Title:
エンジンの排気浄化装置
Document Type and Number:
Japanese Patent JP3879511
Kind Code:
B2
Abstract:
A controller (6) computes the oxygen storage amount of the catalyst (3) separately as a high-speed component and a low speed component in accordance with actual characteristic. A target air-fuel ratio of an engine (1) is computed so that the oxygen storage amount is a predetermined target amount, and air-fuel ratio control of the engine (1) is performed. The oxygen storage amount is computed using an storage/release rate set according to the exhaust air-fuel ratio and catalyst temperature, etc. In this way, the oxygen storage amount of the catalyst can be precisely computed regardless of the variation in the storage/release rate which accompanies a catalyst temperature variation, and the real oxygen storage amount can therefore be controlled with a higher level of precision.
Inventors:
Masatomo Kakuyama
柿▲ざき▼ 成章
Osamu Matsuno
柿▲ざき▼ 成章
Osamu Matsuno
Application Number:
JP2001561903A
Publication Date:
February 14, 2007
Filing Date:
February 23, 2001
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
F02D41/14; F02D45/00; F01N3/24; F01N11/00; F02D41/02; F01N9/00
Domestic Patent References:
| JP5195842A | ||||
| JP6249028A | ||||
| JP7259602A | ||||
| JP2962987B2 | ||||
| JP6200803A | ||||
| JP10131788A | ||||
| JP10131790A | ||||
| JP10131791A | ||||
| JP3217633A |
Attorney, Agent or Firm:
Masaki Goto
Yoshio Matsuda
Yoshio Matsuda