This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Knock Sensor Background Analysis and Their Relation with Combustion Pressure Curve
Technical Paper
2016-36-0403
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Knocking is one of the major issues on modern high compression spark ignition engines, and the actual challenge is how to effectively control its occurrence protecting the engine, without performance impact. Modern cars incorporate knock-sensor systems for engines to minimize knocking, which can maximize engine lifetime, increase power, and improve fuel economy.The choice of the sensor type may depend of a wide number of factors and boundary conditions as the engine size, market segment or fuel. It's very common to use for mass production engines a knock sensor with a wide range bandwidth in detriment of the tuned one.Wide range bandwidth knock sensors are sensible to all engine vibration frequencies, therefore, this knock sensor configuration implies in a more complex signal processing than the necessary for a tuned sensor. The occurrence of different interferences, mechanical and electrical may be observed in the point of view of the ECU and it may interfere in knock detection.This study involves the investigation of combustion pressure effects, valve events and fuel air ratio in the knock sensor background noise levels and their consequences in knock detection in two different natural aspirated spark ignition engines, a 2.4 liter equipped with variable valve actuation -operating with gasoline and ethanol in three different charges. The data are processed using Fast Fourier Transform (FFT) on Matlab and the results are plotted in function of frequency and time domain.
Recommended Content
Authors
Topic
Citation
Pimenta, C., Trevas, I., Navegantes, W., Souza Montemor, R. et al., "Knock Sensor Background Analysis and Their Relation with Combustion Pressure Curve," SAE Technical Paper 2016-36-0403, 2016, https://doi.org/10.4271/2016-36-0403.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 |
Also In
References
- Xiaofeng , G. Stone , R. and Hudson , C. The Detection and Quantification of Knock in Spark Ignition Engines SAE Technical Paper 932759 1993
- Jeffrey , D. et all. Analysis of Combustion Knock Metrics in Spark-Ignition Engines SAE Technical Paper 2006
- Arrigoni , V. , Cornetti , G. , Gaetani , B. and Ghezzi , P. Quantitative Systems for Measuring Knock Proc. Instn.Mech. Engrs. 1972 186
- Steven K. M. Fundamentals of Statistical Signal Processing Detection Theory Prentice Hall
- Heywood , J.B. Internal Combustion Engine Fundamentals New York, NY McGraw-Hill 1988 930
- Puzinauskas , P. V. 1992 Examination of Methods used to Characterize Engine Knock International Congress & Exposition Detroit Michigan
- Grandin , B. and Denbratt , I. The Effect of Knock on Heat Transfer in SI Engines SAE Technical Paper 2002-01-0238
- Filardi J.B.C. and Medeiros E.B. Characterization of a Single Cylinder Research Engine Related to the Knock 21st International Congress of Mechanical Engineering, natal, RN Brazil October, (2011)
- Carstens-Behrens S. , Urlaub M. , Böhme J.F. , Förster J. and Raichle F. FEM Approximation of Internal Combustion Chambers for Knock Investigations SAE Technical Paper 2002-01-0237 2002
- Draper , C. S. Pressure Wave Accompanying Detonation in the Internal Combustion Engine Journal of the Aeronautic Sciences 5 6 219 226 1938
- Brunt M.F.J. , Pond C.R. and Biundo J. Gasoline Engine Knock Analysis using Cylinder Pressure Data SAE World Congress Detroit Michigan 980896 1998
- Leppard , W. R. Individual-Cylinder Knock Occurrence and Intensity in Multi-Cylinder Engines SAE Paper 820074 1982
- Chun , K.M. and Heywood , J.B. Characterization of Knock in a Spark-Ignition Engine SAE Paper 890156 1989
- Benson , G. , Fletcher , E.A. , Murphy , T.E. and Scherrer , H.C. Knock (Detonation) Control by Engine Combustion Chamber Shape SAE Paper 830509 1983
- Ferraro , C.V. , Marzano , M. and Nuccio , P. Knock Limit Measurement in High Speed SI Engines SAE Paper 850127 1985
- Stotsky Alexander A. Automotive Engines -Control, Estimation, Statistical Detection Springer-Verlag Berlin Heidelberg 2009
- Eng , J. A. 2002 Characterization of Pressure Waves in HCCI Combustion 2002 SAE World Congress Detroit Michigan March 04-07 2002-01-2859
- Alvarenga , L. R. , Vianna , M. E. , Pierobom , M.C. , Andrade , R. V. G. Estimativa de Perdas por Atrito e Bombeamento em Motores de Combustão Interna Flex com Sistema de Atuação de Válvulas Variável Utilizando Medição de Pressão na Câmara de Combustão