EXHAUST PURIFICATION SYSTEM AND CATALYST REGENERATION METHOD

Title:

EXHAUST PURIFICATION SYSTEM AND CATALYST REGENERATION METHOD

Document Type and Number:

WIPO Patent Application WO/2016/140138

Kind Code:

A1

Abstract:

The present invention is provided with: an NOx occlusion/reduction catalyst 32 that is provided to an exhaust system of an internal combustion engine 10, that occludes NOx when exhaust is in a lean state, and that reduces NOx when exhaust is in a rich state; a regeneration control unit 60 that executes regeneration processing wherein exhaust is put in a rich state and NOx that is occluded in the NOx occlusion/reduction catalyst 32 is reduced; a storage unit 73 in which is pre-stored an exhaust lambda predictive value for when regeneration processing has been executed; a reduction amount estimation unit 74 that estimates NOx reduction amount for when regeneration processing has been executed; and a prohibition unit 75 that, when the estimated NOx reduction amount is below a prescribed minimum threshold value, prohibits the execution of regeneration processing by the regeneration control unit 60.

Inventors:

NAKADA TERUO (JP)
SAKAMOTO TAKAYUKI (JP)
NAGAOKA DAIJI (JP)
YUZA HIROYUKI (JP)

Application Number:

PCT/JP2016/055640

Publication Date:

September 09, 2016

Filing Date:

February 25, 2016

Export Citation:

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Assignee:

ISUZU MOTORS LTD (JP)

International Classes:

F01N3/20; F01N3/08

Foreign References:

JP2005291098A	2005-10-20
JP2014066232A	2014-04-17
JP2003184545A	2003-07-03

Other References: