Vacuum booster
The vacuum booster increases the pressure generated by the driver when the brake pedal is depressed. The booster only works when the engine is running.
When the vacuum booster does not work, for example, when the vehicle is towed or the booster malfunctions, it is necessary to press the brake pedal harder than usual.
Emergency brake booster (BAS)
In a dangerous situation, most drivers brake in a timely manner, but not with the maximum possible pressure on the brake pedal.
Emergency brake booster action: When the driver depresses the brake pedal hard, this is recognized by the booster as an emergency. The booster in a short time creates the maximum pressure in the brake system in order to activate the anti-lock braking system as quickly and efficiently as possible and shorten the braking distance.
Do not reduce the pressure on the brake pedal, because as soon as the brake pedal is released, the emergency brake booster stops working.
Anti-lock braking system (ABS)
NOTE: The anti-lock braking system prevents the wheels from locking when braking.
Anti-lock braking system (ABS) significantly increases the degree of active safety of the car.
ABS action
When a wheel starts to lock up when the vehicle is braking, the pressure in the brake mechanism of that wheel is reduced. This process can be seen by some pulsation of the brake pedal, accompanied by a characteristic sound. The driver now knows that the wheels are prone to blocking, and the ABS prevents this process. For normal operation of the ABS, do not «pumping up» foot movement - keep the brake pedal constantly depressed.
During emergency braking on a slippery road, control over the movement of the vehicle is possible, as far as the road conditions are concerned, since the wheels do not block.
However, one should not hope that ABS in any condition of the road surface will be able to shorten the braking distance. On gravel or fresh snow, braking distances can even increase.
Remember that the ABS action changes somewhat when the transmission is downshifted «LOW».
ESP anti-skid system
NOTE: Anti-skid system (electronic stabilization system - ESP) Reduces the likelihood of car skidding and skidding.
The anti-skid system works in conjunction with the anti-lock braking system, traction control and traction control.
The action of the anti-skid system
This system reduces the likelihood of a vehicle skidding or skidding by braking individual wheels.
Based on steering and speed data, the direction in which the driver intends to move is determined and compared with the behavior of the car. When the car begins to drift or skid, the system automatically brakes a certain wheel.
The vehicle then returns to a state of dynamic stability. When the car is oversteered (desire to skid the rear of the car) and understeer (the desire to demolish the front of the car out of the turn) full control over the movement of the car is achieved.
Operation of the traction control system (ASR)
This system prevents the drive wheels from spinning during hard accelerations by reducing the power developed by the engine. At all speeds, the system works in conjunction with the ABS. When the ABS fails, the operation of this system is also disrupted. Thanks to this system, under certain conditions, it becomes possible to start from a standstill, accelerate quickly or move uphill.
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