What are the four main components of an ABS system?

The four main components of an Anti-lock Braking System (ABS) are indeed the speed sensor, pump, valve, and controller.

The speed sensor monitors the rotational speed of each wheel and sends this information to the ABS controller. If the system detects that one or more wheels are about to lock up during heavy braking, it activates the pump to maintain pressure in the brake lines. The valve plays a crucial role in regulating brake fluid flow to each wheel, allowing for precise modulation of braking force. Finally, the controller processes the data from the speed sensors and controls the operation of the pump and valves to prevent wheel lock-up, thereby enhancing vehicle control and safety.

This configuration of components is specifically designed to improve braking performance during emergency situations or on slippery surfaces, making the correct choice vital to understanding how an ABS functions effectively. Understanding these components and their roles helps in grasping tire interactions and vehicle stability while braking.