Final answer:
The ABS configuration is defined by the location and number of wheel sensors and modulator valves used. The correct answer is b) Modulator.
Step-by-step explanation:
The correct answer is b) Modulator.
ABS (Anti-lock Braking System) configuration is defined by the location and number of wheel sensors and modulator valves used. The modulator valve is a crucial component of the ABS system as it regulates the hydraulic pressure in the brake lines to prevent wheel lock-up during braking.
It is responsible for modulating the brake pressure, causing the brakes to alternate between applying and releasing pressure, allowing the wheels to continue rotating and maintain stability while in motion. The modulator valve uses input from wheel speed sensors to detect any potential locking of the wheels and modulates the brake pressure accordingly.
For example, if a wheel speed sensor detects a wheel locking up, the modulator valve will decrease the hydraulic pressure to that particular wheel's brake caliper, preventing it from fully locking up and allowing the wheel to maintain traction with the road surface. This helps to improve braking effectiveness and vehicle control, especially in slippery or emergency situations.