Title:
EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP3733845
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To increase exhaust emission control effect by catalyst in stratified combustion operation when purifying exhaust gas by catalyst in an internal combustion engine.
SOLUTION: The exhaust gas generated by stratified combustion is separated into the exhaust gas contributed to the combustion and the exhaust gas not contributed to the combustion to make the exhaust gas contributed to the combustion to flow in a first exhaust passage 22a and make the exhaust gas not contributed to the combustion to flow in a second exhaust passage 22b. The separation of the exhaust gas is achieved by opening a first exhaust valve 23a in accordance with exhaust timing of the exhaust gas having high CO2 concentration. Moreover, an upstream side catalyst converter 24 is provided in only the first exhaust passage 22a to control an air-fuel ratio of the exhaust gas contributed to the combustion in accordance with types of catalysts (three-way catalyst, NOx trap catalyst, etc.), applied to the catalyst converter 24.
Inventors:
Akira Tayama
Hirofumi Tsuchida
Takashi Fukuda
Shunichi Shiino
Hirofumi Tsuchida
Takashi Fukuda
Shunichi Shiino
Application Number:
JP2000237007A
Publication Date:
January 11, 2006
Filing Date:
August 04, 2000
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
F02B17/00; F02D13/02; F01N3/08; F01N3/20; F01N3/24; F01N3/28; F02B23/10; F02D41/04; F02D41/06; F02D43/00; F02B75/12; (IPC1-7): F02D13/02; F01N3/08; F01N3/20; F01N3/24; F01N3/28; F02B17/00; F02B23/10; F02D41/04; F02D41/06; F02D43/00
Domestic Patent References:
| JP4325710A | ||||
| JP6129238A | ||||
| JP54147312U | ||||
| JP6280581A | ||||
| JP7166849A | ||||
| JP7158426A | ||||
| JP7091237A | ||||
| JP2000110644A |
Attorney, Agent or Firm:
Tomijio Sasashima