Natural rubber (NR) is widely used in powertrain mount applications in an internal combustion engine (ICE) and electric vehicle (EV) for its superior mechanical properties. Polyurethane (PU) is generally used as a bump stopper application under suspension in passenger cars for better ride and handling management due to its soft entry and better durability for its compressible behaviour. However, polyurethane application is gradually adopted in electric vehicle powertrain mounting systems where the specific dynamic properties are used to control the transfer of high motor torque reaction force during sudden acceleration. In this paper, properties like dynamic stiffness, creep, the durability of NR and PU are compared for application in powertrain mounting in the electric vehicle. The dynamic stiffness at low and high amplitude is discussed for both materials. The overall noise, vibration and harshness (NVH) and durability benefit of PU material in electric vehicle application are discussed in this paper.
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Hazra et al. (2022) studied this question.
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