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3d-Elastohydrodynamic Simulation Model for Structure-Borne Noise Analyses of a DI Diesel Engine
Technical Paper
2016-01-1854
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The present article is concerned with the investigation of the engine noise induced by the piston slap of an actual passenger car Diesel engine. The focus is put on the coherence of piston secondary movement, impact of the piston on the cylinder liner, generated structure-borne noise excitation of the engine structure and the occurring acceleration on the engine surface. Additionally, the influence of a varying piston-pin offset and piston clearance is evaluated.
The analyses are conducted using an elastohydrodynamic multi-body simulation model, taking into account geometry, stiffness and mass information of the single components as well as considering elastic and hydrodynamic behavior of the piston-liner contact. A detailed description of the simulation model will be introduced in the article.
The obtained results illustrate the piston secondary motion and the related structure-borne noise on the engine surface for several piston-pin offsets and piston clearances. Detailed analyses of force and displacement in the transversal engine axis as well as the angular displacement of the piston and its derivatives are shown. Further on, the correlation between piston secondary movement and the occurring acceleration on the outer crankcase surface is investigated. Finally, several combinations of piston-pin offset and piston clearance are compared with respect to their NVH and friction behavior.
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Citation
Seifriedsberger, J., Wichtl, R., and Eichlseder, H., "3d-Elastohydrodynamic Simulation Model for Structure-Borne Noise Analyses of a DI Diesel Engine," SAE Technical Paper 2016-01-1854, 2016, https://doi.org/10.4271/2016-01-1854.Also In
References
- AVL List GmbH User Guide - AVL Excite Power Unit Version 2011.1 AVL List GmbH Dec. 2011
- Finger , K. Untersuchungen zur Kraftanregung durch die Ver-brennung beim direkteinspritzenden Common-Rail Dieselmotor unter Berücksichtigung des Körperschallübertragungsver-haltens Ph.D. thesis Department of Mechanical Engineering, Darmstadt University of Technology Darmstadt 2001
- Flotho , A. , and Spessert , B. Geräuschminderung an direktein-spritzenden Dieselmotoren - Teil 1 Automobil-Industrie: 255-261 March 1988
- Greenwood , J.A. , and Tripp , J.H. The Contact of Two Nominally Flat Rough Surfaces Proceedings of the Institution of Mechanical Engineers 185 625 633 1971
- Heuer , S. Verbrennungsgeräusch des direkteinspritzenden Hubkolbenmotors Ph.D. thesis Faculty of Mechanical Engineering, RWTH Aachen University Aachen 2001
- Hrdina , D. , Bargende , M. , Felbinger , F. , and Lang , J. Störge-räusche bei Motoren mit hohen Druckgradienten MTZ Moto-rentechnische Zeitschrift: 1010-1016 Dec. 2013
- Künzel , R. , Werkmann , M. , and Tunsch , M. Piston Related Noise with Diesel Engines Parameters of Influence and Optimization SAE Technical Paper 2001-01-3335 2001 10.4271/2001-01-3335
- MAHLE GmbH Pistons and engine testing Wiesbaden Vieweg+Teubner 2012
- Mollenhauer , K. , and Tschöke , H. Handbook of Diesel Engines Berlin Heidelberg Springer-Verlag 2010 10.1007/978-3-540-89083-6
- Offner , G. , Lorenz , N. , and Knaus , O. Piston Clearance Optimization using Thermo-elasto Hydrodynamic Simulation to Reduce Piston Slap Excitation and Friction Loss SAE Technical Paper 2012-01-1530 2012 10.4271/2012-01-1530
- Priebsch , H. , and Offner , G. Strukturdynamik, Akustik und numerische Methoden Lecture notes Graz University of Technology Graz 2013
- Rumplmayr , P. Combustion Noise Analysis of a Passenger Car DI-Diesel Engine Master thesis Institute of Internal Combustion Engines and Thermodynamics, Graz University of Technology Graz 2014
- Spessert , B. Geräuschreduktion von Viertakt-Diesel- und Ottomotoren - Rückblick und Stand der Technik MTZ Moto-rentechnische Zeitschrift: 508-517 Aug. 1999
- Wagner , A. Investigation of friction behavior of modern internal combustion engines Ph.D. thesis Institute of Internal Combustion Engines and Thermodynamics, Graz University of Technology Graz 2014
- Zeller , P. Handbuch Fahrzeugakustik, Grundlagen, Auslegung, Berechnung, Versuch, 2. Auflage Wiesbaden Vieweg+Teubner 2012