Can a car be fitted with both drum brakes and disc brakes?

I can load it completely. In the past, cars within 100,000 were all available, and only high-end cars were disc front and rear. The main reason is that the drum type has a low cost and poor braking performance.

There are many such cars, and cheap economy cars are generally bulging in the front and back. My first car was yes.

Now the second car is a disc type in front and rear, but the disc type is also called a butterfly type.

At present, some of the 70,000 or 80,000 domestic cars have also canceled the drum brake, and the front and rear are equipped with discs.

Disc brakes and disc brakes are actually the same, but the name is different.

Automobile braking systems are divided into two types: drum brakes and disc brakes.

Drum brake uses brake shoe pads to squeeze the brake drum to generate braking force to brake, mostly used in small trucks and low-grade cars, because of its weak braking force, wet water is easy to cause instantaneous brake failure, thermal decay and other reasons, has been on the verge of elimination, belongs to backward technology.

The current mainstream braking system is disc brakes. Disc brake systems are further divided into solid disc brakes and ventilated disc brakes. The principle is the same, they all use the pressure generated by the brake oil pump to drive the brake caliper to squeeze the brake disc to generate braking force.

The main features are small thermal attenuation, sensitive braking, and the ABS system can effectively prevent the wheels from locking, and the braking force is strong.

It's just that the brake disc ruler of the solid disc brake system has less rain, and there are no ventilation holes, and the braking force is not as large as the ventilated disc, but the solid disc brake system is cheaper to manufacture.

Strength disc brakes are mostly used in mid-to-high-end cars, and ventilated disc brakes are mostly used in high-end cars, sports cars, racing cars and other models with extremely high requirements for braking systems.

Yes, there are a lot of front and rear drum cars, which are generally low-end models and relatively high-end commercial vehicles. . .

Haven't you heard of the front and back drums?

The advantages of disc brakes compared to drum brakes are:

1. The brake efficiency is less affected by the friction coefficient, and the braking efficiency is stable. 2. The braking efficiency does not decrease significantly after immersion, and it can be recovered after only one or two braking. 3. It has good self-cleaning ability and good heat dissipation performance.

The disadvantages of disc brakes compared to drum brakes are:

1. The manufacturing requirements for brakes and brake pipelines are high, and the consumption of friction pads is large and the cost is high. 2. Because the area of the friction plate is small, the working surface of the relative friction is also small, the required braking hydraulic pressure is high, and the vehicle must have a booster device to use it to make the efficiency low, so the pressure of the brake actuation pipeline required when used in the hydraulic braking system is higher, and the servo device is generally used. 3. When it is also used for parking brake, the parking brake device that needs to be installed is more complicated.

Advantages: (1) Stable braking efficiency.

2) Water recession has less impact.

3) Thermal recession has less effect.

4) In the case of re-output of the same braking torque, the size and mass are generally smaller.

5) It is easier to realize the self-adjustment of the gap, and its maintenance and repair operation is also simpler.

Disadvantages: (1) The braking efficiency is low, and the servo device is generally used.

2) When the pampa is used for parking brake, the transmission device added is more complex, so the application on the rear wheel is limited.

1. Advantages and disadvantages of disc brakes.

Advantages: 1. The heat dissipation of disc brake is better than that of drum brake, and it will not cause brake recession and brake failure when continuously stepping on the brake.

2. The disc braking system responds quickly and can do high-frequency braking actions, so it is more in line with the needs of the ABS system.

3. Disc brake does not have the automatic braking effect of drum brake, so the braking force of the left and right wheels is relatively average.

4. Due to the better drainage of the brake disc, it can reduce the situation of poor brake caused by water or sediment.

Disadvantages: 1. On heavy trucks, the braking effect is very stable within the normal standard load range. On the contrary, for heavy trucks with overload, the effect of disc braking will be greatly reduced.

2. The friction area between the brake pad and the brake disc of the disc brake is smaller than that of the drum brake, so that the power of the brake is also relatively 3Brake pads are worn out and may be replaced more frequently.

3. Because the brake disc is exposed to the air for a long time, it will inevitably be corroded by water stains.

2. Drum brake.

Advantages of drum brakes.

1. It has the effect of automatic braking enhancement, so that the braking system can use lower oil pressure, or use brake drums with a diameter much smaller than the brake disc;

2. The processing and composition of parts are relatively simple, and the maintenance cost is low;

Drum brake disadvantages.

1. The diameter of the brake drum of the drum brake will increase after being heated, which will increase the stroke of pressing the brake pedal, and it is easy to cause the brake response to be less than expected;

2. The response of the braking system is slow, the pedaling force of the brake is not easy to control, and there is a problem of thermal decay, which is not conducive to high-frequency braking action;

3. There are many parts with complex structure, and the recovery of the drum brake is poor after water ingress;

Features of Disc Brakes Disc brakes have the following advantages compared to drum brakes.

Generally, there is no friction to help the potential, so the brake efficiency is less affected by the friction coefficient, that is, the efficiency is more stable.

After immersion, there is less reduction in efficiency, and it only takes one or two brakes to restore positive cherry resistance.

In the case of the same output braking torque, the size and mass are generally smaller.

The thermal expansion of the brake disc along the thickness direction is extremely small, and does not cause the brake pedal to travel too much due to a significant increase in brake clearance, as is the case with the thermal expansion of the brake drum.

It is easier to automatically adjust the gap, and other maintenance and repair work is also easier.

Because the brake disc is exposed, it also has the advantage of good heat dissipation.

The disadvantage of disc brakes is that the efficiency is low, so the brake line pressure required when used in hydraulic braking systems is high, and servos are generally used. The stool is bright.

At present, disc brakes have been widely used in cars, in some high-end cars for all wheels, low-end cars are only used as front wheels, and with the rear wheel of the drum brake, in order for the vehicle to have a higher directional stability when braking.

What you have to ask is what are the advantages of disc brakes compared to drum brakes? The advantages are as follows:

1. Compared with the drum brake, the working surface of the disc brake is flat and heat is transmitted on both sides, the disc rotation is easy to cool and clear, not easy to cause large deformation, and the braking efficiency is relatively stable.

2. After long-term use, the brake disc expands due to high temperature, so that the braking effect is enhanced; The drum brake has a large temperature difference between the inside and outside of the drum brake, which causes the brake drum to be easily deformed, and at the same time, after long-term braking, the brake drum expands due to high temperature, and the braking efficiency is weakened.

The Panzhilu brake has a simple structure, easy maintenance, and is easy to realize the automatic adjustment of the brake clearance.

Advantages and disadvantages of disc brakes and drum brakes:

1. The cost of drum brakes is cheap, and the wild sales are in line with the traditional design, for heavy vehicles, because the speed is generally not very high, the durability of brake shoes is also higher than that of disc brakes, and in the case of obtaining the same braking torque, the diameter of the brake drum of the drum brake device is much smaller than that of the disc type, so many heavy-duty vehicles still use the design of four-wheel drum type;

2. The heat dissipation performance of the disc brake is very good, and the response of the braking system is relatively fast, and it can do high-frequency braking actions. Compared to drum brakes, disc brakes are simple in structure and easy to maintain. Under the same size, because the contact area between the brake pads of the drum brake and the brake drum is larger than that of the disc brake, the braking force of the drum is also larger;

3. The heat dissipation of the drum brake is much worse, and secondly, the braking force stability is insufficient, and the braking changes greatly on different road surfaces, which is not easy to control, and may cause brake recession and brake failure when continuously stepping on the brake. In addition, after using the drum brake for a period of time, the gap of the brake shoe should be adjusted regularly, and even the entire brake drum should be removed to clean up the accumulated brake powder;

4. The cost of disc brake is relatively expensive, and it is not suitable for some special environments, such as when there is more sand and gravel, it will be easy to damage the brake disc. In addition, the friction area between the brake pads and the brake disc of the disc brake is smaller than that of the drum brake, and the power of the brake is also smaller, and the wear of the brake pad is larger, and the frequency of replacement is higher.