What happens to the brake calipers when pressurized fluid is delivered?

When pressurized fluid is delivered to the brake calipers, it results in the application of the brake pads against the brake rotor. This action occurs due to the hydraulic principle used in braking systems, where fluid pressure is transferred to the calipers, causing them to move and engage the brake pads. The hydraulic fluid pushes the caliper pistons, thus forcing the brake pads closer to the rotor, effectively creating the friction needed to slow down or stop the vehicle. This process is essential for effective braking performance and illustrates how hydraulic systems operate to amplify force applied by the driver’s foot on the brake pedal.