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Cylinder by Cylinder Torque Production non-Uniformity Evaluation
Technical Paper
2005-01-3762
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The paper presents the development of a model study whose results enable to evaluate the torque production non-uniformity between the cylinders of an Internal Combustion Engine (ICE). This non-uniformity can be due, for example, to different air breathing into the cylinders, to different injector characteristics, or to pathological operating conditions such as misfires or misfuels, as well as to other abnormal operating conditions. Between the nominal torque production and the one corresponding to the absence of combustion there exist, in fact, a series of possible intermediate conditions, each of them corresponding to a value of produced torque between the nominal value and the one corresponding to the lack of combustion (due for example to statistical dispersion in manufacturing, or aging in the injection system).
The diagnosis of this type of non-uniformity is a very important issue in today's engine control strategies design. The use of the developed study should in fact allow the control strategy to adopt the appropriate interventions if the diagnosed non-uniformity is for example related to different behavior of the injectors.
In order to evaluate this torque production variability, cylinder by cylinder, information contained in the instantaneous crankshaft speed fluctuations has been processed using a suitable model. The procedure has been validated on an L4 engine in an engine test cell; the in-cylinder pressure signals have been acquired together with the instantaneous engine speed in order to determine the indicated torque produced by each cylinder, and thus evaluate the real cylinder by cylinder torque non-uniformity.
The procedure is able to diagnose abnormal combustions that do not necessarily involve lack of combustion, with the accuracy needed for on-board use. Control interventions to injection and ignition time commands of one or more cylinders should re-establish the torque production uniformity.
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Citation
Ponti, F., "Cylinder by Cylinder Torque Production non-Uniformity Evaluation," SAE Technical Paper 2005-01-3762, 2005, https://doi.org/10.4271/2005-01-3762.Also In
References
- Willimowski, M. Isermann, R. A Time Domain Based Diagnostic System for Misfire Detection in Spark-Ignition Engines by Exhaust Gas Pressure Analysis SAE Technical Paper 2000-01-0366
- Lee, A. Pyko, J. S. Engine Misfire Detection by Ionization Current Monitoring SAE Technical Paper 950003
- Chung, Y. Bae, C. Choi, S. Yoon, K. Application of a Wide Range Oxygen Sensor for the Misfire Detection SAE Technical Paper 1999-01-1485
- Ribbens, W. W. Park, J. Road Tests of a Misfire Detection System SAE Technical Paper 940975
- Iida, K. Akishino, K. Kido, K. IMEP Estimation from Instantaneous Crankshaft Torque Variation SAE Technical Paper 900617
- Williams, J. An Overview of Misfiring Cylinder Engine Diagnostic Techniques based on Crankshaft Angular Velocity Measurements SAE Technical Paper 960039
- Moskwa J. J. Wang W. Bucheger D. J. A New Methodology for Engine Diagnostics and Control Utilizing “Synthetic” Engine Variables: Theoretical and Experimental Results 64 Proceedings of the ASME, Dynamic Systems and Control Division ASME 1998
- Forster, J. Lohmann, A. Mezger, M. Ries-Muller, K. Advanced Engine Misfire Detection for SI-Engines SAE Technical paper 970855
- Klenk, M. Moser, W. Muller, W. Wimmer, W. Misfire Detection by Evaluating Crankshaft Speed - a Means to Comply with OBD II SAE paper 930399
- Plapp, G. Klenk, M. Moser, W. Methods of On-Board Misfire Detection SAE Technical paper 900232
- California Air Resources Board “Technical Status Update and Proposed Revisions to Malfunction and Diagnostic System Requirements Applicable to 1994 and Subsequent California Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles - (OBD II)” CARB Staff Report 1991
- Kiencke U. Nielsen L. Automotive Control Systems For Engine Driveline, and Vehicle Springer SAE Internationnal 2000
- Guezenec Y. G. Gyan Ph. A Novel Approach to Real-Time Estimation of the Individual Cylinder Combustion Pressure for S.I. Engine Control SAE Paper 1999-01-0209
- Citron, S. J. O'Higgins, J. E. Chen, L. Y. Cylinder by Cylinder Engine Pressure and Pressure Torque Waveform Determination Utilizing Speed Fluctuation SAE Paper 890486
- Chen, K. S. Chen, S. Engine Diagnostics by Dynamic Shaft Measurement: A Progress Report SAE Paper 932412
- Taraza, D. Henein, N. A. Bryzik, W. The Frequency Analysis of the Crankshaft's Speed Variation: A Reliable Tool for Diesel Engine Diagnosis ASME Journal of Engineering for Gas Turbine and Power 125 July 2003 791 796
- Taraza, D. Statistical Correlation Between the Crankshaft's Speed Variation and engine Performance - Part I: Theoretical Model ASME Journal of Engineering for Gas Turbine and Power 123 April 2001 428 432
- Ponti, F. Indicated Torque Estimation Using a Torsional Behavior Model of the Engine SAE Technical paper 2005
- Ligier, J. L. Baron, E. Acyclisme et Vibrations 2002 Technip
- Cavina, N. Corti, E. Ponti, F. Setup of a Rapid Control Prototyping System for New Engine Control and Diagnostic Algorithms Testing Paper No. 01A3040, Control and Diagnostics in Automotive Applications Genova, Italy July 2001