Characteristics of the distribution of braking forces.
1 - pressure in the rear brake lines, 2 - pressure in the lines of the front brakes, 3 - ideal distribution, 4 - switch point of the brake force distribution valve, 5 - switch point of the EBD, 6 - constant (unchanged) distribution.
Anti-Lock Braking System (ABS)
1. Anti-lock brake system (ABS) controls the pressure in the brake circuits of all four wheels, preventing wheel blocking.
ABS allows:
- with a high degree of confidence to go around the obstacle, even in the event of emergency braking;
- stop the car during emergency braking while maintaining controllability and stability on the road, even with a curved trajectory.
2. The main function of the ABS system is to ensure vehicle stability and controllability. However, the system cannot prevent the vehicle from skidding if the cornering speed limit is exceeded.
3. The ABS system consists of a hydraulic unit and an electronic ABS control unit), brake master cylinder with vacuum booster and wheel speed sensors.
4. Receiving signals from all sensors during braking, the electronic control unit determines which of the wheels is on the verge of blocking. At this moment, the electronic control unit actuates the corresponding solenoid valve in the hydraulic unit to provide the required pressure in the brake circuit of the corresponding wheel.
5. The electronic control unit has the functions of self-diagnosis and emergency operation. If a malfunction is detected, the indicator on the instrument cluster lights up "ABS", and the corresponding fault code is entered into the memory of the control unit, then the system goes into emergency mode (deactivation of ABS, EBD, TCS systems).
6. Anti-lock brake system (ABS) turns on when the vehicle speed is more than 10 km/h and turns off when the speed is less than 5 km/h.
Electronic brake force distribution (EBD)
Attention: vehicles equipped with this system do not have a rear brake pressure regulator.
1. Application of electronic brake force distribution system (EBD) instead of using a brake force distribution valve depending on the load on the rear axle, it allows you to get an ideal distribution of pressure in the front and rear brake circuits. As a result, the rear wheels are prevented from locking up and the brakes are more effective.
2. Benefits of e-governance.
- A) Functional improvement of the parameters of the main braking system.
- b) Compensation for different wheel traction coefficients.
- V) No need to install a brake force distribution valve depending on the load on the rear axle.
- G) Fault indication.
3. The functions of the EBD system are performed by the ABS / EBD / TCS control unit.
Traction control (TCS)
1. Traction control (TCS) designed to automatically prevent wheel spin on roads with normal or slippery surfaces. When starting off, accelerating the vehicle or when cornering, excessive torque causes a rapid increase in the speed of one or all of the drive wheels. The TCS system maintains the slip of the drive wheels within an acceptable level and thus provides stable handling, improves directional stability and traction characteristics of the car.
2. The status of the TCS system is indicated by indicators "TCS" And "TCS-OFF", located on the instrument cluster.
3. The functions of the TCS system are performed by the ABS / EBD / TCS control unit.