What is the reason why the car feels like it can t brake when it brakes?

There are many reasons for brake failure, one is the lack of necessary maintenance of the brake system, too many impurities in the brake master cylinder, poor sealing, vacuum booster pump failure, and brake fluid.

After being too dirty or mixed use of several brake oils, there is air resistance, oil leakage from the brake master cylinder or sub-cylinder, and air leakage from the gas tank or pipeline interface; The second is the failure of the parts due to improper operation, such as the brake pads will be caused by a long downhill slope.

Friction heat generation, brake hub carbonization, and complete failure of brake function; The third is due to severe overload, acceleration in gravity.

Under the effect, the inertia of vehicle movement is increased, which directly leads to brake failure.

What to do if the brakes fail while driving.

1. Control the direction according to the road conditions and speed, disengage the high-speed gear, and at the same time quickly empty the fuel and shift the high-speed gear into the low-speed gear. In this way, the engine will have a lot of traction resistance and the speed of the vehicle will be reduced rapidly. In addition, the handbrake should be used in conjunction with the low-speed gear shift.

However, it should be noted that the handbrake cannot be tightened or pulled too slowly. If it is pulled too tightly, it is easy to make the brake disc "lock", and it is likely to damage the transmission parts and lose the braking ability; If it is pulled too slowly, the brake disc will wear and ablate and lose its braking effect.

2 Take advantage of the car's bumper.

Friction and collision between rigid parts such as carriages and natural obstacles (rocks, trees or soil slopes) on the side of the road can achieve the purpose of forcibly stopping and escaping and reducing accident losses as much as possible.

3. If the brake fails when going uphill, you should reduce it to the middle and low gear in time to maintain enough power to drive up to the top of the slope and stop. If you need to stop half-slope, you should keep the forward low gear.

Tighten the hand brake, and the personnel with the vehicle will jam the wheels with stones, skids and other objects in time. If there is a backward slippage, the rear of the car should face the hillside or the safety side, and the headlights and emergency lights should be turned on to attract the attention of the vehicles in front and behind.

4. When the downhill brake fails and the speed of the vehicle cannot be controlled by the mechanism of the vehicle itself, the driver should decisively use natural obstacles, such as rocks and trees on the side of the road, to cause resistance to the car. If you can't find a suitable terrain or object to use for a while, in an emergency, you can move one side of the car closer to the side of the mountain, and gradually reduce the speed of the vehicle by rubbing to increase the resistance.

5. When the vehicle is going down a long slope or a steep slope, it should apply the brakes regardless of whether there is a situation or not. It can not only test the performance of the brakes, but also buy time to control the speed of the vehicle when the brakes are found to be out of order, also known as predictive braking.

When the car brakes, it may be caused by brake fluid leakage or brake oil pump failure, so you should carefully check the brake system to identify the problem.

1. The braking force of the car itself is not good;

2. The brake fluid of the car is insufficient;

3. The brake pads are too thin;

4. The pattern of the tire is gone;

5. The speed is too fast and the inertia is too large.

Some of them are because of pedal problems! Corresponding to the solution can be.

It's generally a matter of brake pads.

If you feel that you can't brake when the car brakes, it may be that your brakes are faulty, such as the lack of brake fluid or brake pads, which will lead to unstoppable brakes.

Maybe the brakes are soft, maybe there is water in the brake fluid, and the water turns into water vapor, resulting in air resistance. Maybe you're driving too fast, and due to inertia, the car still slides forward after applying the brakes.

The reasons why the brakes can't be braked are as follows:

1. Brake failure caused by brake pump failure (may be due to lack of brake fluid or brake pump itself), although this situation rarely occurs, but it is the most dangerous. Therefore, the owner needs to carefully keep the vehicle brakes every day, such as sluggishness, pedal sinking, etc., please immediately go to a professional organization for maintenance, and when maintaining the vehicle, the inspection of the brake system must not be forgotten.

2. The reason for the weakening of the brakes caused by the vehicle itself is the mechanical wear and tear of the brakes, at present, the disc brake system has been very popular, the owner should often observe with the naked eye whether there are cracks on the surface of the brake disc, traces of excessive wear, and the other is to replace the brake disc at a fixed time and mileage in accordance with the maintenance instructions.

3. The disc brake system has been very popular, and the owner should often observe whether there are cracks and traces of excessive wear on the surface of the brake disc with the naked eye, and the other is to replace the brake disc at a regular time and mileage in accordance with the maintenance instructions.

4. From the influence of engine power, this situation usually occurs in small displacement models in summer, and the principle is not difficult to understand, because in summer, the owners are basically turning on the air conditioning throughout the whole process, especially the small displacement car, when the car air conditioning is turned on, the car engine will naturally have a load, so the car brakes are very heavy.

If the car cannot brake, it is necessary to check whether there is a lack of brake fluid and whether there is leakage, check whether the brake pads are seriously worn, the brake master cylinder is out of order and the brake cylinder is damaged.

If there is a car after the brakes are pressed. If you can't brake, there must be a problem with the brake disc. Take it in time. Check it out before it becomes a bigger problem.

The reason why the brake of the car cannot be braked is that the brake pad is worn, there is air in the brake oil, the brake oil deteriorates, the brake oil pipe leaks, the brake cylinder is stuck and does not return to the position, the brake master cylinder is worn and the leather bowl is leaking, and the ABS pump is not working properly.

Brake pads are seriously worn, there are problems with the brake master cylinder and sub-cylinder, lack of brake fluid, air in the brake pipe, insufficient air pressure in the air reservoir, damage to the pump or leakage of the pipeline, etc.

There are many reasons for this, search for it yourself, or go to a repair shop.

Here's why:

1. ABS startsThe car still has no obvious braking effect, and the braking distance has become significantly longer.

2. The wheels did not die violentlyThe ABS does not start, and the car rolls forward. For the first kind of problem, it should come from the tire, maybe the tire wear is more serious, and the static friction coefficient is everywhere, which makes the tire easy to die violently and leads to the premature intervention of ABS, which can not produce obvious braking force and affect safety.

Solution. Changing the tires, it is recommended to change the tire size to a size that will have a very obvious braking effect, and the second problem should come from the braking system itself.

If you can hear a noticeable friction sound when braking, then the brake pad is seriously aged and should be replaced immediately. If there is no sound, it is a brake pump failure, resulting in the brake piston can not work effectively, if so, it is recommended to go to the workshop to repair the brake assembly as soon as possible.

1. Daily operation errors.

Most of the reasons are due to mistakes in the operation and maintenance of the car. As a car owner, you must regularly maintain the car's braking system. Once there is a brake problem, it should not be underestimated, and you must go to the car 4S shop to check it clearly.

2. The car is overloaded.

In summer, many car owners will find that the brakes are very difficult to step on, the reason for this is because most cars will have air conditioning in summer, if the displacement of the car is not large, it is easy to increase the load of the engine, and ultimately affect the play of the brakes.

3. Weather factors.

The brakes are not firm. This is a situation where many car owners are using brakes. This is especially true for cars with small displacements. Because the power of the engine is not sufficient, and the air conditioning is turned on, the owner of the power pump can not play its due role when the braking process is repeated.

Possible causes:

1. There is air in the brake fluid;

2. The brake pads are seriously worn and close to their service life;

3. The brake pad is not well run-in during the initial use, resulting in a mirror surface on the brake pad surface, which leads to a decrease in the friction coefficient;

4. The brake pad is not installed in place, resulting in insufficient contact area between the brake pad and the brake disc or brake drum during braking;

5. The original brake master cylinder or sub-cylinder has been aged.

The reason why the car won't hit the brakes.

The braking effect is significantly reduced, often the brakes are stepped on and can not be stopped immediately, and continue to walk far forward to stop, this may be the car's braking system failure, this is the most terrible fault in driving, often easy to form traffic accidents, to do emergency treatment, generally to see whether the brake pads are aging, whether the brake fluid is deteriorated, whether the tires are seriously worn.

The reasons why the car won't brake are:

1. The brake system lacks necessary maintenance, there are too many impurities in the brake master cylinder, the sealing is not tight, and the vacuum booster pump fails;

2. The brake fluid is too dirty or several brake fluids are mixed, and there is air resistance after heating, resulting in the inability to brake the car;

3. Oil leakage from the brake master cylinder or sub-cylinder, air leakage from the air storage tank and pipeline interface, resulting in the inability to brake the car;

4. Due to improper operation, the parts fail, such as long-term downhill will cause the brake pad to rub and heat, the brake hub to carbonize, and the brake function to completely fail;

5. Due to serious overload, under the action of gravitational acceleration, the inertia of vehicle motion is increased, which directly leads to brake failure.

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.

Small cars are almost always vacuum-boosted oil brakes. The reason why the brakes do not work in the end is that the brake clearance of the four wheels is large.

It can be solved by adjusting the gap between the brake shoe and the brake drum. If it is elastic and ineffective when stepped on, there is air in the pipeline, which can be solved by deflating.

When the brake is stepped on to the end, first check the brake fluid to see if it is lacking, and then check whether the brake cylinder is leaking. If the sub-cylinder leaks, air will enter the brake, and the brake will go to the end as soon as you step on it, and it is recommended to go to the repair shop to check the brake pads.

The reason why the car can't brake the car may be that the parts of the car's brake system are faulty, resulting in the failure of the car's brake system, or the car's brake pads or brake discs are overworn, resulting in a longer braking distance of the car.

There are two kinds of common braking devices in automobiles: drum brakes and disc brakes, in which the manufacturing cost of drum brakes is relatively low, and the heat dissipation performance of disc brakes is relatively good, and the phenomenon of brake failure is not easy to occur. The working principle of the brake is to convert the kinetic energy of the car into frictional heat energy to consume, when braking, the brake pedal of the car is the brake lever linkage pressure, the brake pad transmitted to the brake drum is jammed by the brake, and the wheel disc makes the car achieve the purpose of decelerating or stopping the operation. The most important part of a car's braking system is the brake pads and discs, which need to be replaced regularly.

According to your description, the reasons for the analysis are as follows:

Brake pad wear, air in the brake oil, brake oil deterioration, brake oil pipe leakage, brake cylinder stuck and non-returning, brake master cylinder wear and leakage of leather bowl joints, ABS pump work abnormally and so on. Once this situation occurs, it is recommended to go to the repair shop immediately to check and deal with it, after all, it is related to the safety and happiness of the owner and others.