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Knocking Quantification and the Development of a Knock Intensity Meter

Article of Honda R&D Technical Review Vol.12 No.1

Summary

An algorithm which processes pressure signals in cylinders with a first frequency element and quantifies it based on its maximum value and statistic processing, and a real time measuring system utilizing the algorithm were established. To attain high applicability this system employs not only generally applied pressure sensors but also plug washer type sensors that can be applied to each cylinder for pressure measurements. Further, nearly all of the processing is performed using software applications. Rewriting of the software is made possible due to the simplified operations and the application of a VME board equipped with a high performance MCU processing built-in flash ROM. In consideration of expanded application in the future, the system, further, utilizes a special interface to enable automatic operation with the bench top automatic measuring system.

Reference

(1) Yasunori Iwakiri, Kenichi Koizumi: Knock Intensity Detection Based on Heat Release In a Spark Ignition Engine, Transactions of JSAE Vol.23, No.3, p.3.33-p.3.37(1992) (Written in Japanese)
(2) Yasunori Iwakiri, Kenichi Koizumi: Knock Intensity Detection Based on Heat Release In a Spark Ignition Engine, Proc. of JSAE No.912, vol.3, p.85-88(1991) (Written in Japanese)
(3) Jun Takemura, Eiichi Koukima, Hikaru Asako: Analysis on the Transient Knock using the Knock-index Derived by the On-board Combustion Mode Analysis Internal Combustion Engine, Vol29, No.9, p.54-64(1996) (Written in Japanese)
(4) Teruyoshi Morita, Masahiro Sato: Quantification of Knocking and Development of Knock Intensity Meter, Proc. of Kanto Branch Meeting of JSME No.990-2, p.39-40(1999) (Written in Japanese)
(5) Checkel M. D., Dale J. D.: Computerized Knock Detection from Engine Pressure Records, SAE-Paper 860028
(6) Gschweitl K., Gotthard E. and Kampitsch A.: Real TimeKnock Analysis for Automatic Engine Mapping and Calibration, AVL List Gmbh

Author (organization or company)

Teruyoshi MORITA(Tochigi R&D Center)、Masahiro SATOH (Tochigi R&D Center)

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