Measurement of noise from electrical vehicles and internal combustion engine vehicles under urban driving conditions
Regular paper
Danish Road Directorate
Wednesday 3 june, 2015, 10:40 - 11:00
0.2 Berlin (90)
Abstract:
As part of the electormobility+ project COMPETT controlled pass by (CPB) noise
measurement where carried out in 2014. This was done in order to investigate
differences in pass by noise from electrical vehicles (EV) and internal
combustion engine vehicles (ICE) under urban driving conditions. The
measurements where done on two EV’s and two similar ICE’s.
The measurements were done with an electrical and an ordinary Citroën Berlingo
and a Nissan Leaf and a VW Golf Variant. The Citroën’s and the Nissan was lent
by the dealer while the VW is one of the cars in the fleet of the Danish Road
Directorate. The tires on the electrical Berlingo were Michelin Agiglis the
other cars were supplied with Michelin Energy saver.
The urban driving conditions investigated was steady driving at 10, 20, 30, 40,
50 and 60 km/h, deceleration by engine breaking from 60, 50, 40, 30 and 20 km/h
and acceleration at various degrees. These measurements should make it possible
to investigate the noise levels from EV’s and ICE’s at diving conditions such
as: coming up to and going away from a crossing, diving along at steady state in
parking lots, on open streets and in streets with low speed restriction etc.
The study shows that at low speeds in decelerating by engine breaking and steady
driving the Ev’s emits about 5 dB less noise than ICE’s, but at speeds above 30
km/h the noise levels from EV’s and similar ICE’s are similar as well.