Reduction of Engine Shake Based on Energy Transmissibility Control

Abstract

This paper presents a method using energy transmissibility to discuss the vibration frequency-averaged response of a 2-DOF system. First, it is shown that the response of a simple 2-DOF vibration system composed of two masses and two springs can be simply predicted from the formula of the energy transmissibility. Next, previous studies on engine shake reduction are presented and the measures to reduce the shake response are reviewed, which measures are considering the coupling of bouncing and pitching motions and the employment of the hydraulic engine mount which are equivalent to dynamic dampers. It is then shown that these measures can also be derived in terms of the energy transmissibility. Finally, we argue that the energy transmissibility is useful for understanding vibration phenomena, designing vibration response, and enhancing new ideas for vibration response reduction.