The ABS System
The theory behind anti-lock brakes is simple. A skidding wheel (where the tire contact patch is sliding relative to the road) has less traction than a non-skidding wheel. If you have been stuck on ice, you know that if your wheels are spinning you have no traction. This is because the contact patch is sliding relative to the ice (see Brakes: How Friction Works for more). By keeping the wheels from skidding while you slow down, anti-lock brakes benefit you in two ways: You'll stop faster, and you'll be able to steer while you stop.
There are four main components to an ABS system:
- Speed sensors
- Pump
- Valves
- Controller
![]() Anti-lock brake pump and valves |
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Come and visits at
| Run Fine Auto Center 4185 College Ave. |
| San Diego |
| CA |
| 92115 |
|
USA 619.229.1882 |
Brakes services



