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A study of vibration isolation of engine mount system

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A study of vibration isolation of engine mount system

Wang, Ruiping (2004) A study of vibration isolation of engine mount system. Masters thesis, Concordia University.

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Abstract

The engine excitation forces, arising from gas pressure and unbalance force, are widely considered among the main vibration sources for the road vehicles. Even though the current engine mount designs are acceptable for vibration isolation of the transmitted forces from engine to chassis, the performance improvement of the engine mounting system is still required for the tendency of light weight and higher power of the vehicle. In this thesis, a coupled three degree-of-freedom engine mount system with both elastomeric and hydraulic mounts, are developed. The system performance is evaluated through simulation with the purpose of isolating the vibrations in entire frequency range and under engine excitation force. The engine dynamic model is established based on the analysis of the kinematics and dynamics of its components and gas variation. The unbalanced inertia force caused by engine reciprocating and rotating parts is derived as the vertical excitation force. The net torque, generated by the inertia forces and gas pressure, is formulated using geometrical relationship of the engine components. Two types of individual mounts, including a nonlinear elastomeric mount and a flexible chamber hydraulic mount, are selected from the reported work. The validation of their characteristics is implemented in a single degree-of-freedom (SDOF) system with the response carried out in the time and frequency domain.

Divisions:Concordia University > Faculty of Engineering and Computer Science > Mechanical and Industrial Engineering
Item Type:Thesis (Masters)
Authors:Wang, Ruiping
Pagination:xv, 165, [1] leaves : ill. ; 29 cm.
Institution:Concordia University
Degree Name:M.A. Sc.
Program:Mechanical and Industrial Engineering
Date:2004
Thesis Supervisor(s):Rakheja, Subhash and Hong, Henry
ID Code:8627
Deposited By:Concordia University Libraries
Deposited On:18 Aug 2011 14:30
Last Modified:18 Aug 2011 14:30
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