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How to measure the safety factor of car brake pads?

Publish Time: 2025-01-08
Stability of friction coefficient: The friction coefficient is a key indicator for measuring the safety performance of car brake pads. High-quality car brake pads should be able to maintain a relatively stable friction coefficient under different temperature, humidity and vehicle speed conditions. For example, in a low-temperature environment, the friction coefficient cannot be too low, otherwise it will lead to a slow braking response; and in a high-temperature state, such as continuous braking, the friction coefficient cannot drop significantly, otherwise the braking efficiency will decline. A stable friction coefficient ensures reliable braking force under various road conditions.

Thermal decay performance: When the car is driving at high speed or braking frequently, the car brake pads will generate a lot of heat due to friction. The safety factor is measured by its thermal decay performance, that is, the degree to which the car brake pads maintain braking ability at high temperatures. Good car brake pads can effectively suppress thermal decay by adopting special material formulations and heat dissipation designs. For example, ceramic-based car brake pads have better thermal stability at high temperatures, and can maintain higher braking efficiency during long-term high-intensity braking compared to traditional asbestos car brake pads.

Wear rate: The wear rate of car brake pads is also closely related to safety. Wearing too fast not only increases replacement costs, but also means that braking performance will gradually decline. A lower wear rate indicates that the material of the car brake pads is wear-resistant and well matched with the brake disc. Generally speaking, the optimized friction material formula and advanced manufacturing process can reduce the wear rate, extend the service life and ensure driving safety while ensuring the braking effect of the car brake pads.

Thermal fatigue resistance: Frequent braking operations will cause the car brake pads to be subjected to alternating thermal stress, which is easy to cause thermal fatigue. Car brake pads with strong thermal fatigue resistance will not show cracks, peeling and other damage after multiple hot and cold cycles. This requires that the car brake pads material has good toughness and fatigue resistance to ensure that the braking performance is always stable during long-term use and avoid the risk of brake failure caused by thermal fatigue.

Braking response time: The braking response time directly affects the braking effect in an emergency. Car brake pads with a high safety factor have a very short time from stepping on the brake pedal to generating effective braking force. This requires precise coordination between the car brake pads and other parts of the brake system, such as smooth piston movement of the brake caliper and reasonable gap between the car brake pads and the brake disc, so as to achieve fast and sensitive braking response.

Noise and vibration level: Although noise and vibration are not directly equivalent to safety issues, abnormal noise and severe vibration may indicate that the car brake pads are faulty, such as uneven local wear and poor fit with the brake disc. Under normal circumstances, the noise and vibration generated by high-quality car brake pads during braking should be controlled at a low level, which also indirectly reflects its quality and safety.

Hazardous substance content: With the improvement of environmental awareness, the harmful substance content of car brake pads has also become part of the safety factor. Car brake pads may generate dust during braking. If they contain heavy metal harmful substances such as lead and cadmium, they will not only pollute the environment, but also may cause harm to human health. Car brake pads that meet environmental standards and have low harmful substance content can provide safer protection for drivers and the environment.
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