STUDY OF THE INFLUENCE OF GEOMETRIC PARAMETERS ON THE DISPLACEMENT OF PISTON AND COMPRESSION RATIO FOR A VARIABLE COMPRESSION RATIO MECHANISM

Bogdan MĂNESCU, Ionuț DRAGOMIR, Nicolae-Doru STĂNESCU, Nicolae PANDREA

Abstract


A variable compression ratio mechanism is presented and the constrained relations between different parameters are established. The study is performed in two ways: by geometrical and multibody approaches. Based on the formulae deduced in this study, the authors determine the extreme positions of the piston and the compression ratio for certain geometric parameters. The variations of extreme positions and compression ratio depending on the dimensions’ variations of the elements are presented in graphical mode and the conclusions are highlighted. A special attention is paid to the tiller’s curve of a specific point.

Key words: variable compression ratio mechanism, extreme positions, compression ratio, lever’s curve, multibody.


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References


Freudenstein, F., Maki, E., R., Development of an Optimum Variable-Stroke Internal Combustion Engine Mechanism From the Viewpoint of Kinematic Structure, Journal of Mechanisms, Transmissions and Automation in Design, 1983.

Hoeltgebaum, T., Simoni, R., Martins, D., Reconfigurability of engines: A kinematic approach to variable compression ratio engines, Mechanism and Machine Theory 96 (2016).

Hara, V., Pandrea, N., Popa, D. Stan, M., Boncea, S., Motoare termice adaptative, Editura Universității din Pitești, 1995.

Clenci, A., Autoturism echipat cu motor cu raport de comprimare variabil, Raport de cercetare, 2003.

Miller, I., SAAB Variable Compression Motor, available online at www.me.udel.edu /meeg425/SaabVarComp.doc, 2001.

Mahlesh, P., J., Aparna, V., K., Variable compression ratio engine – A review of future power plant for automobile, International Journal of Mechanical Engineering Research and Development (IJMERD), Volume 2, Number 1 January- September 2012.

Teodorczyk, A., Variable compression ratio engine VR/LE concept, published on Institute of Heat Engineering Warsaw in 1995.

Published at http://freerepublic.com/ focus/f-news/1818771/posts by Red Badger in 2007.

SAE article http://articles.sae.org/6043/ published in 2009 by John Kendall.

SAE article http://articles.sae.org/15040/ published in 2016by John Kendall.

Nagarajaa, S., Sooryaprakashb, K., Sudhakaran, R., Investigate the Effect of Compression Ratio over the Performance and Emission Characteristics of Variable Compression Ratio Engine Fueled with Preheated Palm Oil -Diesel Blends, Procedia Earth and Planetary Science 11, 2015.

Mănescu, B., Dragomir, I., Stănescu, N.-D., The Transitory Vibrations for a Variable Compression Ratio Mechanism, AVMS 2017, Timișoara, 2017.

Teodorescu, P., P., Stănescu, N.-D., Pandrea, N., Numerical Analysis with Applications in Mechanics and Engineering, John Wiley & Sons, Hoboken, USA, 2013.


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