dec. 29, 2022.
Claims priority of application No. 2021-104292 (JP), filed on Jun. 23, 2021.
Prior Publication US 2024/0280038 A1, Aug. 22, 2024
Int. Cl. F01N 3/035 (2006.01); B01D 39/20 (2006.01); B01D 46/24 (2006.01); B01D 53/94 (2006.01); B01J 20/32 (2006.01); B01J 23/63 (2006.01); B01J 35/56 (2024.01); F01N 3/022 (2006.01); F01N 3/08 (2006.01); F01N 3/24 (2006.01); F01N 3/28 (2006.01)
CPC F01N 3/035 (2013.01) [F01N 3/0224 (2013.01); B01D 39/20 (2013.01); B01D 46/2418 (2013.01); B01D 46/2429 (2013.01); B01D 46/24491 (2021.08); B01D 46/24492 (2021.08); B01D 53/9454 (2013.01); B01D 53/9459 (2013.01); B01D 53/9468 (2013.01); B01D 2239/1208 (2013.01); B01D 2255/1023 (2013.01); B01D 2255/1025 (2013.01); B01D 2255/2042 (2013.01); B01D 2255/2065 (2013.01); B01D 2255/915 (2013.01); B01D 2255/9155 (2013.01); B01J 20/3231 (2013.01); B01J 23/63 (2013.01); B01J 35/56 (2024.01); F01N 3/0222 (2013.01); F01N 3/0821 (2013.01); F01N 3/24 (2013.01); F01N 3/28 (2013.01); F01N 2330/06 (2013.01); F01N 2510/068 (2013.01); F01N 2510/0682 (2013.01); F01N 2510/0684 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A particulate filter disposed in an exhaust system of an internal combustion engine and used to capture a particulate matter in exhaust gas exhausted from the internal combustion engine,
the particulate filter comprising:
a wall-flow type base material having an inlet cell with an opening only at an exhaust gas inlet end, an outlet cell with an opening only at an exhaust gas outlet end, and a porous partition partitioning the inlet cell and the outlet cell; and
an outercoat layer that is a porous layer including multiple granules and is provided on a surface of the partition in contact with the inlet cell, wherein
the outercoat layer at least includes:
a lower layer provided on the surface of the partition in contact with the inlet cell; and
an upper layer provided to cover the lower layer,
a mean particle diameter of the granules in the upper layer is larger than a mean particle diameter of the granules in the lower layer,
the mean particle diameter of the granules in the lower layer is from 0.4 μm to 2.0 μm inclusive, and
the mean particle diameter of the granules in the upper layer is from 2.0 μm to 7.0 μm.