LIFE E-VIA - Electric Vehicle noIse control by Assessment andoptimisation of tyre/road interaction(LIFE18 ENV/IT/000201-LIFE E-VIA) (original) (raw)
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Romanian Journal of Transport Infrastructure
In both the current and foreseen context of significant development of the electric vehicle (EV) fleet, a future increasing ratio of EVs in the urban traffic is expected, still enhanced in low-emission zones involving bans or restricted access to other vehicles. EVs are known to be quieter than conventional vehicles at low speed because of a low motor noise emission, resulting in a higher prevalence of rolling noise in the environmental noise. EVs differ from conventional vehicles in several parameters that can influence tyre/road noise, like weight and torque. The LIFE E-VIA project objectives consist in developing, implementing and assessing a low-noise road surface for light EV traffic in urban conditions, optimised from an acoustical and life cycle perspective. In parallel, an optimisation of EV tyres is investigated. Prior to forthcoming layout in Florence (Italy) for assessment under real traffic conditions, a prototypal road surface has been implemented and evaluated on a tes...
Noise Generated by Tyres Designed for Electric Vehicles-Results of Laboratory Experiments
2015
A few years ago, electric and hybrid vehicles were rarely seen on public roads and were considered more as exotic curiosities or even as a sign of extravagance than a practical means of transport. Nowadays the situation has changed significantly. This was caused both by the technical development and legislative actions, as well as the organizational nature promoting the purchase and use of low-emission vehicles. Electric vehicles have a completely different sound emission characteristics than conventional cars. At low speeds, the electric and hybrid vehicles driven in electric mode are almost noiseless. Ironically, the noise levels of electric vehicles are so low, that they constitute a safety threat as cars approach pedestrians without audible warning noise. In the USA, the legislative work is in progress to introduce obligatory fitting of electric vehicles with devices emitting warning sound when moving at speeds below 30 km/h. Technical development of electric vehicles has create...