Engine mount system should meet two seemingly conflicting requirements; soft enough to efficiently isolate the vibration transmitted from engine to frame and stiff enough to reduce the engine movement and to maintain the durability. In this study, a hydraulic engine mount, recently developed to meet both requirements, is investigated so as to examine its dynamic property and function. Experiments are performed to look into the dynamic characteristics with varying four important factors such as temperature, preload, amplitude and loading direction. Taguchi method is adopted for the systematic planning of experiment and analysis. In addition, a two DOF model for the hydraulic engine mount is formulated and the model parameters are identified using the experimental results. Based on the identified model, an effective design procedure of hydraulic engine mount is also proposed.
