What s going on with the new car slamming on the brakes

There are many reasons for abnormal brake noise, and if you want to know the specific reason, you can only judge according to the specific sound, and it is best to judge on the spot. Here are some for your reference.

1 - Brake pads are too worn: This is generally caused by the brake pads reaching the warning line or the brake pads are not grinding, and the sound is mostly metal friction sound and relatively sharp, if it is accompanied by the attenuation of the brake effect, it can be basically determined that this is the reason.

2 - Abnormal sound caused by brake pad material: Generally, when the brake pad material is harder, it is easier to cause this sound, relatively, the soft brake pad material is less likely to appear this type of abnormal noise, but the wear of the soft material is faster, and the corresponding replacement cycle is shorter than the hard one.

3 - The abnormal noise caused by the non-standard installation of the brake system is more complicated, if this is the reason, it is better to find someone to take a look. The above are the more common faults, as for the others, I will not list them one by one. All in all, the braking system belongs to the safety system, that is, the life-saving system, once there is an abnormality, it is the best policy to find a professional to diagnose it as soon as possible.

1. Rust of brake disc or brake pad: When parking for a long time, especially after the climate is humid or rainy, there will be a certain amount of rust or dirt on the brake disc or brake pad, which can be solved by opening for a while, or you can apply butter or special lubricating oil to the connection between the brake pad and the brake caliper.

2. New brake pads: when a new car steps on the brakes, there will be a similar sound, if your car is a new car or just replaced with new brake pads, then the new brake pads and brake discs need a run-in process, when the brakes are stepped on, this abnormal sound will be emitted, which is completely normal, but this sound does not disappear after a period of time There is a problem.

Let's talk about buying a car, using a car, maintaining a car, and repairing a car.

It should be a problem with the brake pads or the brake disc, but the brake disc is not much, most of the brake pads are not of good quality, or there is sand, resulting in a metal sound or abnormal sound when the brakes are made, it is recommended that the landlord can go to a reliable shop or 4S shop, check the brake pads, let the grinding be fine, it will generally be good, the landlord suggests that the grinding is not good, then replace the brake pads, if the funds allow, you can change the brake pads, the porcelain is soft, and the sound is small, the brakes will be soft, very powerful.

It may also be that the brake cylinder is rusty, and the roof of the car is turned down to the wheels, and if it can't be turned, it is locked. Just change the sub-pump. The pump needs to exhaust air, so you need to have 1L brake fluid.

Expand knowledge: point brake is a brake method used more than one or two decades ago, with the improvement of the level of automobile manufacturing, point brake has been eliminated, but some old drivers are still accustomed to this traditional method. In the past, the old vehicles did not have ABS (tire anti-lock braking system), when the braking force was large, the tires would lock, the steering wheel could not rotate, and the vehicle continued to rush forward due to inertia, easy to lose control, and some cars with a higher center of gravity would even overturn. A point brake can largely avoid tire locking, thus reducing accidents.

However, today's cars are basically equipped with ABS, and some also have ESP (Electronic Stability System), which can ensure that the tires of the car do not lock during emergency braking, avoiding accidents such as side slippage and tail flicking. Therefore, when braking sharply on the highway, there is no longer a need to brake, the driver holds the steering wheel with both hands and just steps on the brake to the end.

That's ABS started, it's normal.

When the ABS is working, the reaction sleeve moves left and right, and the driver can feel the pedal on his feet flutter and hear some noise.

1. Antilock brake system (ABS) is referred to as ABS. The function is to automatically control the braking force of the brake when the car is braking, so that the wheels are not locked and are in a state of rolling and slipping (the slip rate is about 20%), so as to ensure that the adhesion between the wheels and the ground is at the maximum.

2. When braking, ABS can quickly judge the locking state of the wheel according to the speed signal transmitted by each wheel speed sensor, close the normally open input solenoid valve on the wheel that begins to lock, so that the braking force remains unchanged, if the wheel continues to lock, then open the normally closed output solenoid valve, the braking pressure on the wheel moves down rapidly due to the pipeline that goes straight through the brake fluid reservoir, preventing the wheel from being completely locked due to excessive braking force. In keeping the braking state at the best point (slip rate S is 20%), the braking effect is the best and the driving is the safest.

3. The brake fluid in the front cavity of the brake master cylinder is the dynamic pressure brake fluid, which pushes the reaction sleeve to move to the right, and the reaction sleeve pushes the booster piston to move the brake pedal push rod to the right. Therefore, when the ABS is at work, the driver can feel the pedal flutter and hear some noise.

4. After the car slows down, once the ABS computer detects that the wheel locking state disappears, it will let the main control valve close, so that the system will turn into an ordinary braking state to work. If the pressure of the accumulator drops below the safe limit, the red brake fault indicator and the amber ABS fault indicator illuminate. In this case, the driver has to use a large force to apply a deep pedal-type braking method to effectively brake the front and rear wheels.

Rattling may be ABS out, but also depends on what the foot feels, if the brake pedal keeps bounce in the opposite direction, then it is sure that ABS is working, or there may be a loose tightening bolt of the tire.

It seems that your car is still good, that is ABS started, it is normal. Only a good car has a real ABS

That's anti-lock braking system ABS is very normal, don't worry.

Normally, the ABS pump rebounds the sound of the brake pedal during the process of preventing the wheels from locking up and protecting the steering ability in the event of a sudden braking.

The sound that occurs when rubbing against the road surface = =

Car A's sudden braking is urgent, and Quack wants you to explain that this brake pad should be about to break.

ABS works right, does it feel like a springy foot?

This should be the sound of the wheels and brake pads rubbing against each other.

In this case, it is possible that the belt inside the car is loose, and it is recommended to go to the repair point to see.

The causes of abnormal brake noise are as follows:

1. The run-in of new cars, in which the run-in of brake pads is a very important link, usually after running hundreds of kilometers, you can feel that the brakes will be more comfortable;

2. The new brake pads also need to be better combined with the old disc through running-in, and when you first put it on, you will feel that the brakes are very hard, and you usually need to drive hundreds of kilometers to feel better;

3. During the driving of the vehicle, there may be very fine sand particles into the middle of the sheet and the plate, and sometimes there will be abnormal noise due to friction, which generally does not need to be repaired.

4. For those who do not run in well and have abnormal noises, some car owners simply run up and slam on the brakes, so that the brakes can be run in in a short time, but this will make the brake pads wear more severely, that is, it is equivalent to reducing the service life of the brake pads, so it is recommended that you run for a while to observe, and do not artificially force the brake pads to be worn;

5. If the fixing screw of the brake disc is lost or damaged, it will also cause abnormal brake noise;

6. If the brake system fails, it needs to be inspected and repaired.

What causes a car to squeak when it hits the brakes?

The brakes of the new car are abnormal screaming: it may be that the brake pads of the new car are relatively thick and need some running-in; In addition, it may be that the brake pads of the new car have foreign objects or bumps, and it is recommended that the cloud 4S shop check them. The brakes of the new car are abnormal, which may be a run-in problem of the new car.

Or the brake disc of the new car will have a run-in period, and it is inevitable that there will be some abnormal noise and running during the run-in period.

The brakes of the new car are abnormal screaming: it may be that the brake pads of the new car are relatively thick and need some running-in; In addition, it may be that the brake pads of the new car have foreign objects or bumps, and it is recommended that the cloud 4S shop check them.

The brakes of the new car are abnormal, which may be a run-in problem of the new car. Or the brake disc of the new car will have a run-in period, and there will inevitably be some abnormal noise during the run-in period, which will be eliminated after running a few silver hands for 100 kilometers.

When the car brakes, it screams. In this case, it is likely that the brake pads are badly worn, and the alarm panel will make a sharp abnormal noise to prompt replacement. As a wear part of the whole vehicle, brake pads are frequently used by different car owners, so the replacement of brake pads is not as simple as the oil filter, and the replacement suggestions can be simply put forward according to the mileage.

Therefore, the vehicle's braking system has its own set of alarm systems to warn the owner to replace the brake pads.

In fact, the replacement cycle of brake pads is not fixed, depending on the road conditions of the vehicle, the frequency and strength of the driver pressing the brake pedal. In general, the front brake pads wear more than the rear brake pads. The service life of the front brake pads is about 3-50,000 kilometers, and the service life of the front of the rear brake pads is about 1-150,000 kilometers.

What's going on with the abnormal sound of the brakes when the new car is slammed on.

The brake discs of the new car are all new and need to be polished. At this time, there will be abnormal sound of braking, which is divided into vibration friction sound and sharp silk sound. But it will disappear after a few hundred kilometers.

The first thing to do in a new car is to run in the various systems of the new car. When the new car comes out of the 4S shop, all its performance can be used normally, but because it is a new car, the cooperation between many parts is not in the best condition, such as the junction of the two gears, there may be some corners that are not perfectly jointed, and these corners will be rounded during the run-in. During the run-in period, the general speed should not be too fast, and the maximum speed should be within 100 kilometers per hour.

Also, during the run-in period, it is necessary to bypass various road conditions, such as high speeds, so that all parts of the new car can adapt to the run-in under various road conditions and achieve the best performance. When a new car is on the road, the driver must pay attention to see if there is any water leakage or something. Although the probability of a new car breaking down is low, it does not mean that it will not occur.

Once a water leak occurs, it must be repaired in time. If you continue driving with a water leak, you are likely to burn out the engine. What's going on with the weird screaming when a new car hits the brakes What's going on with the weird screaming when a new car hits the brakes @2019

Cars are an indispensable tool for our daily travel, and we will encounter some problems during use, such as this: the problem of the car giggling when the brakes are applied. Then I will introduce it to you below, I hope you can help.

There are many reasons why a car makes abnormal noises when it hits the brakes, including excessive wear of brake pads, excessive wear of tires, damage to the steering machine, ABS starting, etc. The following is a detailed analysis.

1.Excessive wear of car brake pads:

If the car is used for a long time, the brake pads are overworn, or the brake pads are mixed with foreign objects, and there will naturally be a gurgling sound when the brakes are stepped on. In this case, the brake pads should be cleaned immediately. If the thickness of the brake pad is within 6mm, the brake pad should be replaced immediately.

2.Excessive tire wear:

If the tires are excessively worn, or have bulges, roundness, etc. It also makes the car make a sound while driving. In this case, the tires should be tested.

If it is excessively worn, it should be replaced immediately, and the four-wheel alignment and dynamic balancing should be done immediately after replacement. It should be noted that most cars reverse the front and rear wheels once when driving up and down 40,000 kilometers to balance the friction of the four wheels.

3.Steering machine damaged:

If the rubber sleeve of the steering gear falls off or the brake makes abnormal noises due to other faults, you need to go to the repair shop to ask professionals for inspection and repair.

4.Car ABS Start:

When the car brakes suddenly, the ABS anti-lock braking system will automatically activate. At this time, the brake sound is normal, and you don't need to pay attention to it.

If this happens, it is most likely because the brake pads are thin, the back plate grinds the brake disc, the brake pads are hard, and there are foreign objects in the brake pads, which will cause abnormal noise. Therefore, when there is an abnormal sound, first check the thickness of the brake pads. If there is no problem with the thickness, sudden braking may relieve the squeaky noise.

Causes of noise when the brakes are applied:1. The reason for the squeaking sound when braking can be that the brake pads are worn out and need to be replaced immediately.

The braking system often encounters must be the sound of brakes. Most of the braking sounds when the vehicle is driving, the braking system will emit a sharp metal friction sound, which mostly appears after rain; 2.The braking system is a maintenance item that many car owners will basically ignore.

The maintenance of the brake system is not only to change the brake oil, but also to remove each brake cylinder, clean and oil, so as to avoid the brake cylinder due to dirty and lack of lubrication caused by excessive wear of the brake cylinder 'guide pin' and jamming. In most cases, maintenance is basically carried out when the brake fluid or brake pads are replaced; 3.The brake discs are badly worn.

Severe wear of the brake disc can create deep grooves in the disc, and the friction of the brake disc against the edge of the groove can produce noise. If the groove is not deep, polish the edge of the brake pad; If the grooves are very deep, the brake disc needs to be replaced.