What is the shaking of the car when it hits the brakes

1. The surface of the brake disc is uneven, and the radial runout is too large. In this way, when braking, the contact between the brake pad and the brake disc is loose and tight, and the braking force is sometimes large and small, resulting in body vibration, which is obviously obvious when the brake is lightly stepped on, 2. The deviation of wheel alignment data is large, especially the front wheel positioning angle is inaccurate, and the toe is too large. In this case, it feels that the vehicle is difficult to control when accelerating, and the shaking is generally not large, but it is awkward.

3. The tire pressure is too high or too low. The higher the tire pressure is too high, the higher the speed, the more the body will vibrate. If the tire pressure is too low, the body will feel flickering and deviate.

In fact, the phenomenon of shaking like this kind of brake is more likely to appear in some AT and CVT cars, and most of them are more than 100,000 yuan of automatic transmission cars, because, car noise, abnormal noise, vibration belong to the NVH category of the car, NVH is a more complex design, many high-end cars have the energy and financial resources to do this kind of jitter filtering, but like some ** relatively low automatic transmission models, Maybe it's not so perfect in this area.

If you have this situation, you can first try to switch the gear of the automatic transmission from D to N gear when you apply the brakes, and see if there is still this kind of shaking, and when you are in N gear, you can turn on the air conditioner to see, if in both cases, the jitter will all disappear. Basically, it can be judged that the ** that shakes is our automatic transmission.

Moreover, it is caused by the torque converter in our automatic transmission. Because, when we park in D gear, at this time, the power transmission system is still working, and the automatic gearbox with hydraulic torque converter transmits power through oil pressure, which is to put it in layman's terms, that is, let the two fans face each other, one of them is energized and blows hard, then the fan blades of the other fan will also rotate.

When we step on the brakes in D gear, it is actually equivalent to the unplugged fan fan blade card, at this time the wind of the opposite fan is still blowing, in fact, this is the first pressure, which will produce oil pressure in the torque converter, this oil pressure is actually to the gearbox to hold a transmission force, so when we release the brakes, the automatic transmission car can go directly.

It is precisely because of this oil pressure that the car will shake, we can try, clench your fist hard, and when the force is very strong, your hands will tremble, the same reason. However, if we hold the hand that is clenched into a fist with the other hand, the jitter becomes noticeably smaller.

Therefore, basically as long as there is an automatic transmission car with a torque converter, because of the oil pressure, it will basically shake, the key is to do NVH, how to reduce this jitter, to filter this jitter, for example, to add more rubber pads, do shock isolation treatment, and increase the strength of the steel plate.

If our car does not have this kind of shaking of stepping on the brakes in D gear, it means that the NVH treatment process of this car is still good, if there is such a phenomenon, it is also very normal, in fact, it is useless for us to find a 4S shop, because it is not a fault, and it is not a design defect, after all, you get what you pay for, and this kind of jitter will not affect the reliability and durability of the car.

So what should we do if our car has this situation? First of all, what we can do is to try to accept its imperfections, and then adapt to it, so since the traffic light can not be put on D gear and brake, we will have one more operation, switch to N gear, etc.

Hope, thank you.

The reason for the shaking of the car when braking: it may be caused by the eccentric wear of the brake disc, which is mainly caused by the owner's long-term braking. To put it simply, the brake disc is uneven, and the uneven brake disc will cause the brake to shake when braking.

The specific causes of car shake when braking are as follows:

1.The brake disc is partially worn, i.e. one side is severely worn.

This is due to the vehicle's own reasons, mainly the poor return of the brake cylinder. Automobile braking is generated by the extrusion of the brake pump to make the two friction pads rub against the brake disc. Since the brake is only installed in the part connected to the internal friction plate, the unilateral wear will be aggravated when the brake cylinder is not completely reset after braking.

2.Normal usage habits.

When the brakes are applied continuously, the brake disc generates high heat. If you brake hard at this time, the dynamic balance of the brake disc may be disturbed. The brake disc is made of cast iron (pig iron), and although it is very stable, it can also deform if it is not operated properly.

3.Use low-quality brake pads.

Inferior brake pads will contain a large amount of metal substances, and after these metal substances come into contact with the brake disc, because these metal substances are relatively hard, the brake pads wear more slowly (that is, the wear itself), which will also reduce the service life of the brake disc.

I think it's mainly because it's so cold right now, so you might have the car just started for a while and arrived at the station, and the engine hasn't warmed up yet.

The reason for the shaking of the car when stepping on the brakes: it may be affected by the eccentric wear of the brake disc, which is mainly caused by the owner of the brake for a long time.

To put it simply, the brake disc presents a convex and concave, and when braking, the brake pad clamps the uneven brake disc, which will cause the brake to shake.

The specific reasons why the car shakes when the brakes are applied are as follows:

1. The brake disc is eccentric, that is, the unilateral wear is serious.

This is due to the vehicle's own reasons, mainly because the brake pump return is not good, the car brake is caused by two friction plates through the extrusion of the brake pump and the brake disc friction to produce a braking effect, because the brake is only installed in the part connected with the friction plate inside, when the brake pump brakes after the reset is not complete, it will lead to the aggravation of unilateral wear.

2. Usual usage habits.

When the brake disc is continuously stepped on after the brake will produce high heat, if you slam on the brake at this time, there is a possibility of destroying the dynamic balance of the brake disc, the brake disc is made of cast iron (pig iron), although its stability is very good, but improper operation will also deform.

3. Use inferior brake pads.

Inferior brake pads will contain a large number of metal substances, and after these metal substances come into contact with the brake disc, because these metal substances are relatively hard, the brake pad will wear out more slowly (it itself is to wear) will also reduce the service life of the brake disc.

If it is at high speed (more than 80 miles) and the steering wheel has a slight vibration, it is normal to have a slight vibration, because there is the influence of the drag coefficient of the road surface and the deceleration of the body. But usually in about 60 miles slowly step on the brake pedal, first from the pedal to the jitter, as the pedal aggravates the steering wheel also begins to swing, it is necessary to measure the amount of brake disc jump, if the edge of the disc jumps large, but the flange runout is normal, then you have to replace the brake disc on it. If the runout of the flange is too large, then the elevation bearing, flange and brake disc need to be replaced together.

Because the brake disc at this time will also be worn and deformed. If the front of the car is shaking when braking, it is necessary to check whether there is any space for the ball head of the directional dry pull and the ball head of the lower arm.

Answer: After opening the engine cover, a large black disc can be seen under the windshield on the main driver's side, this part is the vacuum booster pump, and in front of the vacuum booster pump, is the brake master cylinder.

Question: At 50 mph, step on the brakes and shake.

Personally, I think that there is only one reason for the body to tremble, that is, the brake disc.

If the car shakes after pressing the brake pedal, it may be caused by an uneven surface of the brake disc, which is caused by some small stones entering the brake disc during braking.

Question, the day before yesterday I finished the four-wheel maintenance, a little better, drove 100 kilometers and shook badly, this afternoon the front wheel left and right to change the tires, the car trembled badly.

Question: Brake discs?

If the surface of the brake disc is very undulating, then the brake disc needs to be replaced.

If the undulation of the surface of the brake disc is not very strong, you can remove the brake disc and grind it.

Trembling vibration when braking is usually caused by uneven wear of the brake disc, such as the outer side is thicker than the inner side or the inner side is thicker than the outer side, when braking, the brake pad is vertically clamped the brake disc, and the brake disc is uneven and does not fully fit the brake pad will tremble, the higher the speed, the more shaky, the more difficult it is to brake the car.

What is the cause of shivering vibration when braking.

Brake shake can also occur over a period of time when inferior brake pads have been used or replaced with new ones. Due to the more metal content in the inferior brake pads, the performance is harder, and the friction with the metal brake disc is easy to resonate to amplify the vibration and shake, so a mileage after replacing the new brake pads should be driven cautiously to avoid emergency braking.

Steering wheel shaking when you hit the brakes? Usually it has a problem, and the old driver teaches you to spend a small amount of money to fix a big problem.

Causes of the shivering vibration of the car when the brakes are applied:1. There is a problem with the brake pads and brake discs.

2. The unilateral wear of the brake disc is serious.

3. The brake pump is not well returned.

Compared with brake pads, the wear and tear of brake discs is relatively slow, and repair shops generally recommend replacing brake pads and brake fluid. After a certain period of use, the brake disc is worn, and the surface is uneven or the thickness is not up to standard, which will seriously affect the braking performance in the long run.

Introduction to brakes. Braking, also known as braking, refers to the action of stopping or reducing the speed of locomotives, rolling stock, other means of transportation or machinery in operation. The general principle of braking is to fix a wheel or disc on the high-speed shaft of the machine, install the corresponding brake shoe, belt or disc on the machine base, and make it produce braking torque under the action of external force.

If not replaced, the heat dissipation effect of the brake disc will deteriorate (the heat capacity will be reduced), which will cause the brakes to be soft and the braking force to decrease, which means that it used to take 40 meters to stop and now it needs 50 meters to stop. If you run down a long slope in a mountainous area, it may cause the temperature of the brake disc to be too high and burn out the brake cylinder.

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Dear, hello, hello, the vehicle brakes are shivering, there are the following reasons.

The brake pads of the first vehicle are too thin, and this phenomenon needs to be checked in time, and if the thickness of the brake pads is less than one centimeter, they need to be replaced in time.

The second brake disc is uneven or the brake disc is obviously worn out of this phenomenon, the brake disc needs to be checked, if there is obvious wear, the brake disc needs to be replaced.

Third, the hem of the vehicle chassis, the arm ball head or the rubber sleeve are caused by the gap, this phenomenon needs to check the hem arm [Abstract].

Hello, happy to answer your questions.

Hello, dear, the exclusive technician of the car master will serve you, attentively, carefully and attentively answer your car questions, find solutions and solutions to the corresponding problems for you, and will definitely provide you with satisfactory service! I hope my answer can help you!

Dear, hello, hello, the vehicle brakes are shivering, there are the following reasons.

The brake pads of the first vehicle are too thin, and this phenomenon needs to be checked in time, and if the thickness of the brake pads is less than one centimeter, they need to be replaced in time.

The second brake disc is uneven or the brake disc is obviously worn out of this phenomenon, the brake disc needs to be checked, if there is obvious wear, the brake disc needs to be replaced.

Third, the hem of the vehicle chassis, the arm ball head or the rubber sleeve are caused by the gap, this phenomenon needs to be checked for the swing arm.

Solution: Replace the brake disc or polish the brake disc. 2.

Specific reasons: For manual transmission, when the vehicle is in low gear and high torque, the brake pedal and clutch pedal will have a slight vibration, which is a normal phenomenon; For automatic transmission, it is normal for the pedal to shake when the D gear is hung and the brakes are stepped on, and the pedal shake is normal, and there will be no strong shake when hung in the N gear or P gear; The different wear patterns on both sides of the tire and the different tire pressure will also cause the brake pedal to shake; The brake disc will also shake when it is deformed, especially when braking suddenly, and the brake disc is generally recommended to be replaced. The car shook when it was too late to slip on the brakes.

The reasons for the shaking of the car when the brakes are stepped on are as follows: 1. For manual transmission, when the vehicle is in low gear and high torque, the brake pedal and clutch pedal will have a slight vibration, which is a normal phenomenon. 2. For automatic transmission, when the pedal shakes when the red light such as the D gear is hung and the brakes are stepped on, it is also normal, and there will be no strong feeling when it is hung in the N gear or P gear.

3. The wear of the tread on both sides of the tire is not the same, and the tire pressure is different, which will also cause the brake pedal to shake. 4. The brake disc will also shake when it is deformed, especially when braking suddenly, and the brake disc is generally recommended to be replaced.

Causes of car brake shaking:

1. The main fault reason is that the carbon deposition of the throttle, intake tract, valve and other parts increases, and some gasoline is adsorbed when the car is cool, and after the car is hot, the gasoline volatilizes out, which will cause the mixture to be too thick when the engine is idling, resulting in unstable idle speed of the hot car;

2. So you should not only check the throttle and idle motor, etc., but also check whether there is too much carbon and dirt in the intake tract;

3. If there are too many, it will cause the cross-sectional area of the air passage to change, so that the control unit can not accurately control the idle air intake, resulting in the mixture being too thick or too thin, making the combustion abnormal and causing the engine to shake. At the same time, it is also necessary to check whether the canister is faulty.