ABS uses speed sensors and valves controlled by a pump and controller to prevent wheels from locking up during braking. It works by quickly reducing and restoring brake pressure to wheels that are decelerating too fast through the use of pulses. There are different types of ABS that vary based on the number of wheels monitored, with four-channel ABS monitoring each wheel individually to provide the best braking control.

1. Anti-lock braking system
Abdalla Ahmed Zakaria

2. • ABS generally offers improved vehicle control
and decreases stopping distances .
• that allows the wheels on a motor vehicle to
maintain tractive contact with the road
• (i.e a tire spinning on ice ) .
• preventing the wheels from locking up .

3. Components
•
•
•
•
Speed sensors
Valves
Pump
Controller

5. operation
• Speed sensors detect fastly decelerating
wheels.
• The controller reduces the pressure on the
decelerating discs and gives it enough time to
decelerate.
• The valves open and close creating pulses
during braking.

6. operation

7. (ABS) types
• Four-channel, four-sensor ABS
Each wheel is monitored individually and gives best results.
• Three-channel, three-sensor ABS
For trucks and pickups with four wheels ABSonly one
sensor for rear wheels.
• One-channel, one-sensor ABS
• Pickups and trucks with one sensor on the rear axle.

8. Thank you