patent · US7296401
Device for purifying the exhaust gas of an internal combustion engine
20 November 2007
Indexed reference — no copy held
This patent is cited by material in the archive, so it is indexed here by number, title and inventor. The archive holds no copy of its text.
Abstract
A device for purifying the exhaust gas of an internal combustion engine is disclosed. The device includes a particulate filter arranged in the exhaust system, which carries a catalyst for absorbing and reducing NO<SUB>x</SUB>. The catalyst absorbs NO<SUB>x </SUB>when the air-fuel ratio in the surrounding atmosphere thereof is lean and releases the absorbed NO<SUB>x </SUB>to purify NO<SUB>x </SUB>by reduction when the air-fuel ratio is stoichiometric or rich. The device furthe...
Provenance
- Collection
- Cited prior art
- Original PDF
- patentimages.storage.googleapis.com →
- Filed
- 2004-04-22
- Source
- Google Patents bibliographic record
- Granted
- 2007-11-20
- Inventors
- Takamitsu Asanuma; Toshiaki Tanaka; Shinya Hirota; Kazuhiro Itoh; Koichiro Nakatani; Koichi Kimura; Kotaro Hayashi; Souichi Matushita; Yukihiro Tsukasaki; Toyota Motor Corp