公开(公告)号：US20170354911A1

公开(公告)日：2017-12-14

申请号：US15542215

申请日：2016-01-05

Applicant: DENSO CORPORATION

Inventor： Hironori NIWA ,  Syusaku YAMAMURA ,  Mikio ISHIHARA ,  Takao MISHIMA ,  Shingo NAKATA ,  Hiroaki FUJII ,  Kouta YAMAKOSHI ,  Akira MIYASHITA

IPC: B01D46/24 ,  B01D39/20 ,  F01N3/022

CPC classification number: B01D46/247 ,  B01D39/2068 ,  B01D46/2429 ,  B01D46/2459 ,  B01D2046/2481 ,  B01D2046/2485 ,  B01D2046/2496 ,  B01D2279/30 ,  F01N3/022 ,  F01N3/0222 ,  F01N2330/00 ,  F01N2330/06 ,  F01N2330/34 ,  F01N2330/48 ,  Y02T10/20

Abstract: An exhaust gas filter purifies exhaust gas containing particulate matter emitted from an engine. The filter has cell walls and cells surrounded by the cell walls. Through pores formed in the cell walls, adjacent cells are communicated. The cells have open cells opening along an axial direction of the filter, and plugged cells. An upstream end part of the plugged cell is plugged by a plug member. On a cross section perpendicular to the axial direction, a flow-passage sectional area of the plugged cells is larger than a flow-passage sectional area of the open cells. A total length of the filter is not less than a first standard value and is not more than a critical length Lm determined by respective predetermined equations.