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Analysis and Discussion of Diesel Engine Powertrain Torsional Resonance During Start-Up
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 05, 2003 by SAE International in United States
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A phenomenon exists in diesel or compression ignition engine powertrains with torsionally flexible couplings where the powertrain sometimes cannot accelerate through a torsional resonance such as during engine start-up. This phenomenon is sometimes referred to as resonance stall, resonance hang-up, or a jackhammer start. The current theory is that the hysteretic damping of an elastomeric coupling is dissipating input energy from the engine, thereby prohibiting the system from accelerating through the resonance.
This theory comes about because the elastomeric coupling, with its hysteretic damping, heats up during resonance and is obviously dissipating energy. By conducting a theoretical study of the energy balances of vibration for a powertrain model and by carefully considering field observations, this paper will show that energy dissipated by the torsionally flexible coupling does not come at the expense of the mean or working torque that was input by the engine. Therefore, this energy dissipation is not the root cause of resonance stall. Further, by considering the overall powertrain response to resonance, this paper presents a new theory for the cause of resonance stall.
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CitationSweeney, S., "Analysis and Discussion of Diesel Engine Powertrain Torsional Resonance During Start-Up," SAE Technical Paper 2003-01-1721, 2003, https://doi.org/10.4271/2003-01-1721.
- Barickman James R. “Flexible Elastomeric Couplings for Torsional Vibration Isolation,” Society of Automotive Engineers, Inc. Paper # 840792
- Porter Frederic P. “Harmonic Coefficients of Engine Torque Curves,” American Society of Mechanical Engineers Journal of Applied Mechanics 1943 A-33
- Hafner K.E. “Influence of the Reciprocating Masses of Crank Mechanisms on Torsional Vibrations of Crankshafts,” Proc. 11th Intl. Congr. Combust. Engrg. 1 69 90 1975
- Krumm H. “Forced and Parametric Excitation of Torsional Crankshaft Vibrations,” VDI Berichte 320 87 93 1978
- Den Hartog J.P. Mechanical Vibrations 3rd New York McGraw-Hill Book Company 1947 213 224 247 260
- Wilson W.Ker Practical Solution of Torsional Vibration Problems I 2nd John Wiley & Sons 1940 434 457
- Lewis Frank M. “Vibrations During Acceleration Through a Critical Speed,” Transactions of the American Society of Mechanical Engineers 54 253 261 1932
- Hafner K.E. “Torsional Stresses of Shafts Caused by Reciprocating Engines Running through Resonance Speeds,” American Society of Mechanical Engineers
- Rizzoni Giorgio Connolly Francis T. “Estimate of IC Engine Torque from Measurement of Crankshaft Angular Position,” Society of Automotive Engineers, Inc. Paper 932410
- Power Systems Research St. Paul, MN