The constantly increasing fossil fuel prices, the need to reduce transport-generated CO2emissions and traffic noise and the striving to improve urban air quality have promptedthe automotive industry to focus efforts on development of fuel efficient vehicletechnologies. Amongst these technologies the development of Electric Vehicles (EVs) andHybrid Electric Vehicles (HEVs) is considered as most promising in solving both theeconomic and ecological concerns. To be competitive such vehicles must have anacceptable Noise, Vibration and Harshness (NVH) behaviour, not only inside the vehicle,but also outside with the requirement to guarantee safety of weaker road users such astwo-wheelers and pedestrians. Most of the NVH design and problem-solving knowledgegathered since many years has concentrated on internal combustion vehicles and so thereis a need to develop novel analysis techniques for vehicles with these new drives. It issignificant that after many years spent in reducing noise one big challenge is now becomethe generation of sound by vehicles.
展开▼
