Monday, March 14, 2011

Electric car: problems with low noise

The silence or the noise of electric cars can be a problem for vehicle manufacturers, as well as pedestrians and other vehicles. In the United Kingdom, for example, Nissan was forced to remove its zero-emission vehicles that sound device that is activated when reverse gear is engaged. All of the Leaf, which are being launched in the country of Albion will be in place.

Across the Atlantic, the Hyundai was forced to postpone the debut of its U.S. Sonata Hybrid in the streets so they can remove that command that allows those behind the wheel of virtual noise off the engine when the vehicle shifts in electric mode, namely at a speed below 20 km / h. In practice, the noise is there and must be so.

In reality, the artificial sounds of vehicles with battery-powered engine are theoretically outlawed in Great Britain between 23 and 6 am, because in that time frame is (or should) be completely silent, except for the normal engine noise combustion and for emergency vehicles. In the U.S., things change and not just because the vehicles keep to the right: those electrical and ibrididevono emit a sound that warns when they proceed without the presence of the aforementioned 20 km / h.

The confederation, the community of blind people pressed for this speed limit is raised. The amazing thing is that General Motors has spent 18 months to ensure that its whisper quiet Ampera issue a virtual sound while driving, having spent billions of dollars to develop an electric motor that does not emit CO2 as well as not to disturb the eardrums.

For this reason, the engineers hired by the Detroit House indulged creating false rumors of internal combustion engines, different shades of sound of the trumpet and even a mock collar cow bells, as if on some tranquil alpine pastures.

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