Research Papers: Gas Turbines: Combustion, Fuels, and Emissions

Normalized Knock Intensity Determination Based on the Knock Sensor Analysis to Have a Fixed Detection Threshold at Different Operating Conditions

[+] Author and Article Information
Mohammad Momeni Movahed

Department of Mechanical Engineering,
Amirkabir University of Technology,
Tehran 15875-4413, Iran
e-mail: m_momeni@aut.ac.ir

Hassan Basirat Tabrizi

Department of Mechanical Engineering,
Amirkabir University of Technology,
Tehran 15875-4413, Iran
e-mails: hbtabrizi@gmail.com; hbasirat@aut.ac.ir

Seyed Mostafa Agha Mirsalim

Department of Mechanical Engineering,
Amirkabir University of Technology,
Tehran 15875-4413, Iran
e-mail: mirsalim@csr.ir

1Corresponding author.

Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received March 9, 2015; final manuscript received September 29, 2015; published online November 17, 2015. Assoc. Editor: Stani Bohac.

J. Eng. Gas Turbines Power 138(6), 061501 (Nov 17, 2015) (9 pages) Paper No: GTP-15-1086; doi: 10.1115/1.4031789 History: Received March 09, 2015; Revised September 29, 2015

Processing the knock sensor's signal is the most common approach for knock detection in series production vehicles. Filtration, rectification, and integration in a defined knock window (KW) are main steps to compute the standard knock intensity (SKI). The SKI strongly depends on the engine operating conditions. In this study, a novel model is proposed based on the knock sensor analysis to determine the normalized knock intensity (NKI) with much less dependency on the operating conditions, cylinder numbers (CNs), and KW. Implementing the proposed normalization model, a fixed detection threshold can be used for knock detection at all operating conditions. To verify the model, an accurate knock detection method based on cylinder pressure analysis is utilized, which comprises intensity calculation and a novel technique for detection threshold determination. Experimental results at all operating conditions show a square of correlation coefficient greater than 0.7 when the knock intensity from the presented model is compared with the reference cylinder pressure based method. In addition, the model detects all heavy knocking cycles and there is no wrongly detected knocking combustion.

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Szwaja, S. , and Naber, J. D. , 2013, “ Dual Nature of Hydrogen Combustion Knock,” Int. J. Hydrogen Energy, 38(28), pp. 12489–12496. [CrossRef]
Pipitone, E. , and Genchi, G. , 2014, “ Experimental Determination of Liquefied Petroleum Gas–Gasoline Mixtures Knock Resistance,” ASME J. Eng. Gas Turbines Power, 136(12), p. 121502. [CrossRef]
Aliramezani, M. , Chitsaz, I. , and Mozafari, A. A. , 2013, “ Thermodynamic Modeling of Partially Stratified Charge Engine Characteristics for Hydrogen-Methane Blends at Ultra-Lean Conditions,” Int. J. Hydrogen Energy, 38(25), pp. 10640–10647. [CrossRef]
Shao, J. , and Rutland, C. J. , 2015, “ Modeling Investigation of Different Methods to Suppress Engine Knock on a Small Spark Ignition Engine,” ASME J. Eng. Gas Turbines Power, 137(6), p. 061506. [CrossRef]
Baloo, M. , Mollaei Dariani, B. , Akhlaghi, M. , and Chitsaz, I. , 2015, “ Effect of Iso-Octane/Methane Blend on Laminar Burning Velocity and Flame Instability,” Fuel, 144, pp. 264–273. [CrossRef]
Russ, S. , 1996, “ A Review of the Effect of Engine Operating Conditions on Borderline Knock,” SAE Technical Paper No. 960497.
Topinka, J. A. , Gerty, M. D. , Heywood, J. B. , and Keck, J. C. , 2004, “ Knock Behavior of a Lean-Burn, H2 and CO Enhanced, SI Gasoline Engine Concept,” SAE Technical Paper No. 2004-01-0975.
Jones, J. C. P. , Spelina, J. M. , and Frey, J. , 2014, “ Optimizing Knock Thresholds for Improved Knock Control,” Int. J. Engine Res., 15(1), pp. 123–132. [CrossRef]
Vavra, J. , Bohac, S. V. , Manofsky, L. , Lavoie, G. , and Assanis, D. , 2012, “ Knock in Various Combustion Modes in a Gasoline-Fueled Automotive Engine,” ASME J. Eng. Gas Turbines Power, 134(8), p. 082807. [CrossRef]
Momeni Movahed, M. , Basirat Tabrizi, H. , and Mirsalim, M. , 2014, “ Experimental Investigation of the Concomitant Injection of Gasoline and CNG in a Turbocharged Spark Ignition Engine,” Energy Convers. Manage., 80, pp. 126–136. [CrossRef]
Corti, E. , and Forte, C. , 2010, “ A Statistical Approach to Spark Advance Mapping,” ASME J. Eng. Gas Turbines Power, 132(8), p. 082803. [CrossRef]
Bika, A. S. , Franklin, L. , and Kittelson, D. B. , 2011, “ Engine Knock and Combustion Characteristics of a Spark Ignition Engine Operating With Varying Hydrogen and Carbon Monoxide Proportions,” Int. J. Hydrogen Energy, 36(8), pp. 5143–5152. [CrossRef]
Brecq, G. , Bellettre, J. , and Tazerout, M. , 2003, “ A New Indicator for Knock Detection in Gas SI Engines,” Int. J. Therm. Sci., 42(5), pp. 523–532. [CrossRef]
Cavina, N. , Corti, E. , Minelli, G. , Moro, D. , and Solieri, L. , 2006, “ Knock Indexes Normalization Methodologies,” SAE Technical Paper No. 2006-01-2998.
Syrimis, M. , and Assanis, D. N. , 2003, “ Knocking Cylinder Pressure Data Characteristics in a Spark-Ignition Engine,” ASME J. Eng. Gas Turbines Power, 125(2), pp. 494–499. [CrossRef]
Baral, B. , and Raine, R. , 2008, “ Knock in a Spark Ignition Engine Fuelled With Gasoline-Kerosene Blends,” SAE Technical Paper No. 2008-01-2417.
Checkel, M. , and Dale, J. , 1986, “ Testing a Third Derivative Knock Indicator on a Production Engine,” SAE Technical Paper No. 861216.
Shrestha, S. O. B. , and Rodrigues, R. , 2008, “ Effects of Diluents on Knock Rating of Gaseous Fuels,” Proc. Inst. Mech. Eng., Part A, 222(6), pp. 587–597. [CrossRef]
Pipitone, E. , and D'Acquisto, L. , 2003, “ Development of a Low-Cost Piezo Film-Based Knock Sensor,” Proc. Inst. Mech. Eng., Part D, 217(8), pp. 691–699. [CrossRef]
Brunt, M. F. J. , Pond, C. R. , and Biundo, J. , 1998, “ Gasoline Engine Knock Analysis Using Cylinder Pressure Data,” SAE Technical Paper No. 980896.
Park, J. K. , and Chae, J. O. , 2002, “ A Study on the Knocking and Misfire Detection System Using Breakdown Voltage Characteristics,” ASME J. Eng. Gas Turbines Power, 124(3), pp. 650–659. [CrossRef]
Loubar, K. , Bellettre, J. , and Tazerout, M. , 2005, “ Unsteady Heat Transfer Enhancement Around an Engine Cylinder in Order to Detect Knock,” ASME J. Heat Transfer, 127(3), pp. 278–286. [CrossRef]
Naber, J. D. , Blough, J. R. , Frankowski, D. , Goble, M. , and Szpytman, J. E. , 2006, “ Analysis of Combustion Knock Metrics in Spark-Ignition Engines,” SAE Technical Paper No. 2006-01-0400.
Ponti, F. , 2008, “ In-Cylinder Pressure Measurement: Requirements for On-Board Engine Control,” ASME J. Eng. Gas Turbines Power, 130(3), p. 032803. [CrossRef]
Jones, J. C. P. , Frey, J. , Muske, K. R. , and Scholl, D. J. , 2010, “ A Cumulative-Summation-Based Stochastic Knock Controller,” Proc. Inst. Mech. Eng., Part D, 224(7), pp. 969–983. [CrossRef]
Spelina, J. M. , Jones, J. C. P. , and Frey, J. , 2014, “ Characterization of Knock Intensity Distributions—Part 1: Statistical Independence and Scalar Measures,” Proc. Inst. Mech. Eng., Part D, 228(2), pp. 117–128. [CrossRef]
Szwaja, S. , Bhandary, K. R. , and Naber, J. D. , 2007, “ Comparisons of Hydrogen and Gasoline Combustion Knock in a Spark Ignition Engine,” Int. J. Hydrogen Energy, 32(18), pp. 5076–5087. [CrossRef]
Stotsky, A. A. , 2008, “ Statistical Engine Knock Modelling and Adaptive Control,” Proc. Inst. Mech. Eng., Part D, 222(3), pp. 429–439. [CrossRef]


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Fig. 2

Example of different steps for knock intensity determination using CPS (test #26, cylinder 4)

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Fig. 1

Schematic diagram of the experimental setup

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Fig. 3

SKI determination model based on knock sensor analysis

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Fig. 4

NKI determination model based on knock sensor analysis

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Fig. 10

Effect of ES, EL, MT, CN, and KWL on minimum and maximum appropriate detection thresholds of SKI (a) and NKI (b) models

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Fig. 5

Determination of KW in heavy (a) and light (b) knocking combustions (test #26, cylinder 4)

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Fig. 6

Frequency components of the KSS for a heavy knocking combustion in cylinder 4 of test #26

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Fig. 9

Detection thresholds for SKI and NKI models: (a) and (b) reference tests (cylinder 2 of test #4), (c) and (d) effect of CN (cylinder 4 of test #4), and (e) and (f) effect of ES (cylinder 2 of test #43)

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Fig. 7

Correlation between knock intensities from cylinder pressure and knock sensor analysis (test #26, cylinder 4, 6000 engine cycles): (a) SKI model and (b) NKI model

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Fig. 8

Comparison of knock detection using knock sensor and cylinder pressure analysis: (a) general description and (b) an example for cylinder 4 of test #26



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