What is the function of the corrugated pipe in the engine compartment

The purpose of the bellows in the engine compartment is to：

1. Vibration and noise reduction. 2. Convenient installation and extended service life of exhaust silencing system. 3. Make the entire exhaust system flexible and cushioned.

Wire harness corrugated pipe refers to a tubular elastic sensitive component connected by foldable corrugated sheets along the folding and retracting direction. Generally, it is made of three common materials, namely polyethylene, PP, and PA, which play an important role in the external protection of the wiring harness. Its main characteristics are good wear resistance, high temperature resistance up to 150 degrees Celsius, and a certain degree of flexibility and good resistance to twisting. In general, corrugated pipes are both open and unopened, with flame retardant and non flame retardant types. They come in a variety of colors and specifications. Due to their excellent wear resistance, flame retardancy, and high temperature resistance, they are usually used for wiring protection in the engine compartment and floor.

Plastic wire corrugated pipes are used for protecting the engine compartment wiring harness. A large part of the wiring harness in the engine compartment is located on the engine body, and there are many sensors and actuators on top, which need to consider both fixation and harsh environment. Therefore, there are very high requirements for wire harness protection. To some extent, the wire harness protection level in the engine compartment represents the wire harness protection level of the entire vehicle. We need to consider multiple aspects such as waterproofing, insulation, and vibration. Therefore, high-temperature resistant corrugated pipes and industrial tape are generally used for packaging. The protection of the battery part is also a key point, as the battery harness is usually thick and should not be bent, so fixing is particularly important. Secondly, corrosion prevention and oxidation prevention are also indispensable. However, considering that the negative terminal has more insertion and extraction times than other parts, it is necessary to provide a certain amount of activity when wrapping to ensure durability.