Shulou(Shulou.com)11/24 Report--

The record for the fastest acceleration of the King of Speed is set at 1.416 seconds.

It was not Tesla who set the acceleration record, but 20 students from the University of Stuttgart in Germany.

The GreenTeam, which they formed, built the all-electric car, code-named EO711, which they all handmade and tested at the Bosch Research Park in Reiningen, Germany.

With a zero-hundred acceleration of 1.416 seconds, it broke the Guinness World record held by the "Grimsel came" team for six years in 1.513 seconds, becoming the fastest electric vehicle in the world with zero-hundred acceleration, and completed the challenge in the cold afternoon.

Source: GreenTeam has repeatedly broken the acceleration record of electric vehicles at 0100km / h (62mph) since 2010, and the world record holder has been passing among European university teams.

For example, the annual transfer from one European university fleet to another European university team, from Germany, to the Netherlands, to Switzerland, is now once again regained by the German university team.

The Greenteam team, which weighs 145kg and has a maximum of 242hp, is made up of 20 students studying different subjects. Originally founded in 2009, they regularly participate in the "Formula students" international student design competition. In this competition, students are required to design and build an electronic car independently and evaluate it in various subjects such as acceleration and endurance.

As early as October 2009, they began to participate in the electric formula with the first generation of electric racing car E0711-1.

Source: GreenTeam and this is not the first time they have broken the Guinness Book of World Records. In the third year of the team's construction, in the summer of 2012, Green Team's second-generation car, the E0711-2, broke the Guinness World record for the acceleration time of the electric car 0~100km / h, with a score of 2.681s.

After a year, it was overtaken by Delft University of Technology in 2013.

In 2014, it was "Grimsel" from the Federal Institute of Technology Zurich / AMZ in Switzerland, setting the first world record of less than 2 seconds. In 2015, GreenTeam broke the Grimsel team's record again and regained the honor, but then in 2016, Grimsel won the championship again with a record of 1.513 seconds and held it for six years so far.

In order to complete this speed breakthrough, GreenTeam carried out a year-long preparatory work, but the process was not smooth.

They had planned to try to challenge the world record in July this year, but during acceleration, the car lost control and crashed into a fence made of tires at high speed. fortunately, the driver was not injured, but the vehicle was badly damaged and was forced to cancel the challenge.

Source: GreenTeam tried again in early September but was forced to cancel again the night before due to parts failure and technical problems, and finally conducted the test on September 23.

This time the world record is half a second faster than those mass-produced hyper car Pininfarina Battista, 0.6 seconds faster than Ariel Hipercar and 0.9 seconds faster than Tesla Model S Plaid, and even nearly a full second faster than Bugatti Chiron.

How could it be so fast?

Source: the GreenTeam is based on an internal combustion engine racing car from the local Stuttgart team. They replaced the four-cylinder internal combustion engine of the original car with a motor and optimized the structural design of the vehicle.

The Greenteam team capped the car's weight at 145kg (320lb), made almost entirely of lightweight carbon fiber. Driven by the high voltage battery pack developed by the school, the power of the motor has reached 180 kilowatts (242 horsepower).

Source: GreenTeam should know that this output power is less than half of the current highway electric supercar standard, but considering that the car weighs only 145kg (320lb), it exceeds the power-to-weight ratio of 1.24kW / kg (1.67hp / kg), achieving a horrendous 1:1 push-to-weight ratio.

The University of Stuttgart says the electric car can generate about every ton of 1726bhp, so the maximum peak acceleration can reach 2.5G, which is even more powerful than astronauts feel when they re-enter the Earth's atmosphere.

Source: University of Stuttgart for comparison, the acceleration speed of F1 cars is about 2G. It was this huge acceleration that helped the team's car break the previous record held by the Swiss AMZ racing team, which set a 1.513-second zero acceleration record for electric vehicles.

Diogo Silva, the driver of the racing car, said, "it's tiring, but it's a fascinating process and the result is worth everyone's effort."

They think record-breaking is addictive, and so is Green Team. In order to set a new record again, they kept improving their car and obviously they succeeded.

What is the practical significance of 02? Although, there are still many netizens complain that this record is not very practical.

Although the tram can achieve ultra-high performance, but in the back of the loss is range, performance and range is like a fish and a bear's paw, you can't have both.

In order to make the vehicle faster, the motor must have enough power, which is contrary to the general direction of reducing the energy consumption of the tram.

In the actual driving process, full acceleration is bound to quickly consume the power of livestock batteries, which is disadvantageous to ensure mileage, which is one of them.

Rapid acceleration will increase the average speed, while the higher average speed will make the vehicle produce higher wind resistance, resulting in higher power consumption.

Rapid acceleration will expose the motor to a denser current, and the coil will be exposed to high current for a long time before the acceleration is completed, raising the coil temperature and losing more power.

Source: GreenTeam can only carry one person in order to pursue extreme speed, and many necessary parts are omitted. This so-called highest record does not seem to have much possibility of mass production.

In fact, from the very beginning, the acceleration time of 100 kilometers is a major selling point of electric car companies.

The unique power output mode of electric vehicles determines that its initial acceleration is indeed better than that of fuel vehicles, but this can not be a breakthrough for tram companies to measure the internal combustion engine.

Of course, just as the German students above pursue the ultimate acceleration performance, they said when they broke the world record for the first time that they were trying to remove consumers' tinted glasses about the lack of power of electric cars.

Source: GreenTeam their results represent unlimited potential in the field of motors, so they don't take into account other aspects of cars, just like the role of F1 in fuel engines.

As a mass-produced car, for ordinary consumers, rather than professionals, acceleration performance is not the better the better, how fast 100 kilometers acceleration should not be used as a current tram marketing gimmick, too fast acceleration brings discomfort to drivers and long braking distance is not a small safety risk.

So balanced range and acceleration is the right solution. From the perspective of the vast majority of consumers' car purchase choices, it doesn't matter whether they have supercar-like acceleration, but their focus is range and safety.

However, for college students, participating in this kind of competition is far more important than commercial mass production.

In universities, we can not only obtain theoretical knowledge, but also put it into practice and put it into action, which is worthy of promotion and praise. This extreme speed sport also provides technical reference for FE events.

And with the development of electric cars, FE has gradually become a new top race. Unlike F1, FE also undertakes the task of promoting the technological progress of new energy vehicles and promoting sustainable development on the basis of speed and passion. BMW-Anderetti team leader Arnott once said bluntly to foreign media, "Electric cars are the future of cars, and FE is the beginning of this era."

This article is from the official account of Wechat: Chaodian Lab (ID:SuperEV-Lab), author: Wang Lei

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