Title:
エンジンの排気浄化装置
Document Type and Number:
Japanese Patent JP3591283
Kind Code:
B2
Abstract:
When an engine (1) is in an idle state and the engine rotation speed exceeds a predetermined value, fuel supply is stopped. In this state, fuel supply is resumed when there is a shift to a non-idle state or when the engine rotation speed falls below a predetermined value. The oxygen adsorption amount of a three-way catalyst during the time period when fuel supply is stopped, is calculated. The air- fuel ratio is made richer according to the oxygen adsorption amount of the three-way catalyst when fuel supply is resumed. By limiting the richness of the air-fuel ratio at this time, fluctuations of engine output torque in the idle running state are suppressed.
Inventors:
Tatsuo Sato
Application Number:
JP6180298A
Publication Date:
November 17, 2004
Filing Date:
March 12, 1998
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
F01N3/24; F01N3/08; F01N3/28; F02D31/00; F02D41/02; F02D41/04; F02D41/12; F02D41/14; (IPC1-7): F01N3/24; F01N3/08; F01N3/28; F02D41/04; F02D41/12; F02D41/14
Domestic Patent References:
| JP8193537A | ||||
| JP9049447A |
Attorney, Agent or Firm:
Masaki Goto
Yoshio Matsuda
Yoshio Matsuda