Ing. Radim Dundálek, Ph.D.
E-mail:   dundalek@fme.vutbr.cz  Dept.:   Institute of Automotive Engineering Dept. of Powertrain Position:   Assistant Professor

Supervised courses:

• Automotive Technology (JDT-A)
• Vehicle Accessories (QPV)

Publications:

• DUNDÁLEK, R.:
  Plain Bearings in 5-cylinder In-line SI Engine,
  Dynamika tuhých a deformovatelných těles 2006 IV. mezinárodní konference. Sborník příspěvků, pp.41-46, ISBN 80-7044-782-6, (2006), Fakulta výrobních technologií a managementu UJEP Ústí n. L.
  conference paper
  akce: Dynamika tuhých a deformovatelných těles 2005, Ústí nad Labem, 12.10.2005-13.10.2005
• DUNDÁLEK, R.:
  Behaviour of hydrodynamic bearings under various working conditions,
  Sborník abstraktů, pp.17-25, ISBN 80-213-1510-5, (2006), Česká zemědělská univerzita v Praze, Fakulta technická
  conference paper
  akce: KOKA 2006 - XXXVII. mezinárodní konference kateder a pracovišť spalovacích motorů českých a slovenských vysokých škol, Kostelec nad Černými lesy, 19.09.2006-20.09.2006
• DUNDÁLEK, R.:
  Elastohydrodynamické modely ložisek jako moduly virtuálního motoru
  dissertation
• DUNDÁLEK, R.:
  Optimalizace vyvážení klikové hřídele pětiválcového motoru,
  FSI Junior konference 2005, (2006), Vysoké učení technické v Brně, Fakulta strojního inženýrství
  conference paper
• DUNDÁLEK, R.:
  Simulation of Plain Bearing Behaviour,
  Dynamika tuhých a deformovatelných těles 2005, pp.25-32, ISBN 80-7044-688-9, (2005), Univerzita J. E. Purkyně v Ústí nad Labem, ÚTŘV
  conference paper
  akce: Dynamika tuhých a deformovatelných těles 2005, Ústí nad Labem, 12.10.2005-13.10.2005
• DUNDÁLEK, R.:
  Virtual Engine in Ansys and Adams Environment,
  PERNER'S CONTACT 2004, pp.157-164, ISBN 80-7194-633-8, (2004), Univerzita Pardubice, Dopravní fakulta Jana Pernera
  conference paper
  akce: Perner's Contact 2004, Pardubice, 10.02.2004-11.02.2004

List of publications at Portal BUT

Abstracts of most important papers:

• DUNDÁLEK, R.:
  Plain Bearings in 5-cylinder In-line SI Engine,
  Dynamika tuhých a deformovatelných těles 2006 IV. mezinárodní konference. Sborník příspěvků, pp.41-46, ISBN 80-7044-782-6, (2006), Fakulta výrobních technologií a managementu UJEP Ústí n. L.
  conference paper
  akce: Dynamika tuhých a deformovatelných těles 2005, Ústí nad Labem, 12.10.2005-13.10.2005
  Hydrodynamic plain bearings are mostly used for crankshaft support in cylinder block of 4-stroke SI engines. The same is true for con-rod support on crankpin. Usage of plain bearings in combustion engines is allowed by force feed lubrication. Design of plain bearing enables formation of hydrodynamic lubrication film, which ensures low abrasion and high durability. This important mechanical point is also featured by restriction of ability of vibration transfer from crankshaft to engine block, which directly decreases noise radiated from engine. Main objective of lubrication is to detach two relatively moving parts by oil film, which thickness is higher than sum of surface roughness of both parts. Greatness of fluid friction is not in contradistinction to solid friction dependent on material quality of moving parts, but on oil properties such as its dynamic viscosity, velocity of motion, size of friction areas and minimal rest gap.
• DUNDÁLEK, R.:
  Behaviour of hydrodynamic bearings under various working conditions,
  Sborník abstraktů, pp.17-25, ISBN 80-213-1510-5, (2006), Česká zemědělská univerzita v Praze, Fakulta technická
  conference paper
  akce: KOKA 2006 - XXXVII. mezinárodní konference kateder a pracovišť spalovacích motorů českých a slovenských vysokých škol, Kostelec nad Černými lesy, 19.09.2006-20.09.2006
  Hydrodynamic plain bearings represent an important member in combustion engines. They influence key parameters of power train units such as durability, wear-out, vibrations and noise. Their behavior is described by Reynolds differential equation. This equation is solved for several bearing states (about 60 eccentricities and 60 misalignment angles) prior to the dynamic analysis. The results are stored in databases of non-dimensional reaction forces. The aim of endeavor is to implement topical design model of plain bearing into the complex calculation model of combustion engine called virtual engine. Virtual engine is created in multi-body system, which is suitable for kinematical and dynamic simulation of very difficult mechanisms. Rigid but first of all flexible parts are used. Subject of interest are plain bearings which can work under various working conditions such as different gas force, bearing clearance and oil viscosity. Effect of oil supply type on oil pressure and oil flow is also included. Influence of these parameters is monitored on main bearing trajectories and bearing load polar diagrams.
• DUNDÁLEK, R.:
  Elastohydrodynamické modely ložisek jako moduly virtuálního motoru
  dissertation
  xxx
• DUNDÁLEK, R.:
  Optimalizace vyvážení klikové hřídele pětiválcového motoru,
  FSI Junior konference 2005, (2006), Vysoké učení technické v Brně, Fakulta strojního inženýrství
  conference paper
  The paper deals with computational modelling of powertrain units. It was mentioned five variations of five cylinder inline SI engine crankshaft. Torsion vibration of crankshafts and crank mechanisms were "the order of the day". Torsion vibrations were investigated in revolution range 1200 - 6000 min^-1. Fourier transformation hepl to discover harmonic component of torsion vibration. Crankshafts were supplied on hydrodynamic plain bearings. Torsion spectrums, polar diagrams and trajectories of main bearing are illustrated in this paper too.