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Patent Searching and Data


Title:
METHOD AND APPARATUS FOR CONTROLLING EGR
Document Type and Number:
WIPO Patent Application WO/2014/104628
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a method and an apparatus that are capable of extending an EGR control range and securing a stable EGR flow rate so as to achieve low temperature combustion. To achieve the abovementioned objective, the method for controlling EGR controls the recirculation of exhaust gas emitted from a combustion chamber of an engine, and includes: a data obtaining step that obtains data on an engine state and a supplied gas state; a current EGR rate calculating step that calculates a current EGR rate of the supplied gas based on the data; a required EGR rate setting step that sets a required EGR rate matching the data from a previously made target EGR rate map; an error calculating step that calculates the difference between the required EGR rate and the current EGR rate; and a control step that allows the current EGR rate to follow the required EGR rate by adjusting suction pressure of the supplied gas according to the difference and changing a recirculation amount of the exhaust gas.

Inventors:
SHIM, Eui Joon (5 Kumho bestvill, Sanghyeon-dongSuji-gu, Yongin-si, Gyeonggi-do 448-130, 448-130, KR)
HAN, Young Deok (997-47, Doksan 3-dongGeumcheon-gu, samSeoul 153-826, 153-826, KR)
SHIN, Seung Hyup (Rm.201, 553-224 Jayang 4-dong,Gwangjin-gu, Seoul 143-862, 143-862, KR)
Application Number:
KR2013/011616
Publication Date:
July 03, 2014
Filing Date:
December 13, 2013
Export Citation:
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Assignee:
DOOSAN INFRACORE CO., LTD. (7-11, Hwasu-dongDong-gu, Incheon 401-020, 401-020, KR)
International Classes:
F02D21/08; F02D41/04; F02M25/07
Foreign References:
JPH11200907A1999-07-27
KR870010301A
KR20110138919A2011-12-28
KR970006816A1997-02-21
KR20110063169A2011-06-10
Other References:
See also references of EP 2940275A4
None
Attorney, Agent or Firm:
HANBEOT PATENT & LAW FIRM (15th Fl. Salvation Army Bldg, 7 Chungjeong-ro,Seodaemun-gu, Seoul 120-013, 120-013, KR)
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