Why is there a sound of grinding brake discs when the car starts?
1 Answers
There is a sound of grinding brake discs when the car starts because the friction material in the brake pads is too hard. Below is relevant information about brake pads: 1. Concept: A brake disc, simply put, is a round disc that rotates as the car moves. The brake caliper clamps the brake disc to generate braking force. When the brakes are applied, it clamps the brake disc to slow down or stop the car. Brake discs provide effective braking and are easier to maintain than drum brakes. 2. Function: Brake discs and pads certainly serve a braking function, with the braking force coming from the brake caliper. Generally, standard brake calipers have a fixed inner section where the brake piston pump is located, while the outer section is a clamp-like structure. The inner brake pad is fixed to the piston pump, and the outer brake pad is fixed to the outer part of the caliper. The piston is pushed by the pressure from the brake fluid line, moving the inner brake pad, while the reaction force pulls the caliper, causing the outer brake pad to move inward. Both pads press against the brake disc, generating braking force through friction between the disc and the inner and outer pads. In this process, the piston is pushed by brake fluid, also known as hydraulic oil, which is used to assist the engine. For the handbrake, a cable is used through a lever mechanism to forcibly pull the brake pads, pressing them against the brake disc to generate braking force.
