With the increasing complexity of automotive electronic systems, automotive electronic components have an ever - growing need for reliable protection. Silicone oil, with its excellent electrical properties, chemical stability, and physical characteristics, provides comprehensive and effective protection for automotive electronic components.

1. Printed Circuit Board (PCB) Protection

• Silicone Coating Material：On the printed circuit board (PCB) of a vehicle, coating with silicone oil is a common protective measure. The silicone coating material used for PCB protection is usually a low - viscosity, high - purity silicone oil, added with some special additives to enhance its adhesion, weather resistance, and other properties. During the production process, the silicone coating material is evenly coated on the PCB surface through spraying, dipping, and other processes.
• Protection Mechanism：First, silicone oil has good moisture - proof performance and can form a continuous waterproof film on the PCB surface, effectively preventing the intrusion of humid air and moisture. During the vehicle's driving, especially in humid environments, moisture may penetrate into the vehicle and damage the PCB, causing short - circuits and other faults. The silicone coating can act like an umbrella, protecting the PCB from moisture. Second, silicone oil also has excellent dust - proof performance, making it difficult for dust and other particles to adhere to the PCB surface, keeping the circuit board clean. In addition, silicone oil has excellent electrical insulation properties, which will not affect the electrical signal transmission between electronic components on the PCB. At the same time, it can prevent short - circuits caused by accidental contact between different circuits, ensuring the stable operation of the electronic system.

2. Electronic Sensor Protection

• Silicone Buffer and Heat Dissipation Material：For various sensitive electronic sensors in a vehicle, such as tire pressure sensors and temperature sensors, silicone oil plays multiple roles in protection. On the one hand, silicone oil can be used as a buffer material to protect the sensors from external impacts and vibrations. During the sensor packaging process, an appropriate amount of silicone oil is filled inside, filling the gaps between the sensor chip and the housing.
• Buffer and Heat Dissipation Principle：When the vehicle is driving on bumpy roads or subjected to external impacts, the silicone oil can absorb and disperse the impact force, like a soft sponge, protecting the sensor chip from being damaged by severe vibrations. On the other hand, silicone oil has good thermal conductivity and can help the sensor dissipate heat. During the sensor's operation, it generates a certain amount of heat. If the heat cannot be dissipated in time, it may affect the accuracy and service life of the sensor. Silicone oil can quickly transfer the heat generated by the sensor chip to the housing and then dissipate it into the surrounding environment through the housing, ensuring that the sensor works within an appropriate temperature range and guaranteeing the accuracy and reliability of its data.