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A Study on the Improvement of Misfire Detection Method with Vibration by using the Weight Factor  

Lim Jihoon (School of Electrical Engineering, Seoul National University)
Lee Taeyeon (School of Electrical Engineering, Seoul National University)
Kim Ealgoo (School of Electrical Engineering, Seoul National University)
Hong Sungrul (School of Electrical Engineering, Seoul National University)
Sung Jinho (School of Electrical Engineering, Seoul National University)
Park Jaehong (School of Electrical Engineering, Seoul National University)
Yoon Hyungjin (Research & Development Division of Hyundai Motor Company)
Park Jinseo (Research & Development Division of Hyundai Motor Company)
Kim Dongsun (Research & Development Division of Hyundai Motor Company)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.13, no.4, 2005 , pp. 74-80 More about this Journal
Abstract
This paper presents a misfire monitoring method by using the weight factor. According to OBD II(On-Board Diagnostics) regulations of the CARB (California Air Resources Board), an ECU (Electronic Control Unit) should detect misfires which occur in the internal combustion engine. A misfire is 1311owe4 by post-oscillations for short duration. Sometimes, the amplitude of oscillations may be as high as misfire and can be falsely detected as another misfire. To prevent this, the software designers do not attempt to detect another misfire for this short duration, during which the post oscillations exist. Because of this, ECU does not detect all the misfires and hence, the unstable state of automobile cannot be detected. If this happens for a long time, automobile may get damaged. To solve these problems, this paper suggests a new algorithm to detect misfire by using weighting factor Weighting factor is a concept to distinguish the misfire with the post oscillation and to improve the detection rate. This value of weighting factor is used for counting the misfire. This paper also shows the result of experiment done on a automobile using this software. The software is implemented using ASCET-SD which is preferred in the design of engine control. This paper's result show the possibility of improving the misfire detection by implementing this algorithm.
Keywords
ECU; Misfire; Weight factor; Suppression section on following detected Misfire; Detection section having no suppression section; MIL(malfunction indicator lamp), Ignition timing;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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