EXHAUST GAS TREATMENT METHOD AND DEVICE FOR INTERNAL COMBUSTION ENGINE

Title:

EXHAUST GAS TREATMENT METHOD AND DEVICE FOR INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2011/099172

Kind Code:

A1

Abstract:

In order to prevent unburned HC components from being released to the outside in large quantities in the period from after early post-injection until a diesel oxidation catalyst reaches an activating temperature, the power in an oil circulation pump (74) is increased until an early post-injection initiation time (t1) by reducing the throttle opening of a variable throttle mechanism (77) disposed in an oil passage (72) or by increasing the value set for the hydraulic level detected by a hydraulic sensor (78) that is disposed downstream of the variable throttle mechanism (77). As a result, the release of unburned HC components to the outside is suppressed until the diesel oxidation catalyst (50) reaches the activating temperature by increasing the load of a diesel engine (10) and increasing the exhaust gas temperature gradient in the temperature elevation stage of the diesel oxidation catalyst.

Inventors:

YAMADA SATOSHI (JP)
ENDO HIROYUKI (JP)

Application Number:

PCT/JP2010/059938

Publication Date:

August 18, 2011

Filing Date:

June 11, 2010

Export Citation:

Click for automatic bibliography generation Help

Assignee:

MITSUBISHI HEAVY IND LTD (JP)
YAMADA SATOSHI (JP)
ENDO HIROYUKI (JP)

International Classes:

F02D11/02; F01N3/02; F02D45/00

Foreign References:

JP2006152870A	2006-06-15
JP2009264315A	2009-11-12
JP2005069148A	2005-03-17
JP2005351153A	2005-12-22
JPH1054270A	1998-02-24
JP2009191654A	2009-08-27
JP2006029092A	2006-02-02

Other References: