EXHAUST GAS PURIFICATION SYSTEM

Title:

EXHAUST GAS PURIFICATION SYSTEM

Document Type and Number:

WIPO Patent Application WO/2016/039451

Kind Code:

A1

Abstract:

In order to effectively prevent combustion in the engine from becoming unstable when initiating and terminating catalyst regeneration, this exhaust gas purification system is provided with a NOx reduction catalyst 32 disposed in the exhaust gas passage of the internal combustion engine, an intake airflow sensor 40, and a control unit 50 which performs regeneration treatment for switching the exhaust air-fuel ratio from a lean state to a rich state by using both air system control for reducing the air intake amount and injection system control for increasing the fuel injection amount. During the regeneration treatment initiation period of switching from the lean the state to the rich state, and/or during the regeneration treatment termination period of switching from the rich state to the lean state, the control unit 50 changes the fuel injection timing and/or the fuel injection amount of the internal combustion engine 10 in accordance with a detected value of the intake airflow sensor 40.

Inventors:

NISHITO MASAAKI (JP)
NAKADA TERUO (JP)
SAKAMOTO TAKAYUKI (JP)
NAGAOKA DAIJI (JP)
GABE MASASHI (JP)

Application Number:

PCT/JP2015/075875

Publication Date:

March 17, 2016

Filing Date:

September 11, 2015

Export Citation:

Click for automatic bibliography generation Help

Assignee:

ISUZU MOTORS LTD (JP)

International Classes:

F02D41/04; F01N3/08; F01N3/36; F02D41/18; F02D41/40; F02D43/00; F02D45/00

Foreign References:

JP2006299952A	2006-11-02
JPH11210524A	1999-08-03
JP2003322015A	2003-11-14
JP2004239268A	2004-08-26
JP2006336581A	2006-12-14

Other References: