Rubber suspension bracket: In modern vehicle design, the engine is fitted with elastic support, which is called a "suspension bracket". Its basic functions are:

Fix and support the vehicle powertrain, withstand the reciprocating inertial forces and torques generated by the rotational and translational mass of the engine inside the powertrain, withstand all the power acting on the powertrain during the driving of the car, isolate the transmission of body vibrations to the powertrain caused by unevenness of the road surface and road surface impact on the wheels.

The ideal engine rubber mount should have low frequency, high stiffness and large damping to attenuate low-frequency high-amplitude vibrations generated by uneven air pressure on the road surface and low-frequency large amplitude vibrations when the engine is idling. In order to reduce the noise inside the car and improve the handling stability, it should have the characteristics of high frequency, small stiffness and damping. Therefore, rubber mounts are often required to have frequency change and amplitude change characteristics.

Commonly used rubber materials are: NR, SBR,IIR.