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Title:
EXHAUST GAS RECIRCULATION DEVICE AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2016/103393
Kind Code:
A1
Abstract:
An exhaust gas recirculation (EGR) device that includes: an EGR pipe (34A) that recirculates, as EGR gas, a portion of the exhaust gas from an exhaust pipe (24) of a diesel engine (10) to an intake pipe (12); an EGR control valve (34C) that controls the flow volume of the EGR gas; an EGR cooler (34B) that is interposed in the EGR pipe (34A) and performs a heat exchange between the EGR gas and a coolant; and a control unit (36) that controls the EGR control valve (34C) in accordance with the operating state of the diesel engine (10). The control unit (36) is configured such that when condensate water from moisture contained in the EGR gas in the EGR cooler (34B) is generated, an EGR cleaning mode is executed, in which the control unit (36) forcefully opens the EGR control valve (34C) regardless of the operating state of the diesel engine (10), allowing the EGR gas to flow through the EGR cooler (34B).

Inventors:
TANIUCHI TOSHIHIRO (JP)
MIYATA KAZUNORI (JP)
MORITA HIROFUMI (JP)
Application Number:
PCT/JP2014/084294
Publication Date:
June 30, 2016
Filing Date:
December 25, 2014
Export Citation:
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Assignee:
VOLVO TRUCK CORP (SE)
TANIUCHI TOSHIHIRO (JP)
MIYATA KAZUNORI (JP)
MORITA HIROFUMI (JP)
International Classes:
F02M25/07
Foreign References:
US6904898B12005-06-14
JP2014222034A2014-11-27
JP2011132852A2011-07-07
Attorney, Agent or Firm:
OGAWA, Moriaki et al. (JP)
Moriaki Ogawa (JP)
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