Why does the car still move forward after braking?
1 Answers
Modern cars are generally equipped with ABS anti-lock braking systems, so it's normal for the vehicle to move forward for a short distance after braking. The ABS (Anti-lock Braking System) detects impending wheel lock-up through sensors installed on the wheels. The controller then commands the modulator to reduce hydraulic pressure in the wheel cylinders, decreasing braking torque, before restoring the original pressure after a certain interval. This constant cycling (up to 5-10 times per second) keeps the wheels rotating while maintaining maximum braking torque. For vehicles without ABS, when the brake pedal is pressed hard during driving, the wheel speed decreases rapidly. If the braking force exceeds the friction between the tires and road surface, the wheels will lock up. Locked front wheels reduce tire-road friction, making it impossible for the driver to control the vehicle's direction. Locked rear wheels make the car prone to skidding.