What Are the Causes of Abnormal Noise During Emergency Braking?
2 Answers
When a vehicle brakes suddenly, the intense friction between the brake caliper and the brake disc can produce abnormal noise, possibly due to foreign objects on the brake disc causing the noise. Below is relevant information about the braking system: 1. Function: Ensures safe driving, increases driving speed, and improves productivity: To ensure safe driving, increase the average driving speed of the vehicle, and enhance transportation productivity. 2. Classification: (1) By function, it is divided into service brake system, parking brake system, and auxiliary brake system: ① The service brake system is operated by the driver using their foot, also known as the foot brake system. Its function is to decelerate a moving vehicle or bring it to a stop in the shortest distance possible. ② The parking brake system is operated by the driver using their hand, also known as the hand brake system. Its function is to keep a vehicle that has already stopped on various road surfaces stationary. ③ The auxiliary brake system is suitable for vehicles frequently driven in mountainous areas and for certain special purposes. It enhances driving safety and reduces the performance degradation of the service brake system and brake wear, stabilizing the vehicle speed during downhill driving. (2) By energy source, it is divided into manual brake system, power brake system, and servo brake system: ① The manual brake system uses the driver's physical strength as the sole energy source for braking. ② The power brake system relies entirely on the engine's power converted into potential energy in the form of air pressure or hydraulic pressure for braking. ③ The servo brake system combines both human power and engine power for braking.
I've been driving for over a decade and often encounter strange noises during sudden braking. Here are some summarized causes. The most common is brake pads worn to their limit, exposing the metal parts, which creates sharp squealing when rubbing against the rotor during sudden stops. If the brake disc surface is uneven, with scratches or rust, it can also produce squeaky sounds when braking. Issues with caliper components, such as rusted pins or stuck pistons, prevent smooth contact between pads and discs. Additionally, foreign objects like dust or small stones entering the braking system can cause temporary noises. Moreover, excessive moisture in brake fluid or significant temperature changes can also lead to noise. My advice: don’t ignore unusual sounds—delaying repairs can be risky. Prioritize checking the wear condition of pads and discs, and get them fixed promptly at a reliable shop. During routine maintenance, have the mechanic lubricate the braking system to prevent minor issues and ensure safety.
