Rolling wheels & lockedup wheels
Concept of ABS
ABS System Channels
ABS Configurations:
Integral ABS System
NonIntegral ABS System
Components of ABS:
Wheel speed sensors
   • 02 ABS Wheel Speed Sensor  
ABS electronic control unit ECU
   • 03 ABS Electronic Control Unit  
ABS Hydraulic control unit or modulator
   • 04 ABS Hydraulic Modulator Types &  C...  
ABS warning light

0:00 Introduction
0:32 Tire Tread
0:57 Tire Contact Patch on a road
1:11 Traction
2:03 Rolling tire (static friction)
2:09 Rolling wheels
2:18 A rotating tire has 0% slip
2:31 A lockedup wheel has 100% slip
2:39 Normal Braking
2:49 Locking wheels
2:59 Locked tire (kinetic friction)
3:22 The Consequences of Wheels Locking
3:33 Tire Slip
4:07 Wheel Slip vs. Vehicle Stability
5:55 ABS Unit Location
6:07 ABS System Channels
6:38 OneChannel ABS System
6:58 ThreeChannel ABS System
7:13 FourChannel ABS System
8:21 NonIntegral ABS System
8:53 ABS Components