Title: Simulation of a multi-cylinder engine vibrational behaviour

Authors: Daniela Siano; Roberto Citarella; Enrico Armentani

Addresses: Istituto Motori, CNR - Via Marconi, 4 Naples, Italy ' Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, SA, Italy ' Department of Chemical, Materials and Production Engineering, University of Naples Federico II, P.le V. Tecchio, 80, 80125 Naples, Italy

Abstract: This work analyses the vibrational behaviour of an in-line 4-cylinder, 4-stroke, internal combustion turbocharged direct injection gasoline engine. A multi-body numerical model of the engine is implemented, to simulate its dynamic response when running in a bench test. The cranktrain multi-body model is created using geometrical data extracted from engine CAD, using as excitation forces the experimentally measured in-cylinder pressure values. A flexible multi-body approach leverages on FEM modelling of crankshaft, cylinder block and head for the dynamic analysis, with remaining parts modelled as rigid. The engine mounts are modelled by flexible elements with given stiffness and damping. The importance of the explicit modelling of the rods connecting the engine with mounts is highlighted. The software Siemens-LMS Virtual Lab and ANSYS are used for the assessment.

Keywords: FEM; multi body simulation; vibration simulation; gasoline engine dynamics.

DOI: 10.1504/IJVNV.2018.095158

International Journal of Vehicle Noise and Vibration, 2018 Vol.14 No.2, pp.101 - 123

Received: 16 Feb 2017
Accepted: 12 Feb 2018
Published online: 01 Oct 2018 *

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