Why do the front wheels have the deepest marks when the car brakes urgently?

There are two types of situations:1For vehicles with ABS anti-lock braking system, as long as the braking system is normal and the passengers are normal, the brake marks of the four wheels on the flat and dry ground are generally relatively uniform and the imprint is shallow; In the same case, if the ABS indicator light of the instrument is always on, and one of the wheel brake marks is deep, it means that the wheel sensor or circuit is faulty; 2.

In the case of emergency braking, the brake mark of the vehicle without anti-lock braking system will be different because it is impossible to have the same braking effect of four or more wheels, and it has a lot to do with the load weight of the vehicle.

Generally, cars are front-wheel drive, and when braking, they are also front-wheel brakes. Because the center of gravity of the car is forward, the load of the front wheel suspension system, so the ratio of the bearing mass of the front wheel suspension system to the non-bearing mass is greater than that of the rear wheel, so when the emergency braking, the front wheel brake marks are large.

It is also related to the model, vehicle condition, on-board weight distribution, brake design, etc. Generally, it will not be the same, only one is relatively deep, so that the stability of the car is good.

If it is fully loaded or overloaded, the rear wheels will be assigned greater braking force to the rear wheels under the action of the brake load proportional valve, which is not easy to say at this time, and the rear wheels may be deep.

In short, if the rear wheel is deeply printed during light load, it means that the rear brake needs to be loosened, or the front brake needs to be tightened.

The principle of ABS anti-lock braking system is learned in physics: the maximum static friction is greater than the dynamic friction. To put it simply, the moment when the tire is about to slide, the friction between the tire and the ground is the greatest.

If you do not use the ABS system, the tires will be braked directly, and the tires will slide on the ground, and the friction will decrease (dynamic friction), and some tires will be seriously damaged (the friction will continue to decrease, and the braking effect will be reduced). With ABS, you can constantly switch between rolling and locking, so that the tire can maintain maximum static friction as much as possible, and the anti-skid part of the tire can give full play to its effect.

If the car stops abruptly during emergency braking, what will happen to you? In order to prevent the car from tipping over, ABS will try its best to loosen the wheels (which is the so-called maximum braking force) at the same time as braking (so that it can still have a steering function) and not lock it, so that the car can stop quickly and ensure that it does not tip over.

The wheel print of the front wheel is deeper, and in the process of braking, the weight is transferred to the front wheel, resulting in greater friction of the front wheel, and generally speaking, the braking force of the front wheel is greater.

1. When the car brakes, the center of gravity of the car will move forward due to inertia; 2. In addition, the front wheel load of the car is generally heavier than the rear wheel, because the engine and other major components are almost all loaded through the front wheel. At the same time, the center of gravity is relatively close to the front wheels.

Generally, the front-wheel drive is followed by the rear wheels, so the front-wheel car has deep marks.

Because as soon as the brakes are braked, the car will form inertia, and there are also factors affecting gravity.

Because the front wheels receive the force for a little longer.

The car is driven by gravity, and there is inertia due to gravity.

Due to inertia, the brakes of the car will kick forward.

Let's see what kind of tires drive it, some are front wheels, some are rear wheels.

The main thing about braking is to brake on the front wheels.

In fact, some cars now have the deepest traces of the front wheels when braking suddenly, depending on the performance and design of the car.

When the car is moving, the friction between the wheels and the ground is a special problem, which can hinder the driving of the car and help the movement of the car. The problem is in **. You asked how friction stops the car, so you answered the question first.

When the car wants to stop, the wheels are locked with the foot system to stop the vehicle from turning, and the wheels will slide on the ground, and when the two objects (solids) slide against each other, friction will be generated and the car will stop. But why do we also say that the friction between the wheels and the ground is caused when the car accelerates and steers, and what is the difference between the two? The biggest difference is that the vehicle does not rotate when parked, but the wheels turn when the car accelerates and requires friction to propulse.

When braking, the wheel does not rotate, there is a point of contact between the wheel and the ground, which slides on the ground and causes friction with the ground, according to the angle of the work w = f s w = work, f = friction, s = distance of sliding. The negative sign is because the frictional force and the displacement are in opposite directions, so this work is a negative work, which will reduce the energy of the object and make the car stop by motion. If the car brakes sharply in an accident.

This friction can turn the kinetic energy of the car into a large amount of heat energy, producing high temperature, which can melt the rubber of the wheel part, so that the ground will produce long vehicle marks, and there will be some burnt glue smell. But the situation is different when the car accelerates, the wheels rotate in the world, and the wheels do not touch the ground for a long time at the same point, if you have the opportunity to read Al Physics, you can see that the contact point between the wheels and the ground is instantaneous and stationary. According to the angle of the work w = f s but s = 0 so w = 0, so a force can be generated (the wheel turns backwards, a backward force is generated on the ground, and the ground has a forward force to push the car), and the energy consumed is only very small when rubbing against the ground.

Reference: yahoo

If the car is in an accident and brakes suddenly. This friction can turn the kinetic energy of the car into a large amount of heat energy, producing high temperature, which can melt the rubber of the wheel part, so that the ground will produce long vehicle marks, and there will be some burnt glue smell.

Reference: me

Big momentum! SO there will be brake marks when braking hard.

Summary. Hello, I am your exclusive technician, attentive, careful, dedicated to answering your car questions, for you to find the corresponding problem solutions and solutions! There is no brake drag mark on the front wheel of the vehicle emergency braking, if the vehicle does not have ABS anti-lock braking system, there is no pallet mark is normal, in the case of emergency braking, the vehicle does not deviate, flick the tail, etc., it means that the braking system is normal, there is no problem, if the right front wheel does not brake or brake problems, there will be brake deviation or tail flicking, there is no brake brake drag, which may be caused by different degrees of road or tire wear.

There are no brake marks on the front right wheel emergency braking, is the brake broken?

Hello, I have seen your inquiry, please wait for a moment and answer it for you immediately.

Hello, I am your exclusive technician, attentive, careful, dedicated to answering your car questions, for you to find the corresponding problem solutions and solutions! There is no brake drag mark on the front wheel of the vehicle emergency braking, if the car does not have ABS anti-lock braking system, no pallet is normal, in the case of my emergency braking, the vehicle does not deviate, flick the tail, etc., it means that the braking system is normal, there is no problem, if the right front wheel does not have a brake or brake height This curve has a problem, then there will be a brake deviation or tail flicking, there is no brake brake drag, which may be caused by different degrees of road or tire wear.

The foot brake of the car controls four wheels, so the safety factor is much greater than that of controlling two wheels! But the handbrake is used to stop the car from sliding easily! So it's the one that controls the two wheels (two rear wheels)!

Because if you don't brake all of them, it will lead to problems such as directional deviation. Take a look at the theory.

Sure the foot brake is a four-wheel brake together, the first brake and then the wheel will pull the belt, and the first brake will tie the front wheel.

The automobile braking system is also known as the automobile braking system. The function of the braking system is: to make the moving car force to slow down or even stop according to the driver's requirements; Stable parking of stopped cars in various road conditions, including on ramps; Keep the speed of the car going downhill steady.

At present, domestic automobile manufacturers use more drum brake system for the front disc and rear drum brake system on small and medium-sized finished commercial vehicles, and some models are four-wheel disc brakes, compared with drum brakes, disc brakes are more advanced in technology, lighter in quality, and have better heat dissipation performance, braking performance and adaptability to complex weather and road conditions.

In fact, when braking, the rear wheels brake before the front wheels.

The front wheel of the car brake is greater than the rear wheel, the engine is in the front, the front part of the car is heavy, and the brake disc is generally a ventilated disc in front.

Because the car brakes will occur forward, all the weight of 2 3 pressed on the front wheel, the steering wheel will become very heavy, when the corner needs to play the direction, it will be very laborious, plus the vehicle leans forward, the grip of the rear wheel will become smaller, these two factors will cause traffic accidents, so, the rear wheel brake of the truck needs to be better than the front wheel, because the car is lightweight, fast, the front wheel brake is good, will shorten the braking distance.

When the wheel forward speed suddenly decreases during emergency braking, the car will continue to slide forward, and the people and objects in the car will also lean forward, and the overall center of gravity of the car will move forward, so that the pressure of the front wheel on the ground increases, so that the friction between the front wheel and the ground becomes larger

The black brake marks left by the tires on the concrete floor are formed by overcoming friction, so the brake marks of the front wheels are darker

A very important component in the brake disc braking system, a good brake disc brakes stably, no noise, no shaking. Many DIY players don't have a certain amount of professional knowledge and don't just replace the brake disc by themselves, because the original brake disc has been tested by many professional engineers and can fully withstand the braking force of their own car. Sometimes, after replacing the perforated and scribing brake disc, the braking effect may not necessarily be better than the original ordinary disc.

Therefore, when it comes to safety, the total parts and components also need to be cautious when modifying.

The inertia action is too great, so the front wheels have deep car marks.

When the car brakes, it leans forward, the steering wheel becomes very heavy, and the car marks are deep.

Because the front wheels of the trolley are heavy. In the front, because the engine is in the front.

When the car brakes, the center of gravity of the car moves forward due to the action of inertia.

The front wheels of a car are generally heavier than the rear wheels, because the main components such as the engine are almost entirely loaded by the front wheels. At the same time, the center of gravity is relatively close to the front wheels.

When the car brakes, it is very fast due to inertia.

It may be that the forces are all leaning forward.

It must have been a hard braking, and it was fast.

That's because your car is a front-wheel drive car.

Because the power is concentrated in the front.

The main components, such as the engine, are almost entirely loaded by the front wheels.

Hello landlord, car brakes, using both front and rear wheels braking, mainly based on two points. The first is that it can brake better and shorten the braking distance. The second is that it can improve the stability of the vehicle after braking and prevent skidding.

Because during braking, due to the influence of inertia, the front wheels will be under huge pressure, so the car marks are very deep.

When the car brakes, the center of gravity of the car moves forward due to the action of inertia.

Because of the existence of inertia, the consequence of the center of gravity shifting forward.

Because of inertia, the center of gravity of the car will move forward.

Because when braking, the center of gravity of the car moves forward.

When braking, the weight is transferred to the front wheels, resulting in more friction on the front wheels

During braking, the weight is transferred to the front wheels, resulting in more friction on the front wheels.