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Title:
METHOD AND APPARATUS FOR DETECTING A MISFIRE OF AN INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2011/138999
Kind Code:
A1
Abstract:
The present invention relates to a method and apparatus for detecting a misfire which may occur during the operation of an internal combustion engine, and which, in particular, not only detects a misfire, but also detects which cylinder of a multi-cylinder engine has misfired. The method and apparatus for detecting a misfire of an internal combustion engine according to the present invention involves detecting whether or not a misfire has occurred by means of the frequency which varies according to the rotational angular velocity of the rotating shaft of an engine, and quickly detecting which cylinder has misfired by matching the top dead center of a reference cylinder against the top dead centers of the individual cylinders, and using the peak position of the rotational angular velocity signal filtered by a band-pass filter. Therefore, by quickly detecting a misfire in an internal combustion engine and in which cylinder the misfire occurred, and taking preventative measures, an accident such as the stalling of the internal combustion engine can be prevented, and the service life thereof can be lengthened.

Inventors:
OH, Kwang Suk (101 Seongju-dong, Changwon, Gyeongsangnam-do 641-120, 641-120, KR)
오광석 (경상남도 창원시 성주동 101번지, 641-120 Gyeongsangnam-do, 641-120, KR)
PARK, Jeong Geun (41-2, Daewon-dongChangwon, Gyeongsangnam-do 641-807, 641-807, KR)
박정근 (경상남도 창원시 대원동 41-2, 641-807 Gyeongsangnam-do, 641-807, KR)
Application Number:
KR2010/003448
Publication Date:
November 10, 2011
Filing Date:
May 31, 2010
Export Citation:
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Assignee:
STXENGINE CO., LTD. (80 Seongsan-dong, Changwon, Gyeongsangnam-do 641-315, 641-315, KR)
에스티엑스엔진 주식회사 (경상남도 창원시 성산동 80, 641-315 Gyeongsangnam-do, 641-315, KR)
OH, Kwang Suk (101 Seongju-dong, Changwon, Gyeongsangnam-do 641-120, 641-120, KR)
오광석 (경상남도 창원시 성주동 101번지, 641-120 Gyeongsangnam-do, 641-120, KR)
PARK, Jeong Geun (41-2, Daewon-dongChangwon, Gyeongsangnam-do 641-807, 641-807, KR)
International Classes:
F02D45/00; F02D35/00; F02D41/22; G01M15/11
Foreign References:
KR950005897B11995-06-02
KR100325162B1
KR100305832B1
KR100412820B1
Other References:
See also references of EP 2568149A1
None
Attorney, Agent or Firm:
KIM, Hak Soo et al. (2F Kolon Digital Tower Billant 2, 222-8 Guro3-dong, Guro-gu, Seoul 152-848, 152-848, KR)
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Claims: