Optimization Technology of Power Plant Mounting System for Automobiles

摘要

Power plant mounts of automobiles need 1) to minimize shocks from the power plant when shifting and accelerating,rn2) to transmit minimum vibration to the body at idling, 3) to reduce road-induced body vibration, and 4) to transmitrnminimum engine and transmission noise. Up until now, no single method has been available to tune power plant mountsrnto cover these requirements.rnThis paper describes a method that optimizes the mounts which support a power plant of longitudinal layout in arnvehicle according to the center-of-gravity suspension theory for minimized vibration transmission in the low frequencyrnrange, which relates to requirements 1) to 3) mentioned above. To create this method, we have analyzed how the powerrnplant mounts transmit engine and road induced vibrations to the body and, based on the results, have developed arncalculation program and verified it though experiments. Utilizing this simulation program, we have formulated onernsingle set of equations to determine the optimal stiffness of the power plant mountings.