Contents: Electronic Brakeforce Distribution…⇓ Benefits of Electronic Governance ⇓ Comparison of brake force…⇓ Checking the hydraulic and…⇓ ABS Electronic Control Unit (HECU)…⇓
The Anti-lock Braking System (ABS) controls the brake pressure on all wheels to prevent the wheels from locking under heavy braking. ABS provides:
- vehicle controllability during emergency braking;
- stopping the vehicle during emergency braking without deviating from the chosen trajectory of movement.
If a fault is detected in the system, fault diagnostics are performed and the safety mode is activated, and the braking system operates as standard.
The hydraulic and electronic control unit receives signals from vehicle speed sensors, road surface conditions, direction of travel and wheel speed.
The electronic control unit determines the optimal wheel speed.
Electronic Brakeforce Distribution (EBD)
The use of electronic brake force distribution, compared to the installation of a proportional valve, ensures ideal pressure distribution in the front and rear brake circuits. As a result, braking efficiency is significantly increased and locking of the rear wheels is prevented.
Benefits of Electronic Governance
Functional improvement of the parameters of the main braking system.
Compensation for different coefficients of wheel-road adhesion.
Elimination of the installation of a proportional valve.
Indication of faults by means of a control lamp.
Comparison of brake force distribution characteristics
Fig. 6.63. Comparative characteristics of the distribution of braking forces
Comparative characteristics of the distribution of braking forces are shown in Fig. 6.63.
Checking the hydraulic and electronic control unit of ABS
Checking the hydraulic and electronic unit (ABS) see table 6.7.
ABS Electronic Control Unit (HECU) Input/Output Wiring Diagram
Fig. 6.64. ABS electronic control unit connector
Fig. 6.65. Input/output diagram of the ABS electronic control unit
The input-output diagram of the ABS electronic control unit is shown in Fig. 6.65.