Diesel Data: Automotive Repair

System Operation

SYSTEM COMPONENT
The Anti-Lock Brake System (ABS) controls the hydraulic brake pressure of all four wheels during braking on hazardous road surfaces, preventing the wheels from locking up. ABS provides the following benefits:





1. Enables steering around obstacles with a greater degree of certainty, even during emergency braking.
2. Enables stopping during emergency braking while maintaining steering and stability.
If a malfunction occurs, a diagnosis function and fail-safe system are included for serviceability.
The hydraulic electronic control unit (HECU) receives signals about the vehicle's speed, direction and road conditions from sensors at the wheels.
Based on these signals, the control unit will determine the optimum amount of wheel spin.

EBD (ELECTRONIC BRAKE-FORCE DISTRIBUTION)
The EBD is additionally applied instead of the proportioning valve to make the ideal distribution of a fluid pressure to the front and rear brake to prevent the brakes from skidding in the event of rear wheel look and to obtain a higher brake efficiency within the range of service brake application.

ADVANTAGES
^ Function improvement of base-brake system
^ Compensation for different friction coefficients
^ Elimination of proportioning valve
^ Failure recognition by warning lamp





COMPARISON BETWEEN WITH P-VALVE AND WITH EBD