United States requires major electric car manufacturers must install noise devices

(Baidu) In the past few years, the U.S. regulators have been devoting themselves to studying and promulgating policies and regulations that can regulate the issue of too-quiet electric vehicles. In their original mind, electric vehicle manufacturers must install equipment for automobiles Make sure you hear audible noise to alert pedestrians when driving at speeds below 19 mph.

According to the plan, the U.S. regulatory authorities will require the major manufacturers of electric vehicles to install the equipment as soon as next year, which means that only one year or so of car ownership left to consider for coping strategies.

The new government of the United States government triggered a lot of controversy in the field of electric vehicles. The vast majority of car prices believe that at low speeds the electric car is too quiet indeed there are some problems, especially for those poor eyesight pedestrians. People are also worried that if you want to increase the noise of electric vehicles, then it will undoubtedly make electric cars one of the major advantages and selling points lost.

Although the biggest advantage of a pure electric vehicle is that it will not pollute the environment, it is undeniable that there is very little noise pollution in electric vehicles, especially in the cities.

Once the speed increases, the tire noise will exceed the engine noise, at this point, the electric car and the traditional car is no different. However, when the speed is reduced, the electric car is very quiet, pedestrians are hardly aware of the arrival of the electric car.

It is understood that since 2013, U.S. regulators began to study the issue of driving sound of electric vehicles when the U.S. Highway Safety Administration (NHTSA) had predicted that the number of pedestrian traffic accidents caused by electric vehicles or hybrid vehicles 19% more than traditional cars. The initial prediction by the United States authorities is that after the introduction of this new regulation, it is estimated that the number of pedestrians and cyclists per annum can be reduced by 2,800. However, the latest forecast revised this target to 2,400.

In the meantime, the draft rules drafted in 2016 have shown that electric car makers will not need to install this equipment for their electric cars in the coming three years.

After Trump assumed office, the U.S. Department of Transportation (DOT) reviewed the terms of the rule and confirmed to Cheqi this week that the new noise equipment could be installed by 2020.

solution

It is understood that car manufacturers must install at least one external sound device on their electric car or hybrid car, making it possible for pedestrians to realize that an electric car is passing as the car is running at low speed. Tesla, an electric car maker, seems to be thinking of alternatives, but it's not yet known if it will work under the new rules of the U.S. government.

In a Q & A session in 2013, Elon Musk, chief executive of Tesla, responded to a concern about a Tesla owner who had not heard of a low-speed electric car approaching What should I do? Elon· Musk replied: If the Model S sound also have some problems, it is clear that the crux of the problem is how to avoid noise pollution at the same time.

ElonMusk went on to say that "we are discussing with regulators on this issue," and he was interrupted by someone in the crowd when it was not yet done. He did not realize that there were already two different voices about the issue .

ElonMusk added: "I think in the long run the idealized state is to install a proximity sensor that emits an acceptable pleasurable sound directly in front of the pedestrian, so this will minimize noise It will be the best solution I can come up with without causing any objectionable people. "

ElonMusk went on to say: "I am a bit worried about whether this can meet the requirements of the U.S. authorities, but hopefully this will eventually be a good solution."

This is Tesla's position in 2013, but in fact Tesla has been researching this issue since 2016. Below is a chart of Tesla's internal charts showing that Tesla does Think about how to install this "reminder pedestrian" sound device.

Making a sound is only part of the question. ElonMusk has said that first of all, the car must first perceive pedestrians in front to make a sound reminder. Tesla's Enhanced Autopilot sensor and 360-degree camera help the car detect pedestrians. But for Elon nowMusk also needs to consider how to install new pedestrian reminders and sensors.

Solutions must take into account safety while reducing noise pollution and achieving the best of both worlds. However, it is unknown at this time whether this solution will work under the new rules of the U.S. authorities.