There is a situation where both fuel vehicles and electric vehicles will "brake failure", do you believe it?
Two days ago, Tesla had a double-whining accident, an "old aunt" with a driving experience of 30 years crashed four cars in a row in the airport second high Model 3 "brake failure", including an unlicensed tank 300 pure new car, which successfully became a "beautiful car" in the hands of car dealers after being knocked twice.
Fortunately, this Model 3 withstood the impact of 170 miles, and fortunately people are fine. Here first of all to everyone to popularize a little knowledge, 170 miles is not equal to 170km / h, in fact, 1 mile = 1 mile / hour = 1.609344 km / h, direct conversion of the "aunt" to 170 miles converted into speed is about 273km / h, this is not in the prick, is to popularize a knowledge point with you. (It is estimated that most people think that the mile is km/h because of the phrase "speed 70 miles")
How is it Tesla again?
In fact, this so-called "brake failure" accident is not only Tesla, in fact, "Wei Xiaoli" has also been on the news, and although other brands have similar accidents, many people may not have heard of it. This is mainly because Tesla's popularity is too high, as the leader of electric vehicles and the best-selling electric vehicle, Tesla's every move can be described as "special care" by the media and even peers, especially accidents caused by such "defects" can attract people's attention. Generally speaking, as long as we see similar accidents in Tesla, we basically lock in the hot search. So, instead of asking "How is it Tesla again", it is better to ask "How is it an electric car again"?
How is it an electric car again?
At present, most of the accidents of "brake failure" in electric vehicles have been investigated and found to be related to the single-pedal mode, which is the "skill" that fuel vehicles do not have. Single pedal mode can be said to be a configuration that changes your driving habits, the original need for two pedals to complete the acceleration and deceleration in the single pedal mode one pedal can be completed, not only save time and effort can also extend the endurance, but it is not used to it will indeed be more likely to occur danger.
The single pedal mode is actually contrary to the situation we learn at the driving school, what we learn in the driving school is to put the brake pedal at any time when the foot does not step on the accelerator, which is actually to deal with unexpected situations at any time. And when we use the single pedal mode after the foot will always be on the accelerator pedal, in the event of an emergency even experienced old drivers may not be able to react, for the driver who is not very experienced may be completely panicked, subconsciously step on the accelerator pedal, and can not control themselves. This is also why we have seen many accidents in which the vehicle did not stop after the first collision, but continued to crash forward into other vehicles, and even in some accident videos we can see that the accident vehicle continues to accelerate.
If it's so dangerous, why not cancel the single pedal mode? For electric vehicles, the single pedal mode can recover a lot of energy for the kinetic energy recovery system, thereby extending the endurance to a certain extent, which is still very necessary now, and when you are skilled in using the single pedal mode, you will find that it is really easy to open, and this function can be said to be a must for new energy models. Therefore, in order to ensure safety, personal suggestions should be "grasped from the doll", for the new energy model driving school should be trained and assessed to a certain extent, while strengthening the driver's training for handling emergencies.
Is the electric car a brake or not?
Although many electric vehicle "brake failure" accidents are due to the oolong of the single pedal, I believe that many people are also concerned about whether the brakes of electric vehicles are not working. In fact, the brakes of electric vehicles and the braking system of fuel vehicles are not much different, they are made up of a combination of brake discs and brake calipers, and the brake pedal is completed by the driver's control brake pedal. But thanks to the "magical" kinetic energy recovery system, electric vehicles have two different forms of braking.
Electric vehicles use the electric control dynamic system through the torque generated by the gear mechanism motor into hydraulic pressure to achieve braking, but also through decoupling to maximize the recovery of braking energy, increase the vehicle mileage, which is the kinetic energy recovery system we mentioned above, also known as electric braking. The advantage of electric braking is that it can recover energy, but the disadvantage is that due to the complexity of the mechanical structure, there may be certain problems, such as some models in some working conditions will prompt the situation that kinetic energy recovery is not available, plus the braking process is not as decisive as mechanical braking, so the current best use environment is still auxiliary braking.
In terms of mechanical braking, electric vehicles and fuel vehicles are not much different, and the unexpected thing is that Volkswagen's ID series uses the braking form of front disc brake and rear drum brake, which is also based on the reason that electric vehicles have kinetic energy recovery to share the brakes. However, it should be noted that electric vehicles need to carry batteries, self-importance is heavier than the same size of fuel vehicles, so in the brake configuration, even if it is "on the same running line" as the fuel vehicle, it will be longer in the braking distance, which is why many electric models have begun to use high-end brand brakes.
In addition, another reason why electric vehicles are mistaken for being unable to brake is that because the characteristics of the electric motor reach a higher torque at the beginning, the vehicle accelerates too fast, and it is too late to step on the brakes when we react, so this is not that it cannot be braked, but that the speed is not well driven.
In this case, electric vehicles and fuel vehicles will "brake failure"
The braking characteristics of electric vehicles will be different from those of fuel vehicles, but as long as the brake system is not faulty, there will generally be no "brake failure" accident (the reason for the brake failure accident of some models may be because the brake booster pump fails). However, in the face of the following situation, whether it is an electric vehicle or a fuel vehicle, there may be an accident of brake failure.
In some basements with epoxy floors, if there is water on the ground, if the speed is too fast, even fuel vehicles will slip, and the skidding of electric vehicles with greater self-weight will be more obvious. In this case, it is not the brake failure, but when the brake has been stepped on, the tire and the ground continue to move forward due to the weakening of friction, so you must pay attention to slow travel when you encounter the basement of the epoxy floor.
It can be seen that in addition to real mechanical failures, some accidents are caused by improper operation by the driver. However, due to the more complex braking structure of electric vehicles, while the self-weight is larger, the electric vehicle is different from the fuel vehicle in the braking process, which is also what the driver needs to adapt, especially the single pedal mode, or it is recommended that everyone use it after skilled driving and being able to cope with emergencies.
GeekChoice original article