Description
Overview of Core Functions
Firstly, the C2D37743 is a wear alarm sensor. Its core function is that when the brake pads wear to the safety limit, they will wear through a specific point on the induction wire, triggering a change in the circuit and thus lighting up an alarm light on the dashboard to remind the driver to replace the brake pads.
Detailed explanation of the materials of each component
For a more intuitive understanding, we can break down the entire induction wire into the following parts and explain their materials respectively:
1. Conductive core - internal wire
Main material: High-purity electrolytic copper
The reason is that copper is a good conductor of electricity with low resistance, which can ensure the stable and efficient transmission of electrical signals in wires. This is the basis for realizing its alarm function.
Process: It is usually made by twisting multiple strands of fine copper wire together, which gives it better flexibility to adapt to the intense vibrations in the engine compartment and near the wheels, avoiding breakage due to repeated bending.
2. Insulation and protective layer - Outer layer of the cable
This is the most crucial part because it needs to withstand extreme environments. It usually adopts a double or multi-layer insulation structure.
Inner insulation
Material: Heat-resistant polyethylene, modified PVC or thin-layer rubber.
Function: Basic insulation, isolating the copper core from the outside.
Outer insulation (main insulation layer) :
Material: Cross-linked polyethylene or silicone rubber.
Detailed introduction
High-temperature resistance: When the braking system is in operation, the temperature in the caliper and brake pad area can easily exceed 150℃, and even reach over 200℃. Ordinary PVC will soften and melt at this temperature. The long-term temperature resistance of XLPE and silicone rubber can reach 125℃ to 200℃, maintaining their physical and electrical properties.
Oil resistance: There may be brake fluid (such as DOT3/DOT4, which is corrosive) or grease around the braking system. XLPE and silicone rubber have excellent oil resistance and chemical medium resistance, preventing expansion and cracking due to corrosion.
Mechanical strength: It has a certain degree of wear resistance and compression resistance to cope with pulling during installation, vibration during vehicle operation, and impact from stones.
Flexibility: It remains soft even at low temperatures, facilitating wiring and installation in narrow engine compartments.
