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Engine Dynamics: Time-Based Versus Crank-Angle Based
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English
Abstract
Designers of engine controllers have usually used an experimental trial-and-error approach to determine the best reference basis for compensating the engine dynamics. This paper investigates the nature of engine dynamics, in particular whether the dynamics are time based or crank-angle based. First, available time-based dynamics for a 5.7-L V8 TBI engine and a 3.1-L V6 PFI engine are reviewed. Next, transformation formulae between time based and crank-angle based dynamics are derived. Crank-angle based dynamics for the two engines are computed using these formulae and the results are evaluated relative to the time based dynamics. Lastly, the reference basis for a 2.5-L L4 TBI engine operating in the idle-speed region is examined. All dynamics, except fuel dynamics, are less varying in the crank-angle domain than in the time domain.
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Authors
Citation
Chin, Y. and Coats, F., "Engine Dynamics: Time-Based Versus Crank-Angle Based," SAE Technical Paper 860412, 1986, https://doi.org/10.4271/860412.Also In
References
- Hopkins H. G. Borcherts R. H. “Discrete Time Modeling of the Torque Response of a Spark-Ignited Fuel-Injected Engine,” Application of Adaptive Control Narendra K. S. Monopoli R. V. Academic Press 1980
- Morris R. L. Borcherts R. H. Worlick M. V. Hopkins H. G. “Spark Ignition Engine Model Building - An Identification Approach to Throttle-Torque Response,” Int. J. of Vehicle Design 3 1 1982
- Borcherts R. H. “Recent Advances in Automotive Engine Control Research,” Inter-Society Energy Conversion Engineering Conference Los Angeles August 8-12 1982
- Morris R. L. Warlick M. V. Borcherts R. H. “Engine Idle Dynamics and Control: A 5.8 L Application,” SAE Paper No. 820778 1982
- Cassidy J. F. Athans M. Lee W. H. “On the Design of Electronic Automotive Engine Control Using Linear Quadratic Control Theory,” IEEE Transactions on AC AC-25 5 October 1980
- Wu H. Aquino C. F. Chou G. L. “A 1.6 Liter Engine and Intake Manifold Dynamic Model,” ASME Paper 83-WA/DSL-39 1984
- Dobner D. J. “Dynamic Engine Models for Control Development. Part I: Nonlinear and Linear Model Formulation,” GM Research Publication GMR-3783 June 13 1982
- Coats F. E. Fruechte R. D. “Dynamic Engine Models for Control Development. Part II: Application to Idle Speed Control,” GM Research Publication GNR-3789 January 1982
- Yuen W. W. Servati H. “A Mathematical Engine Model Including the Effect of Engine Emissions,” SAE Paper No. 840030 1984
- Chang M. F. Sell J. A. “A Linearized Model of Engine Torque and Carbon Monoxide Emissions,” GM Research Publication GMR-4042R April 27 1982
- DeLosh R. G. et al. “Dynamic Computer Simulation of a Vehicle with Electronic Engine Control,” SAE Paper No. 810447 February 1981
- Aquino C. F. “Transient A/F Control Characteristics of the 5 Liter Central Fuel Injection Engine,” SAE Paper No. 810494 1981
- Hires S. D. Overington M. T. “Transient Mixture Strength Excursions - An Investigation of Their Causes and the Development of a Constant Mixture Strength Fueling Strategy,” SAE Paper No. 810495 1981
- Hamberg D. R. Klick D. “The Measurement and Improvement of the Transient A/F Characteristics of an Electronic Fuel Injection System,” SAE Paper No. 820766 1982
- Stivender D. L. “Engine Air Control - Basis of a Vehicular System Control Hierarchy,” SAE Paper No. 780346 1978
- Ogata K. Modern Control Engineering Prentice-Hall, Inc. 1970
- Fruechte R. D. Coats F. E. Folkerts C. H. “Idle Speed Control for Automobiles - A Modeling and Simulation Design Approach,” GM Research Publication GMR-4070 August 1982
- Sell J. A. Chang M. F. “Closed-Loop Control of an Engine's Carbon Monoxide Emission Using an Infrared Diode Laser,” SAE Paper No. 820388 1982
- Amann C. A. “Control of the Homogeneous-Charge Passenger-Car Engine - Defining the Problem,” GM Research Publication GMR-3229 March 11 1980