Title:
EXHAUST PURIFICATION FILTER
Document Type and Number:
WIPO Patent Application WO/2014/083642
Kind Code:
A1
Abstract:
This exhaust purification filter (4) for collecting particulate matters that are contained in an exhaust gas, which is suitable to be disposed within an exhaust passage of an internal combustion engine, is provided with: exhaust gas inflow passages and exhaust gas outflow passages which are alternately arranged with each other; and porous partition walls (6) which separate these exhaust gas inflow passages and exhaust gas outflow passages from each other. Each partition wall is divided into: a coated zone (CZ) in which the surface of a partition wall base is covered with a coating layer that has an average pore diameter smaller than the average pore diameter of the partition wall base; and a non-coated zone (NCZ) which is in the downstream of the coated zone and in which the surface of the partition wall base is not covered with the coating layer. The pore diameter of the partition wall is set so that ash contained in the exhaust gas is able to pass through the partition wall in the non-coated zone. The flow path resistance in the thickness direction of a portion of the partition wall positioned in the coated zone is smaller than the flow path resistance in the thickness direction of a portion of the partition wall positioned in the non-coated zone.
Inventors:
OTSUKI HIROSHI (JP)
NISHIOKA HIROMASA (JP)
TSUKAMOTO YOSHIHISA (JP)
IMAI DAICHI (JP)
ITOH KAZUHIRO (JP)
KOUTAKE RYOTA (JP)
NISHIOKA HIROMASA (JP)
TSUKAMOTO YOSHIHISA (JP)
IMAI DAICHI (JP)
ITOH KAZUHIRO (JP)
KOUTAKE RYOTA (JP)
Application Number:
PCT/JP2012/080770
Publication Date:
June 05, 2014
Filing Date:
November 28, 2012
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
OTSUKI HIROSHI (JP)
NISHIOKA HIROMASA (JP)
TSUKAMOTO YOSHIHISA (JP)
IMAI DAICHI (JP)
ITOH KAZUHIRO (JP)
KOUTAKE RYOTA (JP)
OTSUKI HIROSHI (JP)
NISHIOKA HIROMASA (JP)
TSUKAMOTO YOSHIHISA (JP)
IMAI DAICHI (JP)
ITOH KAZUHIRO (JP)
KOUTAKE RYOTA (JP)
International Classes:
B01D39/20; F01N3/022; B01D46/00; F01N3/023; F01N3/035
Foreign References:
| JP2012117487A | 2012-06-21 | |||
| JP2002519186A | 2002-07-02 | |||
| JP2004068635A | 2004-03-04 | |||
| JP2008307456A | 2008-12-25 | |||
| JP2012077693A | 2012-04-19 | |||
| JP2004130229A | 2004-04-30 |
Other References:
See also references of EP 2927444A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)
Aoki 篤 (JP)
Download PDF: