What are the benefits of disc brakes? What are the benefits of electric disc brakes

Disc brakes, also known as disc brakes, are named after their shape. It is controlled by hydraulic pressure, and the main components are brake discs, brake cylinders, brake calipers, oil pipes, etc. The brake discs are made of alloy steel and fastened to the axle and rotate with the wheels.

The sub-cylinder is fixed to the base plate of the brake. The two friction pads on the caliper are mounted on each side of the brake disc. The piston of the sub-cylinder is driven by the hydraulic pressure from the oil pipe to push the friction plate to the brake disc to cause friction braking.

This kind of brake dissipates heat quickly, is light in weight, simple in structure, and easy to adjust. In particular, it has good high temperature resistance under high load, stable braking effect, and is not afraid of muddy and water invasion. Some disc brakes also have many small holes on the brake disc to accelerate ventilation and heat dissipation to improve braking efficiency, such disc brakes are also called ventilated disc brakes, and the performance of disc brakes is better than that of front disc and rear drum brakes, but it will also be slightly more expensive Car drum brakes are generally used for rear wheels (disc brakes for front wheels).

In addition to the relatively low cost, the drum brake also has an advantage, that is, it is easy to combine with the parking (parking) brake, where the rear wheel is the drum brake of the car, the parking brake is also combined on the rear brake. This is a mechanical system, which is completely separated from the on-board braking hydraulic system: the hand lever or parking pedal (American car) is used to tighten the steel cable, and the parts of the drum brake are manipulated to extend the brake shoes to play the role of parking brake, so that the car will not slip; Loosen the steel cable, the return spring returns the brake shoes to their original position, and the braking force disappears.

The thermal attenuation of disc brakes is less than that of drum brakes, and the braking distance is shorter. Easy to maintain.

Compared to drum brakes, it can brake more quickly

It is better to choose a single disc brake or a double disc brake for electric vehicles.

When you're going uphill. And the slope is steep, pressing the front brake can prevent the car from rolling backwards. When going downhill, press the rear brake, and the principle is the same as before.

Now the road rear brake is sufficient, and the front brake can be left unattended. But you must not do without the rear brake, because once you are fast, it is dangerous to press the front brake.

In general, mountaineering bicycles use more front brakes.

1. Solid brake disc.

A physical brake disc is a metal disc used for braking. This type of brake disc has a simple structure and is cheap. However, the heat dissipation effect is poor, so the thermal braking effect is relatively poor.

2. Ordinary ventilation type.

The normal ventilated type is an improvement on the basis of the physical brake disc. The heat dissipation performance has been enhanced, and the braking effect is more stable, which is currently used in most cars.

3. Perforated brake discs.

The perforated brake disc has better cooling, shortens the braking distance, and has a more stable braking effect, which is generally suitable for high-end cars.

4. Scribing brake discs.

The dust and debris attached to the brake disc can be discharged, and the rainwater can also be discharged when the road surface is wet in rainy days, so that the car will not be affected by excessive rain on the brake disc.

5. Ceramic composite brake disc.

It is made of a mixture of carbon fiber, graphite and silicon, whether it is hot or cold braking, it has better braking performance and longer service life, and is generally used on high-end cars or high-end sports cars.

Now the cars sold on the market are basically disc brakes in the front and rear, and there are also low-end configurations in some mid-range cars with front disc and rear drums. The advantage of disc brake is that the braking force is strong, and the heat dissipation is good, so that the thermal decay is not obvious and the braking force is maintained. Therefore, the vast majority of front brakes are disc brakes.

The disadvantage of disc brakes is that the brake pads and brake discs are replaced regularly, and the follow-up cost is higher. The replacement of brake discs has a great relationship with driving habits, and it is the most expensive to start and brake violently. The factors that affect the braking force of the disc brake are the size of the brake disc and the type of brake disc.

The size of the brake disc is different for different models with different power outputs, and the larger the brake disc, the better the braking force. The brake disc is divided into ordinary solid brake disc and ventilated disc, and the more powerful the engine, the more powerful the engine is usually equipped with a ventilated disc, and the ventilated disc is faster than the ordinary disc to dissipate heat. Many modified brake discs are perforated and grooved, and their purpose is to dissipate heat as soon as possible.

Friends who buy mid-to-high-end models must compare the size of the brake disc and whether it is a ventilated disc.

No matter what type of contact area is paid attention to, because the force is the same, the larger the force area, the greater the friction, the drum brake to do a large area, to increase the hub, waste! , not larger, can only use disc brakes more priority.

No, he, friction converts kinetic energy into heat energy when braking, the advantage is good effect, fast heat dissipation, and sensitivity. It can be made into brake pads with a large diameter (for example, the diameter of a high-performance sports car can reach 35 cm or even larger), and generally the car with better power uses disc brakes, but its cost is high, and the cost of accessories is also high. Drum brakes, on the other hand, are hydraulic or air-driven drum brakes to brake the wheels.

The drum brake was applied much earlier, and the truck used this way, the advantage is cheap, and the disadvantage is the advantage of the disc brake.

Due to poor heat dissipation, a large amount of heat can accumulate during braking. Brake shoes and wheel drums are more likely to occur under the influence of high temperatures, especially the front-drive car with the front engine like PP, 70-80% of the distribution of braking force is by the front wheel, and only about 20% of the braking force is borne by the rear wheel, so the phenomenon of brake "can not brake" occurs, first of all, it should be modified from the "front brake", and the rear wheel drum brake strength is not worse than the rear wheel disc brake.

The main disadvantages of "drum brakes" are: the brakes are not linear, difficult to control, and the recovery ability after thermal and water decay is poor.

Therefore, the disadvantage of the "drum brake" is not that the braking efficiency is low, due to the increasing potential of the drum brake, in fact, its efficiency is higher than that of the disc brake, unless you are stepping continuously at a speed of more than 100 kilometers per hour.

Six or seven times of heavy braking, there may be a phenomenon of thermal decay, but the average person is unlikely to brake like this, in fact, this is everyone's prejudice, the braking strength of the drum brake, far greater than the disc brake, generally we buy something, it must be the more expensive the quality of the better, the result to the brake here, it subverts the usual cognition, the cheap is more powerful? In order to help you solve your doubts, today from a scientific point of view, I will tell you about drum brakes and disc brakes, what are they all about?

First of all, disc brakes and drum brakes, although there is a difference of 108,000 miles in appearance, but the principle of their work is very similar: they are all through friction brake pads, friction resistance to slow down the wheels, disc brakes we see more, its main parts are two: one is a caliper equipped with brake pads for reference only.

There is no need, the disc brake adopts the way of caliper clamping the brake disc, the braking effect is better, the general front driving wheel will use the disc brake, the drum brake adopts the brake shoe to support the friction brake drum, the braking effect is also good, but it is not easy to dissipate heat compared to the disc brake, and is mostly used for the rear wheels of low-end cars. What kind of brake is used, the manufacturer has strictly calculated the weight, speed and other parameters, so there is no need to change.

Not necessarily. Many hatchback drum brakes are safer, and there is no need to invest in this.

If the family car is not necessary.

Hello, Car Master Mechanic is here to serve you. Attentive, careful, attentive, for you to answer the car fault problems, for you to find the corresponding problem solutions and maintenance methods. We will provide you with a satisfactory answer to your questions, I hope this service can help you, if it is helpful to you, I look forward to your praise and attention.

I wish you good luck in the Year of the Tiger, good luck, Hello friend, you can change this disc brake friend if you say you dislike this ancient temple, the brake is not working. You can mod, and this friend can mod. So go to your local tuning shop or go to this repair shop can be modified, if you modify **, it depends on what kind of car you are, which is different according to the ** of the vehicle.

Question: Can the Santana rear drum brake be changed to a disc brake?

To answer your words about this car Santana, I personally recommend that you do not need to modify this disc brake, because if you are using this car, the ancient brakes behind you are also very smart. Personally, I recommend not modifying, this one doesn't make much sense. The cost of modification, your car is not low, at least it is about 2600 yuan, and it is not cheap to modify, and I personally recommend that it is not necessary.

The rear wheel drum brake of this car is also very flexible.

The double-action liner provides a huge braking force and a comfortable feel The brake will definitely have thermal decay when used for a long period of time If there is a meter, you can use a double-layer ventilated disc The disc is no problem if it gets wet, as long as it doesn't get the oil up.

The oil disc can be washed with water The oil disc mainly provides you with a lot of braking power It is very useful in am fr dh How much do you plan to spend on the oil disc.

Disc brake advantages:

Since the brake system is not sealed, the fine chips of brake wear are constantly deposited on the brakes, and the centrifugal force of the disc brakes can throw all water, dust and other pollutants outward to maintain a certain cleanliness. In addition, disc brake parts are easier to service than drum brakes because they are separated.

Disc brake disadvantages:

In addition to the higher cost, disc brakes are basically better than drum brakes. Disc brakes, also known as disc brakes, are named after their shape. It is controlled by hydraulic pressure, and the main components are brake discs, cylinders, brake calipers, oil pipes, etc.

The brake disc is made of alloy steel and fixed to the wheel, which rotates with the wheel. The sub-cylinder is fixed on the bottom plate of the brake. The two friction pads on the caliper are mounted on each side of the brake disc.

The piston of the sub-cylinder is driven by the hydraulic pressure from the oil pipe, and the friction plate is pressed against the brake disc to cause friction braking, and the action is as if the rotating disc is clamped with pliers to force it to stop. This kind of brake dissipates heat quickly, is light in weight, simple in structure, and easy to adjust.

Especially under high load, the high temperature resistance is good, the braking effect is stable, and it is not afraid of mud and water invasion, in winter and bad road conditions, disc brakes are easier to stop the car in a shorter time than drum brakes. Some disc brakes also have many small holes in the brake disc to accelerate ventilation and heat dissipation and improve braking efficiency. On the other hand, drum brakes, due to poor heat dissipation, will accumulate a lot of heat during braking.

Under the influence of high temperature, brake shoes and wheel drums are prone to extremely complex deformation, which is easy to produce brake recession and vibration, resulting in a decrease in braking efficiency. Of course, disc brakes have their own flaws. For example, the manufacturing requirements of brakes and brake pipelines are higher, the consumption of friction plates is larger, and the cost is expensive, and because the area of friction plates is small, the working surface of relative friction is also smaller, the brake hydraulic pressure required is high, and the vehicle that must have a booster device can be used, so it can only be applied to light vehicles.

Whereas, drum brakes are relatively inexpensive and economical.

It is used by the hydraulic brake booster oil pump to help the brakes step on the brakes with greater strength. As a medium of force conduction, the brake pedal pushes the piston of the brake master cylinder, which acts the force on the brake fluid.

On the plate, because the oil pipe can be arranged at will, it is convenient for the layout of the brake system, and then the pressure of the brake oil acts on the brake cylinder, and finally pushes the brake element to form a braking force. This is also the principle for hydraulic clutches.

Please note when choosing:

Look at the product viscosity and color, brake fluid.

Too thin can not be used, no color, transparent can not be used (generally the color of qualified brake fluid is light yellow or dark yellow), qualified brake fluid is obviously more viscous than water, looks very much like diluted honey, poured on the glass plate diffuse slowly. The viscosity of inferior brake fluid is as thin as water, and a small amount of it spreads quickly on the glass plate, and it can be felt that there is no consistency when you dip your fingers.

Comparison**, cost decides**, **determines quality. The raw materials of qualified brake fluid are mainly the basic raw materials for petroleum processing - ethylene oxide.

Polymerization of ethylene oxide into polyethylene glycol.

Monoether, the current ethylene oxide monomer is 16,000 yuan tons. This results in a high material cost for qualified brake fluid. At normal production costs.

Judgment, where the retail price of 800g per bottle is less than 20 yuan bottles of brake fluid, it is very likely that the product is not up to standard, of which the retail price of about 10 yuan 800g brake fluid is 100% inferior brake fluid products.

The brake mainly depends on the force of the oil, and if there is air in the pipeline, the brake will not work.