Automatic Breaking System or abs

1. Automatic Braking System
● Group Members
● Khan Airaf
● Khan Gufran
● Khan Jishan
● Khan Noorullah
● Khan Sameer

2. PPT Outline
● What is ABS?
● Overview
● How Does ABS Work?
● Components Of ABS
● Comparison
● Advantages Of ABS
● Disadvantages of ABS
● Conclusion
● Reference

3. What is ABS ?
● An Automatic–Braking System (ABS) is an automobile safety system that
allows the wheels on a motor vehicle to maintain tractive contact with the
road surface according to driver inputs while braking, preventing the
wheels from locking up (ceasing rotation) and avoiding uncontrolled
skidding.

4. Overview Of ABS
● Automatic – Braking system are designed to maintain driver control and
stability of the car during emergency brake.
● Locked wheel will slow down the car but will not provide steering ability.
● ABS allows maximum braking to be applied while retaining the ability to
‘Steer out of trouble’.
● The operation of ABS can slightly reduce stopping distance in some cases
like on wet roads surfaces,but it can increase the stopping distance in
others,as may be the case in deep snow or gravel.

5. How does ABS work?
● ABS uses wheel speed sensors to determine if one or more wheels are
trying to lock up during braking. If a wheel tries to lock up, a series of
hydraulic valves limit or reduce the braking on that wheel. This prevents
skidding and allows you to maintain steering control

7. Components of ABS
● Wheel Speed Sensor
● Electronic Control Unit
● Hydraulic Control Unit
● Brake master Cylinder

8. a. Wheel Speed Sensor
● A wheel speed sensor or vehicle speed sensor (VSS) is a type
of Tachometer. It is a sender device used for reading the speed of a
vehicle's wheel rotation. It usually consists of a toothed ring and pickup.
● Wheel speed sensors are in Automatic-braking systems in conjunction with
the Electronic Stability Control system.

9. b. Electronic Control Unit
● In automotive electronics, electronic control unit (ECU) is a generic term
for any embedded system that controls one or more of the electrical
system or subsystems in a motor vehicle.

10. c. Hydraulic Control Unit
● The hydraulic control unit, or modulator, executes commands in the form
of electrical signals from the ABS Control Module.
● It uses solenoid valves to change the hydraulic pressure in the brake
circuit.
● The fifth line far right is from the brake master cylinder which is
connected to brake pedal

11. d. Brake Master Cylinder
● The master cylinder converts the mechanical force from the brake pedal
into hydraulic pressure. When the brake pedal is depressed, the master
cylinder piston moves forward and pushes the brake fluid ahead of it.

12. Comparison

13. Advantages of ABS
● It allows the driver to maintain directional stability and control over
steering during braking
● Safe and effective
● Automatically changes the brake fluid pressure at each wheel to maintain
optimum brake performance.
● ABS absorbs unwanted turbulence shock wave and modulate the pulse thus
permitting the wheel to continue turning under maximum braking pressure.
● A driver without experience can drive ABS vehicle effectively, than an
experienced driver on the non ABS vehicle.

14. Disadvantages of ABS
● It is very costly.
● Maintenence cost of a car equipped with ABS is more.
● On concrete roads, the ABS vehicle stopping distance might be needed
more.

15. Conclusion
● Statistics show that approximately 40% of auto mobile accident are due to
skidding.
● The problem commonly occur on vehicle with conventional brake system
which can be avoided by adding device called “ABS”.
● If there is an ABS failure, the system will revert to normal brake
operation.Normally the Abs warning light will turn on and let the driver
know there is a fault .

16. Reference
● Google
● Wikipedia
● Slideshare