A Hybrid Electromechanical Engine Mount Design

A hybrid electromechanical engine mount design is proposed. The traditional single pumper hydraulic engine mount design consists of two fluid chambers, an inertia track connecting the two chambers, and a working fluid. In the engine mount design in this chapter, the fluid is completely removed and replaced with electronics. The new engine mount design consists of an elastomeric mount, a rack and a pinion, a torsional rubber mount, and a rotary voice coil. The rotary voice coil is connected to an RLC circuit with a variable capacitance. The electronics are used to vary the location of the notch frequency, when desired. Equations of the motion for this hybrid electromechanical engine mount design are derived using the bond graph modelling technique. Simulation results clearly indicate that the proposed engine mount design concept is feasible when mount input displacements are small. In this new engine mount design, the notch frequency can be varied using a variable capacitance.