What s going on with car brake shaking? What causes car brake shaking?

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.

It's because the engine and gearbox are in a competitive state.

If you step on the brakes and hang the gear in D gear during the whole driving process, the car engine will run under the load situation, and stepping on the brake is equivalent to forcing the car engine and transmission to lose the driving force to move forward, which produces a slight flutter and everything is normal.

The two key components that make up the disc brake system software are the floating brake disc and the brake disc. Because in the case of the rainy season, the gas is very wet and cold, and the brake disc is very easy to rust when parking for more than three days under such conditions, and the area where the brake disc touches is likely to be higher and deeper, and it is easy to cause the phenomenon of the pedal jumping in the case of braking.

Stepping on the brakes is very common, generally because the brake pads are not replaced in time, resulting in serious wear and tear of the brake pads, and finally the brake discs appear grooves and scratches, so after the car replaces the brake pads, the brakes will appear to shake. Replace the brake disc.

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Hello, brake pads are worn unevenly.

The cleaning items of the first-level maintenance of the vehicle are:

1.Clean the body and wipe down the engine and chassis parts.

2.Clean and maintain your air filter.

3.Clean the gasoline filter.

4.Drain the deposits from the oil filter, turn the filter handle 3-4 times, clean the oil filter, and replace the filter element according to the degree of contamination.

5.Drain the oil and water accumulation from the gas tank.

It is normal to have a slight vibration when you step on the brakes and the steering wheel, because of the influence of the drag coefficient of the road surface and the deceleration of the body.

But usually around 60 miles slowly step on the brake pedal, first from the foot pedal to the jitter, with the pedal weight of the steering wheel also began to swing, it is necessary to measure the amount of brake disc runout, if the edge of the disc jumps large, then you have to replace the brake disc on it. If the front of the car is shaking when braking, it is necessary to check whether there is any space for the ball joint of the directional tie rod and the ball joint of the lower arm.

After a long time of driving in the car, and there has been a certain number of braking processes, the brake disc has a high temperature, when the emergency braking to ABS starts. We know that ABS is an anti-brake lock system, that is, an electronically controlled point brake, through the brake cylinder caliper to the brake disc continuous tightening and relaxation of the action, so that the brake disc is intermittently stretched strongly, when the brake deceleration is applied in the vehicle, heat is generated.

When there is too much heat, the brake rotor can deform. At this time, the brake disc will be deformed like a wave, and when braking at high speed, when the brake disc is restrained by the brake caliper, the uneven brake disc will vibrate, and be transmitted to the body and steering wheel through the steering lever and suspension, resulting in body vibration and unstable direction.

There are now two types of automotive braking systems:

One is hydraulic braking; The other is pneumatic braking. Hydraulic braking is delivered to each brake cylinder by the brake master cylinder with brake fluid as the transmission medium through the brake pipeline, so as to achieve the effect of braking and braking; The pneumatic braking is to use high-pressure gas as the braking medium, and then send it to each brake cylinder through the pipeline to achieve the braking effect.

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.

Causes of car brake shaking:

1. Brake disc eccentric wear.

That is, the unilateral wear is serious, this is due to the vehicle's own reasons, mainly because the brake pump is not well returned, the car brake is caused by the friction between the two friction plates and the brake disc through the extrusion of the brake pump and the braking disc produces the 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. Bad driving habits.

When the brake disc will produce high heat after continuously stepping on the brake, 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, and in the long run, the brake will tremble.

3. Use inferior 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 out more slowly (it itself is to wear) will also reduce the service life of the brake disc.

Workarounds to fix brake shivering:

1. Replace the brake disc.

This can be determined according to the use of the brake disc, if the brake disc has worn out a lot, it is recommended to replace it in one piece. If the brake disc is less worn, the second can be used.

Second, lathe processing.

The brake disc is disassembled and handed over to a professional lathe worker, who undergoes deep machining to restore dynamic balance again.

The car is "stuck", and the vehicle may cause poor ignition when the humidity is high or the engine is under heavy load, resulting in the phenomenon of "shaking and shaking". You can ask the maintenance master to check the following parts: 1. Check whether the ignition coil has leakage and internal short circuit; 2. Check whether the ignition coil line plug is loose and has poor contact; 3. Check whether there is corrosion at both ends of the battery; Fourth, check whether the body is in good condition.

Rim deformation. The tire is mounted on the rim, and the rim is deformed even if the tire will be deformed accordingly, causing the surface to be uneven and the wheel dynamic balance is inaccurate, and it vibrates when running. The shock absorber failed.

If the shock absorption fails, the impact on the tires when running at high speed will be transmitted to the car body without attenuation, causing the vibration of the entire body. Reasons for the vehicle to shake when stepping on the brakes: 1. If the body is trembling, you can first check the vacuum tube connected to the engine to confirm whether you touch the vacuum tube when you change the oil or do other maintenance, causing mixed gas leakage; 2. Secondly, confirm whether the vehicle has disconnected the battery during maintenance, resulting in the disappearance of the "learning value" of the engine throttle, resulting in the engine idling speed being too low, resulting in shaking; 3. Steering wheel shaking, generally speaking, the amount of plane deflection of the brake disc exceeds millimeters, and when the vehicle steps on the brakes at high speed, the brake pedal will jump slightly, and this beating will also be transmitted to the steering wheel through the relevant steering system, causing the steering wheel to shake left and right.

The brake disc exceeds the limit thickness after normal wear and tear and must be replaced; 4. In addition, if the wear of the brake disc does not exceed the minimum limit thickness, then the friction surface is processed with a machine tool to make the brake disc deflection less than millimeters, and then it can be reused.

When it comes to car driving shaking, basically many car owners encounter it. This has a great impact on the driving experience, and sometimes car owners will find that they have changed a lot of air filters and fuel additives for the car shake, but it just has no effect.

In fact, to solve the problem of car shake, you first need to find the real cause of the shake. In this regard, PetroChina popularized some common causes of abnormal shaking of cars in its official microscience.

The composition of the braking system is complex, and any part problem may cause abnormal shaking during braking.

One of the most common problems is wear and tear on the brake discs, which can lead to uneven braking force. In general, this situation may be caused by poor brake pads, poor quality or poor brake oil pump return. Therefore, if this situation occurs, it is also necessary to check whether the brake oil pump is faulty.

Hello, the brake steering wheel shake is the problem of the brake disc, and the brake disc can only be replaced. I hope my answer can help you. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Hello, it may be caused by uneven brake discs, it is recommended to change a set of brake discs and a set of brake pads, I hope it can help you [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Brake pads need to be changed once for 3 to 60,000 kilometers. In the braking system of a vehicle, the brake pads are the most important object, and the quality of the brakes is determined by the brake pads.

The reason for the brake disc [There is a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

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.

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.

Reasons for shaking when you step on the brakes:

1. The shock absorber fails. If the shock absorption fails, the impact on the tires when running at high speed will be transmitted to the car body without attenuation, causing the vibration of the entire body.

2. Tire dynamic balance problems. For example, after the tire is repaired, the rim is deformed, the tire is worn abnormally, the tire is pierced with big nails or entrained with large stones, etc., which will basically destroy the dynamic balance of the tire;

3. Semi-axial resonance. Most of these conditions are basically caused by the bending of the half-shaft (front-wheel drive car) or the transmission shaft (rear-wheel drive car), because the bending destroys the dynamic balance of the driveshaft, it will cause resonance when running, and most of them are basically vibrating at a certain speed, and there is no abnormality if it exceeds or falls below this speed.

At first glance, you are a newbie.

When the car brakes at about 30 km/h, you have to press the clutch at the same time.

That way, the car will never shake.

The reason for the shaking of the car when stepping on the brakes is affected by the eccentric wear of the brake disc, and the specific introduction of the main causes of the shaky of the car when braking is as follows: 1. The brake disc is eccentric wear, that is, the unilateral wear is serious: the vehicle's own brake pump is not good to return, and the car brake is caused by the friction of the brake disc through the extrusion of the brake pump and the brake disc to produce a braking effect, and the brake is only installed in the part connected with the friction plate inside.

2. The owner's usual use habits are not good: the brake disc will produce high heat after the owner continuously steps on the brake, and if you continue to slam on the brake, there is a possibility of destroying the dynamic balance of the brake disc, and improper operation will also lead to the deformation of the brake disc. 3. Cars use inferior brake pads:

Inferior brake pads contain a large amount of metal substances, and after the metal substances come into contact with the brake plate, because these metal substances are relatively hard, the service life of the brake disc will be reduced.

In fact, the phenomenon of shaking like this kind of braking appears more on some AT and CVT cars, and most of them are more than 100,000 yuan of automatic transmission cars, because the car noise, abnormal noise, and vibration belong to the NVH category of the car, and 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 ** volt only Pi 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 Shan Pei's hand in his fist with our other hand, the shaking 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.