Title:
空燃比制御方法及び排気浄化装置
Document Type and Number:
Japanese Patent JP6484531
Kind Code:
B2
Abstract:
To improve injection efficiency and stability of post injection required for regeneration of a nitrogen oxide occlusion catalyst. An average post-injection amount as a post-injection amount that is unambiguously determined for each cylinder on the basis of PID control, an-air fuel ratio detected by a lambda sensor, and a target average air-fuel ratio as a target air-fuel ratio is computed (S100). Next, a post-injection deviation by cylinder that corresponds to an excess/shortage amount in a post-injection amount for each of the cylinders with respect to the average post-injection amount is computed on the basis of a characteristic deviation by cylinder that corresponds to a variation in the air-fuel ratio of each of the cylinders (S200 and S300). Post injection is performed by setting an addition result of the average post-injection amount and the post-injection deviation by cylinder as a post-injection amount by cylinder that is the post-injection amount required for each of the cylinders to realize the target average air-fuel ratio.
Inventors:
Kei Takahashi
Application Number:
JP2015173253A
Publication Date:
March 13, 2019
Filing Date:
September 02, 2015
Export Citation:
Assignee:
ROBERT BOSCH GMBH
International Classes:
F02D41/14; B01D53/94; F01N3/08; F01N3/24; F02D41/04; F02D41/38; F02D45/00
Domestic Patent References:
| JP2008223620A | ||||
| JP10252544A | ||||
| JP201158440A |