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NUMERICAL MODEL USING FINITE ELEMENT METHOD FOR FORCES AND ACCELERATION OF THE PISTON-CRANK MECHANISM AT THE ROTARY VALES D.I. DIESEL ENGINE


ZICHIL VALENTIN, PINTILIE GHEORGHE, SAVIN CARMEN, JUDELE ADRIAN
UNIVERSITY OF BACĂU

Issue:

MOCM, Number 9, Volume I

Section:

Issue No. 9 - Volume I (2003)

Abstract:

The authors has developed an engine friction model in order to determine the instantaneous friction components at any crank angle during the overall engine response. The main friction components are the piston assembly, the bearing, the valve train and the auxiliares. The model includes new analytically derived equations for the friction components of the rotary valves train, the ring assembly and the bearing with mixed lubrication. The model takes into consideration the effect of temperature variations on the viscosity of the oil. The friction equations are based on theoretical calculations for hydrodynamic and mixed lubrication. They rely on Reynolds equation and dvnamic analysis. Simulation results are presented, which compared with experimental data indicate an accuracy of more than 98 per cent.

Keywords:

rotary valves train, instantaneous engine friction, dynamic modelling, transient response.

Code [ID]:

MOCM200309V01S01A0023 [0000927]


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