SYSTEM OF TREATING EXHAUST GAS OF ENGINE

Title:

SYSTEM OF TREATING EXHAUST GAS OF ENGINE

Document Type and Number:

WIPO Patent Application WO/2011/111591

Kind Code:

A1

Abstract:

In order to relief a sudden change of engine sound during the transition to recovery control of a particulate removing filter or during returning from the recovery control, a system of treating exhaust gas of an engine includes an exhaust-gas particulate removing filter in an exhaust path, closes down the opening of an inlet throttle valve or an exhaust throttle valve to a recovery opening smaller than a normal opening during recovery of the particulate removing filter, and returns the opening from the recovery opening to the normal opening after the recovery of the particulate removing filter. The opening of the inlet throttle valve or the exhaust throttle valve during the closing process from the normal opening to the recovery opening and during the returning process from the recovery opening to the normal opening is changed at a gradually decreasing or gradually increasing rate of change of the opening.

Inventors:

TOGASHI TAICHI (JP)
OHTA ATSUSHI (JP)

Application Number:

PCT/JP2011/054853

Publication Date:

September 15, 2011

Filing Date:

March 03, 2011

Export Citation:

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Assignee:

YANMAR CO LTD (JP)
TOGASHI TAICHI (JP)
OHTA ATSUSHI (JP)

International Classes:

F02D9/02; F01N3/02; F02D41/04

Foreign References:

JP2005282535A	2005-10-13
JPH02294511A	1990-12-05
JP2008180095A	2008-08-07
JP2004301009A	2004-10-28
JP2002276405A	2002-09-25
JP2002276405A	2002-09-25

Other References: