车 讯 网 report ] I think that the 2021 Shanghai Auto Show is the biggest highlight, it is the main rights of Tesra owners. This thing is so fascinated, and the rights party and the manufacturers are very tough. Each trick, here, let them be in the side, simply discuss the brake system, see if it will not really fail .
Opened the cabin cover of any car or tram, in the upper right corner, you can see a white plastic can, and the tank is brakes.
The brake liquid storage tank is below the brake master cylinder (the vernal is usually the brake head pump), and the black circular metal body is vacuum. Booster. 
If this set is removed, it is the picture shown in the picture, mdash; brake pedal in the carriage, the vacuum booster in the chamber, The brake master cylinder is integrated.
Whenever the driver steps on the brake pedal, with the help of the vacuum booster, push the piston in the brake master, thereby generating pressure mdash; mdash; brake master tank is a bit like a hospital The syringe, the latter is injected into the human body by pressure, and the former is braked by pressure. Among them, the vacuum booster works from the negative pressure in the engine intake pipe. 
As early as possible, from the brake pipe drawn from the brake master cylinder, directly leading to the brake wheel tank at the wheel (the vernacular is usually a brake pump). In order to ensure safety, the brake master cylinder is composed of 2 pistons, and the output is also 2, which is usually a left front wheel and the right rear wheel, and the other is responsible for the right front wheel and the left rear wheel, which is cross-shaped. That is, there are 2 completely independent brake systems, in case a certain road, there is another way to stop the car.
Later, brake anti-lock (ABS) appeared, between the brake master and the brake wheel cylinder, increasing a hydraulic regulator to ensure During the braking process, all wheels are in a rolling state, thereby bringing safety MDash; mdash; some people thinkDynamic anti-lock is to shorten the brake distance, is not. Under certain specific premise, the anti-lock does not shorten the brake distance, but it is mainly to reduce the slip rate of the car and avoid failure. Before the appearance of anti-lock, experienced drivers on the slippery road, mostly using ldquo; This mode of operation is the same as the principle of braking anti-lock, but only one person, one by machine.
Later, on the basis of braking anti-lock, the body stability control occurs, not only to achieve anti-lock, but also brake to a wheel, thereby ensuring the stability of driving. This system is called ESP in Bosch, called DSC in BMW, Toyota called VSC Honda called VSA. Regardless of the products, the input is from the brake master, and the output is 4 pipes, and the four wheels are directed to 4 wheels.
The brake line came to the wheel, and there is a brake wheel cylinder, and the brake piece is rubbed with the brake disc, thereby Produce brake. The first picture below is disc braking, relying on ldquo; clip rdquo; generating friction; second sheet is drum brake, relying on ldquo; rising rDQUO; generating friction.
After inventory of the basic structure of the brake system, then take a look at the electronic braking today. 
Through the foremost LDQUO; Tesla brake door rdquo; incident, I found that some people mistakenly thought that Tesla was very advanced in this area, think it was unique in the brain, It’s different from the people. Actually, not the case. Within I know, its brake system is Bosch’s iBooster, this product relies on electric power, not the vacuum boost mentioned before. The system is not only applied to electric vehicles, but also applies to fuel vehicles. For example, the new generation of Dongfeng Honda, which is listed in 2017, is it.
In fact, in the past years, fuel gifelings have been developing towards electronics, such as electrospotting, electronic steering, driving assistance, automatic driving, and so on. That is to say, electronics and intelligence are not a unique label of electric vehicles. 
Bosch’s iBooster, the biggest difference in hardware, is the vacuum booster, replaced by electronic booster.
The product has already appeared 2 generations. The first generation of products was born in 2013, and it can be seen from the figure below that it drives a locator that is a bit like a worm gear, producing boost.
The second generation of products was born in 2017, and the implementation agency has changed and is said to be higher efficient. By the way, in order to produce this product in our country, Bosch has established a new plant in Nanjing, which has been put into production in 2019.
The working process of the electronic booster is mdash; mdash; the driver steps on the brake pedal, the sensor obtains signal, and the signal is processed, the motor is transmitted, the motor works, Produce boost.
Of course, this is only the simplest description, with a lot of signal processing content, such as the ability to calculate how much boosting according to the situation. Of course, it is not designed to replace vacuum booster, real value is to adapt to new things, such as energy recovery, driving assistance, automatic driving, and so on.
However, regardless of how the electronics develop, there is a basic bottom line that cannot break the mdash; mdash; automotive brakes, there must be a considerable insurance factor.
In fact, Bosch’s electronic boost has level 2 protection. If the electronic power is invalid, the level 1 protection is built by ESP, producing braking; level 2 is hydraulic by pure machinery. That is to say, if the electronic boost is simultaneously invalid at the same time, it is simply stepping on the brake pedal with the driver, so it can stop the car. In this regard, when Bosch introduced new products in the past few years, it has emphasized.
So, in LDQUO; Tesla brake gate RDQUO; incident, some people believe that Tesla’s technology is very prosode, its brake pedal does not directly generate braking, completely relying on machine to complete MDash; MDASH; Obviously, this is not a fact. 
However, in the case of loss of power, the driver is required to force the pedal, driving the insufficient driving experience, or if the driving sitting is not suitable, and mistakenly thinks that LDQUO; brake failure RDQUO ;.
In summary, I guess, Tesla’s ldquo; brakes failing RDQUO;, it is very likely that the signal has a problem, causing the motor to not work, can’t produce boost The pedal becomes very hard, so that the driver is mistaken for ldquo; the brakes fail RDQUO ;.
The above speculation is accurate, and afterward detection, it is estimated that it will not be gone. Because hardware is no problem, just a moving signal error, and this occasional fault is the most difficult to find. Just like an electrocardiogram, when you don’t leave, even if you do it, you can’t see it.
I feel that some people like the myths, it seems that it is most advanced. In fact, the most basic part of the vehicle is not its strength, there is nothing unique in technology; mdash; it is a company with scientific and technologically long companies, the car manufacturing is a genuine new hand, the qualifications are not in Chery, BYD ,auspicious. 
In fact, regardless of the above-mentioned electronics boost, or more intelligent LDQUO; intelligent integrated brake system RDQUO; (referred to as IPB, see below), it will electronic booster, brake master cylinder, body stable Control is integrated, has a small size and more functional advantages, although the electronization is higher, the most basic mechanical hydraulic pressure is still present. Just said, this is the bottom line of automobile braking, it is not to break through. Currently, this system has been applied no matter what the energetic car of BYD is still in Cadillac.
Finally, the so-called LDQUO; single pedal RDQUO;
According to a US researcher’s data, Tesla appeared in LDQUO; brakes failing RDQUO; and may have a driver’s reasons, or it may be too paymentEnergy recovery factors. Tesla really likes to be new and easy, such as the so-called single pedal mode, the original intention may be good, but it should be appropriate, especially the driver should have the right to choose.
I have tested 3 Tesla, the last time, and found that energy recycling was canceled. Since I am driving a fuel truck, I am used to control the speed of the throttle, and the frequency of the brake pedal is far below the vast majority of people, so it is very suitable for Tesla’s design. But I think this design, Tesla, I am afraid I owe Mdash; mdash; how much is related to it for hundreds of accidents, I don’t know, but I think there will be some relationships. 
Tesla is so designed, there must be its truth, but also take care of people’s habits and the next consciousness.
In fact, energy recovery is any electric vehicle, mixed cars have, at some time, it is really advantageous. For example, those who choose the energy recycled, design in the steering wheel, allow the driver to make full use of it to reduce the frequency of the brake pedal. 
So, I think Tesla should return the option to the driver, rather than doing the driver. After all, people live.