What are the benefits of hydraulic disc brakes for electric vehicles compared to traditional braking

The braking effect should be good.

It is more efficient to brake by pressurizing the oil pump than by passing through the steel cable.

1. Disc brake.

Using hydraulic transmission, the brake resistance arm is larger, the braking effect is good, and the high-end car is selected, and the use will become more and more common.

2. Drum brake. Using mechanical transmission, the brake resistance arm is smaller than the disc brake, which is low and has a good braking effect.

3. Hold the brake. Using mechanical transmission, the brake resistance arm is smaller than the disc brake, which is generally used in early electric vehicles, and the biggest feature is the sharp whistling sound when braking. This one is long overdue.

4. Rise brake. The effect is good and the safety is high, but it is limited by the wheel and is not easy to modify. Due to the different structures of the electric moped rear wheel can only be installed expansion brake or holding brake, the drum brake pad is wider, the friction torque is larger, and the wear is smaller, the life is long, but the operating torque is larger, the general expansion brake is mostly manual, and the cable is too long, the service life is short, and the effect is not as good as the drum brake.

5, V brake. It is a very common braking device on the bicycle, and the friction force is generated by two brake pads clamping each other on the rim, so as to achieve the effect of braking. Because its shape resembles the "V" word, it is called a V brake. V-brakes are widely used in all kinds of bicycles and electric vehicles.

It is low cost and easy to repair, but it is easy to slip in rain, mud or wading roads.

There are 3 types of electric frequency vehicle braking systems:

EV braking can be divided into the following three modes, and different modes should be supplemented by different control strategies.

1.Emergency braking: Corresponding to the process of braking deceleration greater than 2m s2, mechanical friction braking should be the main one for safety reasons, and electrical braking should only play an auxiliary role.

In the case of sudden braking, according to the difference in the initial speed, the corresponding mechanical friction braking force can be provided by the ABS control on the vehicle.

2.Medium and light braking: corresponding to the braking process of the car under normal working conditions, such as red light or stop at a station, etc., it can be divided into deceleration process and stop process. The electric brake is responsible for the deceleration process, and the stopping process is done by mechanical friction braking.

3.Braking when the car is on a long downhill slope: The long downhill of an electric vehicle generally occurs when the road is on a gentle slope, and when the braking force requirements are not large, it can fully work in the pure regenerative braking mode.

There are currently only three.

One is the stacked brake, which is used for bicycles, which is basically eliminated and not used.

2 is the brake, installed in the front wheel mostly, the first two years have been installed in the rear wheel 3 is the brake, basically the installation of the rear wheel, because the effect is good.

There are disc brakes on motorcycles, and a few change to electric vehicles on their own.

1. Common braking methods for battery cars:

1. Disc brake: hydraulic transmission, large brake resistance arm, good braking effect, high-end car selection.

2. Drum brake: mechanical transmission is adopted, and the brake resistance arm is smaller than that of the disc brake, which is low and has a good braking effect.

3. Holding brake: the use of mechanical transmission, the brake resistance arm is smaller than the disc brake, the early electric vehicles are generally used, the biggest feature is the sharp whistling sound when braking. It is now retired.

Second, the new electric vehicle EABS electronic brake.

1) System Principle:

1. The design principle of the EABS system The brushless EABS system makes full use of the characteristics of the electronic commutation of the brushless system, and controls the different motion states of the motor through programming.

2. The mature control mode of the brushless motor system is the three-phase six-state PWM driving mode, which detects the 8 signals generated by the 3 Hall elements of the relative position of the stator and rotor of the motor, and the controller program automatically deletes the two illegal states and generates the motor driving signal from the six state signals.

3. The EABS electronic brake system contains 2 sets of motor drivers, the first set is the normal state, which controls the normal drive of the motor and the brake power off; The second set is the electric brake control program, when there is an electric brake signal, the program starts, and the Hall signal is artificially (program-controlled) adjusted at the same time as the power is off, so that the motor is in a reverse state, which is equivalent to reversing the magnetic field to achieve the effect of rapid braking.

4. For example, assuming that the motor hall signal is 001, when the second set of electric brake programs starts, the program changes it to 100, and the rest of the states are reversed accordingly. In this way, the motor will produce short-term high-intensity energy after power-off, and the energy is determined by the linear speed of the stator coil winding cutting the magnetic field, and when the speed drops to 0, the electric braking force disappears, that is, the higher the speed, the stronger the braking force. In the power-off state, part of the energy generated by the motor movement is used for motor braking, and the other part is driven by the internal field effect of the controller to drive the power tube to be recharged back to the battery.

The disc brake of the electric vehicle is squeezed by the piston of the upper cylinder, and the brake fluid pushes the pressure to the piston of the lower pump of the disc brake, and the piston pushes the brake pad to "clamp" the brake disc, so as to achieve the effect of braking.

Because it is the principle of hydraulic pressure, and the force output of hydraulic pressure is very large, which is better than the effect of lever braking; The force is small, and the brake handle will not be tired for a long time; Since the disc has a small contact surface with the wheel, it will not conduct the heat of the brake disc to the wheel, which protects the wheel and the tire well.

Unlike drum brakes, which will heat up tires and burst accidents (cars have this kind of safety concerns, so the drum brakes of trucks have drip cooling brake drums), and the disc is exposed, and the air cooling of the disc is fast, etc., many benefits can be seen, disc brake is a good braking solution.

As for how to use the disc brake to damage it less, mechanically and technically: the adjustment of the brake cylinder, the brake pad must be in a straight line with the brake disc, not in a line, the brake pad will rub the disc, causing abnormal noise and wear, but also affect the power, too fast power consumption also affects the speed. On electrical appliances, you can choose a controller with the function of "point brake" (also known as electronic brake, also known as "ABS electronic brake").

It works by triggering the brake switch when you pinch the brake lever, so that the brakes are linked, even if your brake pads are not clamping the disc, it has resistance (the principle of back electromotive force). The method of inspection is simple, turn the electric "throttle" (accelerator handle) to make the rear wheel turn quickly.

You pinch the front wheel brake, the rear wheel will also stop rotating, this is the functional difference between "electronic brake" and manual brake, while the wear is minimal, the effect is very good, it brakes in order: electronic brake (soft deceleration) hydraulic brake.

It can be described as holding a disc between two fingers! The electric disc brake is divided into three parts, the brake disc, the steel disc on the wheel, the lower cylinder, the thing that clamps the brake disc, and the upper cylinder, a white oil box, next to the brake grip! The upper pump and the lower pump have oil pipes, and the brake pads in the lower pump clamp the brake disc by squeezing the oil of the upper pump by gripping!

The special oil for hydraulic disc brakes of electric vehicles is generally dot-3 or dot-4, and the composition must overcome the thermal expansion and cold contraction characteristics.

The brake fluid used should have the following characteristics: high temperature resistance, severe cold, high speed, damp heat; It is not corrosive to metal and non-metallic materials of the brake system; It can effectively lubricate the moving parts of the brake system and prolong the service life of the brake cylinder and leather bowl.

Summary. Hello! The disc brake of the electric vehicle is squeezed by the piston of the upper cylinder, and the brake fluid pushes the pressure to the piston of the lower pump of the disc brake, and the piston pushes the brake pad to "clamp" the brake disc, so as to achieve the effect of braking.

What does the disc brake principle look like on an electric car? Beg**.

Hello! The disc brake of the electric vehicle is squeezed by the piston of the upper pump and the dynamic fluid is pressed by Wang Zheng, and the dynamic fluid of Lingyuan is made to push the pressure to the piston of the disc brake lower pump, and the piston pushes the brake pad to "clamp" the brake disc, so as to achieve the effect of braking.

The disc brake of the electric trap motor car is to squeeze the brake fluid through the piston of the upper pump, and the brake ruler and fluid will push the pressure to the piston of the disc brake lower pump, and the piston will push the brake pad to "clamp" the brake disc, so as to achieve the effect of braking.

The working principle of its number is that when you pinch the brake handle, the brake switch is triggered, so that the brake is linked, even if your brake pads are not clamped on the disc, it has resistance (the principle of back electromotive force).

Hope it helps! Thank you!

Hydraulic disc brakes are lighter and more reliable.