In the ABS system, is it dangerous for the front wheels to lock up before the rear wheels or for the

Cars with ABS generally do not have a lock-up situation. Front-wheel locking is more dangerous. If the front wheels lock up before the rear wheels, the car will lose its ability to steer.

There is no way to change the direction of travel. If the rear wheels lock up before the front wheels, then it will cause side slip. So locking up is very dangerous.

The installation of ABS is to solve the problem of wheel locking when braking, and the car without ABS is installed, if you press the brake pedal hard while driving.

The wheel speed decreases rapidly when the braking force exceeds the friction between the wheel and the ground.

If the front wheel is locked, the driver cannot control the direction of the vehicle, and if the rear wheel is locked, it is very easy to slip. Cars equipped with ABS are installed by installing them on each wheel or propeller shaft in case of emergency.

The speed sensor on the wheel constantly checks the speed of each wheel, calculates the wheel slip rate at that time by the computer (by the slip rate to understand whether the car wheel has been locked), and compares with the ideal slip rate, makes the decision to increase or decrease the brake pressure, the controller directs the regulator to reduce the oil pressure of the wheel brake cylinder, reduces the braking torque, after a certain period of time, and then restores the original oil pressure, and constantly circulates like this (up to 5 10 times per second), Always keep the wheels in rotation and have the maximum braking torque. Therefore, the ABS device can make the wheels always maintain the rolling state with slight slip and braking, without locking, so as to improve the braking efficiency.

ABS braking system is a point brake way of braking, and there will be no brake pads lock the brake disc, if it is locked, ABS is not working or damaged.

When ABS works normally, there will be no locking, when it fails, the emergency braking braking force is too strong, there may be locking, when only the front wheels are locked, there will be steering failure, the car can only go straight along the tangent direction, when only the rear wheels are locked, the car will have a tail flick, and the emergency braking generally appears on the high-speed straight road, so the tail flick is more dangerous.

The ABS anti-lock braking system is to automatically control the size of the braking force of the brake when the car is braking, so that the wheels of the car are not locked and are slid while rolling.

A (slip rate is about 20%), in order to ensure that the adhesion between the wheel and the ground is at the maximum.

ABS controls the pressure of the brake line acting on the wheel brake cylinder, so that the wheels of the car will not lock during emergency braking, so that the car can still maintain good directional stability during emergency braking.

On a car that is not equipped with ABS, the car can easily lose directional stability if braking on snow; At the same time, if the driver wants to stop, he must use a hydraulic regulator (also known as an actuator). Conversely, if the car is equipped with ABS, the ABS can automatically issue control commands to the hydraulic regulator, so that the brakes can be controlled more quickly, accurately and effectively.

Write out the situation that the front wheel locks up first and the rear wheel locks first during braking for a vehicle without ABS system, and divide them.

Hello dear! <>

Vehicles without ABS system in the braking process first appear front wheel SI and Sesong first appear rear wheel SI in the braking process, divided into: ABS car generally does not have the situation of SI. The front wheel hugging si is more dangerous and dangerous.

If the front wheels hold the SI before the rear wheels, the car will lose its ability to steer. There is no way to change the direction of travel. If the rear wheel holds the SI before the front wheel, it will cause side slip.

So it is very dangerous to hold si. The car without ABS is installed, press the brake pedal hard while driving, the wheel speed will decrease rapidly, when the braking force exceeds the friction between the wheel and the ground, the wheel will be held si, the wheel that completely holds the si will increase the friction between the tire and the ground sharply, the front wheel is held si, the driver can not control the direction of the vehicle, and the rear wheel is hugged si, it is very easy to slip sideways.

Hello Features of ABS anti-lock braking system: prevent the vehicle from braking wheels on high-speed emergency braking, braking wheels on ice and snow roads, and sliding traffic accidents!

The antilockbrake system (ABS) is an anti-lock brake system (ABS), in which a speed sensor is placed on each wheel, and the signal about the speed of each wheel is input into the electronic rolling control device. The electronic control device monitors and judges the motion status of each wheel according to the signal input from each wheel rotation sensor, and forms the corresponding control instructions.

Function: When the car brakes, automatically control the size of the braking force of the brake, so that the wheels are not locked, and are in a state of rolling and slipping (slip rate is about 20%), so as to ensure that the adhesion between the wheels and the ground is at the maximum.

Locking: The car is equipped with wheels when taking emergency braking in an emergency, which is prone to tire locking and the steering wheel cannot turn.

Summary. Hello dear, if the front wheels lock first or the rear wheels lock first when the car brakes, it is relatively safe for the rear wheels to lock. The hazards of wheel locking are as follows:

1. The wheel locking causes the tire to slip locally with the ground, which greatly reduces the service life of the tire; 2. On the road surface with asymmetrical adhesion coefficient, the car will lose the stability of straight driving, and dangerous phenomena such as side slippage and sharp tail turn will occur; 3. The front wheels are locked, the vehicle loses its steering ability and cannot be steered, and the pedestrian who avoids obstacles is locked up, and the rear wheels are locked, and the vehicle loses stability, resulting in side skidding.

Hello dear, if the front wheels lock first or the rear wheels lock first when the car brakes, it is relatively safe for the rear wheels to lock. The hazards of wheel locking are as follows: 1. Wheel locking leads to partial tire slippage with the ground, and the service life of the tire is greatly reduced; 2. In the asymmetrical adhesion coefficient of the road surface bending, the car will lose the stability of straight driving, and dangerous phenomena such as side slippage and sharp tail turn will occur; 3. The front wheel is locked, the vehicle loses its steering ability, cannot realize the steering, and the pedestrian who avoids the obstacle is locked, and the rear Wuyuan wheel is locked, and the vehicle loses stability, resulting in side skidding.

Introduction: Tire locking refers to the sudden braking when stepping on the brakes, and the vehicle loses its ability to steer, which generally appears in vehicles without ABS anti-lock brakes. 2. Phenomenon:

The car without ABS is installed, if you press the brake pedal hard while driving, the wheel speed will decrease rapidly, when the braking force exceeds the friction between the wheel and the ground, the wheel will be locked, and the completely locked wheel will increase the friction between the tire and the ground, and it may lead to side slip high imitation early and lose control of the direction under greater inertia. If the front wheels are locked, the driver will not be able to control the direction of the vehicle, and if the rear wheels are locked, it is prone to side skidding.

Why is it easy for a car to slip if it brakes sharply when turning?

Under normal conditions, when the vehicle encounters an emergency such as an accident in front of it, it should not slide sideways when braking suddenly, but in an emergency, the knee-jerk reaction of the brother silver may allow the driver to adjust the direction to avoid colliding with the front, so it will form an operation of hitting the steering wheel to one side and braking at the same time. As a result, the body will slip due to unbalanced weight in the front and rear.

Short answer: There is no accident, why is it easy for a car to skid, when braking sharply when turning.

The main reason is that it is impossible to drive when driving, and the tires have always been in the same direction as the inertia of the car. The front wheel locks up again when braking suddenly, so it is easy to slip sideways.

How to reduce the braking distance.

The sliding friction of the car is fast, which can reasonably reduce the braking spacing. But this kind of is not as good as your safe driving habits, do a good job of distinguishing in advance, don't get too close to the car, especially in muddy rainy days, because the braking distance will be much higher than usual, the car will slide to accompany the virtual distance.

Dangerous locking of the front wheels. Because the front wheel is locked, you can't control the direction, and the rear wheel is nothing more than dragging the tires.

The front wheel brake is locked, that is, when the car is braking, the front wheel is not rolling, but sliding due to the excessive force of applying the brakes. This is very dangerous in an emergency, because the front wheels are sliding (i.e. locked) before hitting the steering wheel.

is almost ineffective. The right vehicle can be fitted with an ABS (Anti-lock Braking System) to prevent this from happening.

When ABS works normally, there will be no locking, when it fails, the emergency braking braking force is too strong, there may be locking, when only the front wheels are locked, there will be steering failure, the car can only go straight along the tangent direction, when only the rear wheels are locked, the car will have a tail flick, and the emergency braking generally appears on the high-speed straight road, so the tail flick is more dangerous.

Then the ABS system works. According to the system theory, there is no lock-up phenomenon, and it brakes the braking system at dozens of beats per second. It can be said that the point brake is amplified.

Without the intervention of ABS. In the case of locking, the danger of locking the front wheels is much higher. The front wheels are used as guide wheels.

It is locked, whether it is rolling friction or sliding friction, which is not good for guidance.

When the rear wheels of the vehicle are locked, the rear wheels will lose lateral adhesion, such as the road is uneven or the adhesion on both sides is inconsistent, the rear wheels will slip, unless you have a high skill, otherwise the car will not be under your control, but in the case of the front wheels locked first, even if the adhesion on both sides is inconsistent, the car will only continue to drag forward, and will not skid. But no matter what kind of locking is very dangerous, that's why the ABS system appeared.

To put it simply, the system monitors in real time, and when a wheel is about to lock, it will control which wheel to suppress it from locking.

Under normal circumstances, there is no possibility of locking.