Title:
EXHAUST EMISSION CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/1993/025805
Kind Code:
A1
Abstract:
An NOx absorbing agent (17) is disposed inside an exhaust gas passage of a combustion engine. This NOx absorbing agent (17) absorbs NOx when the air/fuel ratio of exhaust gas flowing thereinto is lean, and discharges NOx which it has absorbed when the air/fuel ratio of exhaust gas flowing thereinto becomes rich. When the air/fuel ratio of exhaust gas flowing into the NOx absorbing agent (17) is to be made rich so as to discharge NOx from the NOx absorbing agent, a higher NOx absorbing agent temperature makes the degree of richness higher and rich time shorter.
Inventors:
TAKESHIMA SHINICHI (JP)
TANAKA TOSHIAKI (JP)
IGUCHI SATOSHI (JP)
KATOH KENJI (JP)
KIHARA TETSURO (JP)
TANAKA TOSHIAKI (JP)
IGUCHI SATOSHI (JP)
KATOH KENJI (JP)
KIHARA TETSURO (JP)
Application Number:
PCT/JP1993/000777
Publication Date:
December 23, 1993
Filing Date:
June 10, 1993
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
TAKESHIMA SHINICHI (JP)
TANAKA TOSHIAKI (JP)
IGUCHI SATOSHI (JP)
KATOH KENJI (JP)
KIHARA TETSURO (JP)
TAKESHIMA SHINICHI (JP)
TANAKA TOSHIAKI (JP)
IGUCHI SATOSHI (JP)
KATOH KENJI (JP)
KIHARA TETSURO (JP)
International Classes:
B01D53/04; B01D53/94; F01N3/08; F01N9/00; F02D41/02; F02D41/14; F01N3/20; F01N13/02; F02B1/04; (IPC1-7): F01N3/28; B01D53/34; B01J23/58; F01N3/24; F02D41/02
Foreign References:
| JPH02149715A | 1990-06-08 | |||
| JPH0156816B2 | 1989-12-01 | |||
| JPH04141219A | 1992-05-14 | |||
| JPH03194113A | 1991-08-23 | |||
| JPH041617U | 1992-01-08 | |||
| JPS60182325A | 1985-09-17 | |||
| JPS53115687A | 1978-10-09 | |||
| JPS6430643A | 1989-02-01 |
Other References:
See also references of EP 0598916A4
Attorney, Agent or Firm:
Shoichi UI. (Seiko Toranomon Bldg. 8-10, Toranomon 1-chom, Minato-ku Tokyo 105, JP)
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