Relevant bibliographies by topics / Cranktrain dynamics

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Cranktrain dynamics'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 February 2022

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Journal articles on the topic "Cranktrain dynamics"

1

안기원, HWANGWONGUL, and 성원석. "Dynamic Stress Analysis of Cranktrain Using Flexible Multi-Body Dynamic Model." Journal of the Korean Society of Mechanical Technology 12, no. 4 (December 2010): 67–74. http://dx.doi.org/10.17958/ksmt.12.4.201012.67.

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Lee, So-duk, Ben A. Shannon, and Antonin Mikulec. "Cranktrain system geometry optimisation and dynamic assembly of parametric solid models." International Journal of Vehicle Design 23, no. 1/2 (2000): 16. http://dx.doi.org/10.1504/ijvd.2000.001879.

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Ricci, Stefano, Marco Troncossi, and Alessandro Rivola. "Model Reduction of the Flexible Rotating Crankshaft of a Motorcycle Engine Cranktrain." International Journal of Rotating Machinery 2011 (2011): 1–9. http://dx.doi.org/10.1155/2011/143523.

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This paper addresses the development of an elastodynamic model of a motorcycle engine cranktrain aimed at accurately evaluating the interactions between the crankshaft and the engine block, thus allowing an improved structural design. A rigid multibody model is first implemented and simulated; only kinematic joints are involved at this stage, leading to a statically determinate assembly of the mechanism. Such a modelling approach prevents the loads at certain interface locations to be evaluated; furthermore, high-frequency dynamic effects cannot be predicted. These drawbacks can be removed by introducing bushing-like elements and/or modelling component flexibility. In this paper, this latter aspect is the objective of the investigation; in particular, a finite element model of the crankshaft is implemented as a replacement for the corresponding rigid member. The well-established Craig-Bampton model reduction technique is used to represent the elastodynamic behaviour of the component with a limited number of coordinates. The mode selection procedure is emphasized here: a measure of modal dynamic importance, namely the effective interface mass fraction, is used to rank fixed-interface normal modes based upon their contribution to loads at the substructure interface; choosing the modal base according to such ranking leads to a minimal yet accurate representation.
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Ricci, S., M. Troncossi, and A. Rivola. "Modal Selection Through Effective Interface Mass With Application to Flexible Multibody Cranktrain Dynamics." Journal of Computational and Nonlinear Dynamics 9, no. 1 (September 25, 2013). http://dx.doi.org/10.1115/1.4025280.

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The development of a multibody model of a motorbike L-twin engine cranktrain is presented in this work. The need for an accurate evaluation of the loads acting on the main engine components at high rotational speed makes it necessary to take element flexibility into account in order to capture elastodynamic effects, which might have a major impact on the dynamics of the system. Starting from finite element descriptions of both the crankshaft and the connecting rod, the classical Craig–Bampton (CB) technique is employed to obtain reduced models, which are suitable for the subsequent multibody analysis. A particular component mode selection procedure is implemented based on the concept of effective interface mass, allowing an assessment of the accuracy of the reduced model prior to the nonlinear simulation phase. Bearing dynamics also plays an important role in such a high-speed engine application: angular contact ball bearings are modeled according to a 5DOF nonlinear scheme in order to grasp the main bearings behavior while an impedance-based hydrodynamic bearing model is implemented providing an enhanced operation prediction at big end locations. The assembled cranktrain model is simulated using a commercial multibody software platform. Numerical results demonstrate the effectiveness of the procedure implemented for the flexible component model reduction. The advantages of this technique over the traditional mode truncation approach are discussed.
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Dissertations / Theses on the topic "Cranktrain dynamics"

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Přeslička, Jaroslav. "Vyvážení tříválcového traktorového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231700.

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The thesis deals with analysis of balancing of given cranktrain. At the introductory part is solved kinematics of the crank mechanism. Another part of the text occupies with dynamics of the crank mechanism and eventuality of its balancing with using of point-mass model. This simplified model is utilized for analytic solution of given mechanism. Results of analytic solution are compared with results of MBS solution. At the last part is done analysis of minimal distance between the selected parts of the mechanism. Then simple optimization of balancing is done. At the end is considered balancing of the mechanism and simple improvement is proposed, considered are results of minimal distance analysis too.
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Ricci, Stefano <1982&gt. "Model reduction techniques in flexible multibody dynamics with application to engine cranktrain simulation." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5882/.

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The development of a multibody model of a motorbike engine cranktrain is presented in this work, with an emphasis on flexible component model reduction. A modelling methodology based upon the adoption of non-ideal joints at interface locations, and the inclusion of component flexibility, is developed: both are necessary tasks if one wants to capture dynamic effects which arise in lightweight, high-speed applications. With regard to the first topic, both a ball bearing model and a journal bearing model are implemented, in order to properly capture the dynamic effects of the main connections in the system: angular contact ball bearings are modelled according to a five-DOF nonlinear scheme in order to grasp the crankshaft main bearings behaviour, while an impedance-based hydrodynamic bearing model is implemented providing an enhanced operation prediction at the conrod big end locations. Concerning the second matter, flexible models of the crankshaft and the connecting rod are produced. The well-established Craig-Bampton reduction technique is adopted as a general framework to obtain reduced model representations which are suitable for the subsequent multibody analyses. A particular component mode selection procedure is implemented, based on the concept of Effective Interface Mass, allowing an assessment of the accuracy of the reduced models prior to the nonlinear simulation phase. In addition, a procedure to alleviate the effects of modal truncation, based on the Modal Truncation Augmentation approach, is developed. In order to assess the performances of the proposed modal reduction schemes, numerical tests are performed onto the crankshaft and the conrod models in both frequency and modal domains. A multibody model of the cranktrain is eventually assembled and simulated using a commercial software. Numerical results are presented, demonstrating the effectiveness of the implemented flexible model reduction techniques. The advantages over the conventional frequency-based truncation approach are discussed.
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Fridrichová, Kateřina. "Vypínání válců zážehového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417418.

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This thesis focuses on a technology called cylinder deactivation. The technology helps reducing emissions and fuel consumption. The first part summarizes the possibilities of application of the cylinder deactivation technology as well as advantages resulting from combination with other technologies. The thesis also consists of two design options for valvetrain in inline four-cylinder engine and the results of simulations of dynamics of its cranktrain.
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Langer, Zdeněk. "Hnací ústrojí řadového tříválcového vznětového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-227888.

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Increasing requirements on products quality e.g. internal combustion engines, and growing demand on producing major parts lead to the giant development of the engines. With the engine development also great progress in the software tools has come. By decreasing costs on production of the prototypes and by support of the measured data the verification of the computational models is possible. This development has connection with using CAE tools like CAD systems, FEM programs and multi-body systems. The subject of this thesis is about using these systems to solve cranktrain dynamic. Also cranktrain dynamic results are introduced there. Interaction between the engine block and the crankshaft is solved by the hydrodynamic bearing model. All simulation methods are presented on a diesel free-cylinder in-line engine.
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Kovář, Lukáš. "Silikonový tlumič torzních kmitů šestiválcového vznětového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318694.

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The aim of this thesis is to design crankshaft for in-line six-cylinder diesel engine and to design viscous torsional vibration damper for the cranktrain of specified parameters. The thesis includes the creation of a dynamic torsional model of cranktrain and calculation of forced vibrations of mechanism with and without damper. Part of this thesis is also strength analysis of the designed crankshaft with damper using the Finite Element Method (FEM).
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Conference papers on the topic "Cranktrain dynamics"

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Zhao, Zhenfeng, Fujun Zhang, Ying Huang, Zhenyu Zhang, and Dan Wu. "Study of Performance Characteristics of Opposed-Piston Folded-Cranktrain Engines." In ASME 2013 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icef2013-19198.

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This paper discusses a prototype of horizontally opposed-piston folded-cranktrain two-stroke diesel engine with combined supercharger and high-pressure common rail fuel system by Beijing Institute of Technology. The cranktrain dynamics, the thermodynamics (include the combustion process and the scavenging) are investigated, which is the main difference between this type of engine and conventional engines. The aim of the work is to design and develop a prototype of opposed-piston folded-cranktrain engine. The investigated results showed that maximum speeds of two pistons are all 13.99m/s, while the mean velocity is 9.4 m/s; the maximum acceleration on negative side is 3765 m/s2 when the piston is near the BDC and the maximum acceleration on positive side is 2944 m/s2 when the pistons is near the TDC; scavenging efficiency can get to 89% and the final air utilization is 55%. The prototype of opposed-piston folded-cranktrain engine has been developed.
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Parikyan, Tigran. "Unified Approach to Generate Crankshaft Dynamic Models for 3D and Torsional Vibration Analyses." In ASME 2003 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ices2003-0591.

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The paper considers two kinds of crankshaft dynamic models which can be used to analyze cranktrain dynamics: structured model, consisting of mass nodes connected by binary elastic elements — for 3D dynamic simulation, and equivalent torsional model — for torsional vibration analysis. A methodology of automatic generation of both models, sharing the same data in form of CAD model, is presented. The dynamic equivalence of both models is demonstrated, and their correlation with the original volumetric FE model is discussed. The main advantage of the method is a significant reduction of effort to generate the structured and torsional models.
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Mehrgou, Mehdi. "Study the Effect of Torsional Vibration on Valvetrain Dynamic in a Heavy Duty Diesel Engine Using Multi-Body Dynamic." In ASME 2009 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/icef2009-14029.

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Today, due to technical, commercial and environmental requirements, internal combustion engines especially heavy duty diesel engines must operate with high cylinder pressures and the components must be optimized for the best performance. Heavy duty diesel engines usually rotate the driven machinery with a large inertia such as generators, or ship propeller. A crankshaft is subjected to periodic dynamic loads; also other inconsistencies could make misfire in engine and because of the torsional vibration in engine, the crankshaft has fluctuating instantaneous speed. Due to the essence of this type of the engine which has heavy parts, beside the robust design of them, and relatively high torques which need to rotate the camshaft, these engines valvetrain normally drive with gears. In consequence the rotating speed of engine crankshaft completely transfer to the camshaft because of high amount of crank train’s inertia in comparison with the valve train and in some cases using the damper for camshaft is required. Modern calculation methods allow for the precise determination of system dynamic and loads. Thus, it is possible to consider design margins that ensure sufficient reliability to avoid undesired dynamic behavior which could lead to structural failures, besides avoiding the components over sizing. In this paper ADAMS\Engine commercial software has been used for simulating the coupled engine cranktrain and valve train subsystems of an engine under development. The engine complete dynamic simulation with Multi-Body Dynamic tool including backlash in gear train and torsionally flexible camshaft, prepare a good model for study the effect of engine cranktrain dynamics on its valvetrain.
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Thomassy, Fernand A. "Cranktrain Simulation of a Natural Gas Engine/Compressor." In ASME 2002 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/icef2002-512.

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Advancing simulation technologies are making it possible for engineers to construct models of increasing complexity and fidelity. Southwest Research Institute (SwRI®) has investigated integrated analysis techniques that account for the dynamic interaction of cylinder load, hydrodynamic bearing orbits and flexible structural components in a time-based multi-body structural simulation. Misalignment of the main bearing bore is also simulated to investigate a condition that affects this type of mechanical system. This paper describes general modeling techniques implemented in ADAMS/Engine and how the component models influence the prediction of crankshaft stress through simulation of an HBA-6 engine/compressor. The HBA-6 is one of a class of reciprocating compressors used in the gas pipeline and process industries. It has a unique layout of power and compressor cylinders that helps to highlight the robustness of the simulation technique.
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Pendovski, Denis, and Stefan Pischinger. "Dynamic oil pressure in connecting rod bearings and their influence on innovative cranktrain technologies." In 2019 JSAE/SAE Powertrains, Fuels and Lubricants. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2019. http://dx.doi.org/10.4271/2019-01-2333.

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Zhang, Zhenyu, Changlu Zhao, Dan Wu, Fujun Zhang, and Guoliang Luo. "Effect of Piston Dynamic on the Working Processes of an Opposed-Piston Two-Stroke Folded-Cranktrain Engine." In SAE 2014 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2014. http://dx.doi.org/10.4271/2014-01-1628.

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