Spark-ignition engine knock control and threshold value determination

Yun Young Ham, Kwang Min Chun, Jae Hyung Lee, Kwang Soo Chang

Research output: Contribution to conferencePaperpeer-review

15 Citations (Scopus)


Knock control algorithms were developed for a spark-ignition engine. Spark timing was controlled using cylinder block vibration signal. The vibration signal of a 1.5 L four cylinder spark-ignition engine was measured using an accelerometer which was attached to the cylinder block. The maximum amplitude of the bandpass-filtered accelerometer signals was used as the knock intensity. Three different spark-ignition engine knock control algorithms were tested experimentally. Two algorithms were conventional algorithms in which knock threshold values were predetermined for each engine condition. Spark timing was retarded and advanced depending on the knock intensity in one algorithm and the knock occurrence interval in the other algorithm. The third algorithm was a new algorithm in which knock threshold values were automatically corrected by monitoring knock condition. Knock condition was determined by the nondimensional variance of the 10 cycles' cylinder block vibration data which were sampled continuousely for each cylinder. It was confirmed that the value of nondimensional variance could be used as a tool of knock threshold value determination.

Original languageEnglish
Publication statusPublished - 1996 Dec 1
EventInternational Congress and Exposition - Detroit, MI, United States
Duration: 1996 Feb 261996 Feb 29


OtherInternational Congress and Exposition
Country/TerritoryUnited States
CityDetroit, MI

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering


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