1. Hydroelectronic control unit of the anti-lock braking system
2. Front wheel speed sensor
3. Rear wheel speed sensor
4. Longitudinal acceleration sensor (4 WD only)
5. Parking brake/EBD indicator lamp
6. Anti-lock brake system indicator light
The anti-lock braking system (ABS) is used to regulate the pressure in the brake mechanisms of all wheels when braking in difficult road conditions, preventing wheel locking. ABS provides the following benefits:
1. Avoiding obstacles with a higher degree of safety, including during emergency braking.
2. Reducing the braking distance during emergency braking while maintaining vehicle stability and control, including when turning.
In case of system failure, a diagnostic function and a fail-safe system are provided.
Traction control system (TCS) is a variable system designed to regulate traction during acceleration or cornering. The system controls the vehicle's movement by braking one of the vehicle's wheels or by suppressing excess engine power, so that the vehicle does not skid and maintains directional stability.
The hydroelectronic control unit (HECU) receives information about the vehicle speed, direction of travel and road conditions from the wheel speed sensors.
Based on this information, the control unit determines the optimal wheel braking mode.
The Electronic Brakeforce Distribution (EBDF) system is a subsystem of the ABS and serves to ensure effective traction of the rear wheels.
In addition, based on the high efficiency of the perfect ABS, the ERTS prevents skidding of the rear wheels under partial braking conditions.
The braking force is maintained close to the optimum value and is regulated electronically, which eliminates the need for a conventional pressure regulator. Since the pressure regulator is a mechanical device, it has limitations in terms of achieving ideal distribution of braking force to the rear wheels, as well as flexible distribution of forces depending on the degree of vehicle loading. In addition, if the mechanical pressure regulator is faulty, it is not detected by the driver.
The ERTS, controlled by the ABS electronic brake control unit, calculates the slippage of each wheel at any given moment and regulates the pressure in the rear brakes so that it exceeds the pressure in the front brakes. If the ERTS malfunctions, the ERTS (EBD) (and parking brake) indicator lamp lights up in the instrument cluster.
Advantages of ERTS:
- Improving the performance of the basic braking system.
- Compensation for differences in friction coefficients.
- Elimination of pressure regulator.
- Malfunction signaling by control lamp.
Attention. Any work related to diagnostics and repair of the anti-lock braking system (ABS) should be carried out only at specialized service stations by qualified specialists, since this is directly related to road safety.