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DOI: 10.7708/ijtte.2014.4(1).07

4 / 1 / 90-102 Pages


Krešimir Osman - Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Croatia -


This paper presents the development of the MOTORI 2004 computing tool that calculates the distance, speed and acceleration of a car engine valve train’s oscillating mass m, which is reduced to the valve axis. Distance diagrams, speed and accelerations are provided in dependence on the camshaft twist angle at a constant rotational speed in several consecutive revolutions. The computing tool implements a mathematical description and numerical solution for the motion of mass m of a valve gear dynamic model. Valve lift h is given numerically using a series of equidistant points in the period of one camshaft revolution. The variabilities of camshaft rotation and spring thread vibration as a result of cam lift harmonic excitation. The computing solutions were tested at valve opening points and in imaginary extreme operating conditions (soft/hard spring, low/high damping, low/high rotational speed and increased clearance.

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Cardona, A.; Lens, E.; Nigro, N. 2002. Optimal Design of Cams, Multibody System Dynamics. DOI: http://dx.doi.org/10.1023/A:1015278213069, 7(3): 285-305.


Carlini, A.; Rivola, A.; Dalpiaz, G.; Maggiore, A. 2002. Valve motion measurements on motorbike cylinder heads using high speed laser vibrometer. In Proceedings of the 5th International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, Ancona, Italy, 564-574.


Choi, T.D.; Eslinger, C.T.; Kelley, O.J.; David, J.W.; Etheridge, M. 2000. Optimization of Automotive Valve Train Components with Implicit Filtering, Optimization and Engineering. DOI: http://dx.doi.org/10.1023/A:1010071821464, 1(1): 9-27.


David, J.W.; Cheng, C.Y.; Choi, T.D.; Kelley, C.T.; Gablonsky, J. 1997. Optimal Design of High Speed Mechanical Systems, North Carolina State University, USA, Technical Report, CRSC-TR97-18.


De Wilde, E.F. 1967. Investigation of Engine Exhaust Valve Wear, Wear. DOI: http://dx.doi.org/10.1016/0043-1648(67)90007-5, 10(3): 231-244.


Derndinger, H.-O. 1959. Untersuchungen über das dynamische Verhalten der Ventile an Verbrennungsmotoren, PhD thesis, TH Karlruhe, Germany.


Dujmović, L.; Kozarac, D.; Lulić, Z. 2005. Numerical Simulation of Valve Train Dynamics. In Proceedings of the 10th EAEC European Automotive Congress, Belgrade, Serbia.


Hafner, K.E. 1973. Investigating the Dynamic Behavior of Valve Mechanisms with Engineering Vibration Methods. In Proceedings of 10th International Congress Combustion Engines, New York, USA, 313-337.


Houbolt, J.C. 1950. A recurrence matrix solution for the dynamic response of elastic aircraft, Journal of Aeronautical Sciences, 17(9): 540-550.


Jeon, H.S.; Park, K.J.; Park, Y.-S. 1989. An Optimal Cam Profile Design Considering Dynamic Characteristics of a Cam valve System, Experimental Mechanics. DOI: http://dx.doi.org/10.1007/BF02323851, 29(4): 357-363.


Kim, W.J.; Jeon, H.-S.; Park, Y.S. 1991. Contact Force Prediction and Experimental Verification on an OHC Finger-follower type Cam valve System, Experimental Mechanics. DOI: http://dx.doi.org/10.1007/BF02327568, 31(2): 150-156.


Kurz, D. 1954. Entwurf und Berechung ruckfreier Nocken, ATZ, 11: 293-299.


Levy, S.; Wilkinson, J.P.D. 1976. The Component Element Method in Dynamics, McGraw-Hill, USA.


Mahalec, I. 1996. The Dynamic Response of Valve Train due to the Cam Profile Errors, (in Croatian), PhD thesis, FMENA Zagreb, Croatia.


McAlpine, H.; Hicks, B.J.; Huetand, G.; Culley, S.J. 2006. An investigation into the use and content of the engineer’s logbook, Design Studies. DOI: http://dx.doi.org/10.1016/j.destud.2005.12.001, 27(4): 481-504.


Plötzner, R.; Lowe, R. (Eds.) 2004. Special Issue: Dynamic visualizations and learning, Learning and Instruction, 14: 235-357.


Schrick, P. 1969. Über das dynamische Verhalten von Ventilsteuerungen an Verbrennungsmotoren, PhD thesis, TU Carolo-Wilhelmina zu Braunschweig, Germany.


Teodorescu, M.; Kushwaha, M.; Rahnejat, H.; Taraza, D. 2012. Elastodynamic transient analysis of a fourcylinder valve train system with camshaft flexibility. In Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 226(1): 94-111.


Tounsi, M.; Chaari, F.; Walha, L.; Fakhfakh, T.; Haddar, M. 2011. Dynamic behavior of a valve train system in presence of camshaft Errors, WSEAS Transactions on Applied and Theoretical Mechanics, 6(1): 17-26.


Wagstaff, P.R. 1967. Analysis of Valve Gear Dynamics with a Digital Computer. In Proceedings of the Institution of Mechanical Engineers, 137-144.