Title:
内燃機関の排気浄化装置
Document Type and Number:
Japanese Patent JP3997740
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine that can quickly elevate the temperature of a catalyst device and reliably regenerate it, while suppressing degradation in fuel economy in any operating condition by using an ignition timing retard method or an additional fuel injection method selectively depending on an operating condition of an internal combustion engine. SOLUTION: When a catalyst temperature Tcat of a storage type NOx catalyst 25 reaches or exceeds a temperature elevation setting temperature ZSTEMP set according to an S regeneration frequency D, only in a low load range of the internal combustion engine, a catalyst temperature elevation by an additional fuel injection (two-stage combustion) method is executed and an air-fuel ratio is enriched to release SOx.
More Like This:
Inventors:
Kojiro Okada
Yasuki Tamura
Yasuyuki Yamaguchi
Yasuki Tamura
Yasuyuki Yamaguchi
Application Number:
JP2001309463A
Publication Date:
October 24, 2007
Filing Date:
October 05, 2001
Export Citation:
Assignee:
MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
International Classes:
F02D41/04; F02P5/15; F01N3/08; F01N3/20; F01N3/28; F02D41/08; F02D41/34; F02D45/00
Domestic Patent References:
| JP11107813A | ||||
| JP2000192811A | ||||
| JP2001059415A | ||||
| JP7217474A | ||||
| JP2000145438A | ||||
| JP2000230417A |
Attorney, Agent or Firm:
Toshiro Mitsuishi
Tadahiro Mitsuishi
Yasuyuki Tanaka
Tadahiro Mitsuishi
Yasuyuki Tanaka