Experimental Study of Engine Mount System's Vibration Characteristics

Abstract

NVH (noise, vibration and harshness) characteristics of modern vehicle are becoming more and more serious especially large power diesel engine. Various isolators are designed for engines as their mount systems’ isolation components. The study used two kinds of different isolator such as rubber isolator and metal-net isolator as a large power diesel engine's mount. Study and experiments were made. The static test showed that metal-net isolator has larger damping and can suppress impulse and resonance vibration effectively. The engine’s frame vibration comparison tests were also made on their control efficiency and vibration transfer rate. The signals were processed by means of MATLAB. The results indicated that the vibration transfer rate of the metal-net isolator is lower than that of the rubber isolator. The metal-net isolator has advantages over rubber isolator and can be used as diesel engine's mount component .