Development and analysis of a simplified nonlinear model of a hydraulic engine mount

Abstract: This paper concerns nonlinear modeling of a hydraulic engine mount, focusing on the decoupler action. The proposed model is a simple nonlinear function, which describes the flow resistance in terms of the decoupler plate displacement and speed. The flow resistance using this model increases dramatically as the decoupler plate approaches the top or bottom of the decoupler cage. The advantage of the proposed model over the existing ones is its simplicity. Numerical simulation results show the behavior of the model to be realistic. Approximate closed form solutions have been obtained for the system using the multiple scale perturbation method. Perturbation provides a solution for the mount response at resonance. These results match the intuitive and experimental results available in the literature