What is the primary purpose of rubber insulators in a CNG system?

The primary purpose of rubber insulators in a CNG system is to minimize fretting corrosion between the cylinder and the mounting system. This type of corrosion can occur due to the vibrations and movements during vehicle operation, which might lead to wear and damage over time. By using rubber insulators, the interface between the CNG cylinder and its mounts is cushioned, reducing the direct contact and movement that could otherwise lead to fretting. This helps maintain the integrity and longevity of both the mounting system and the cylinder, ensuring safe operation and reducing maintenance needs.

Other options touch on aspects that do not relate directly to the functional role of rubber insulators in a CNG system. While improving vehicle speed and performance or enhancing aesthetic appeal are valuable in some vehicle design discussions, they do not pertain to the specific mechanical function of insulators. Electrical insulation could be a consideration in broader vehicle electrical systems, but it is not the primary purpose of rubber insulators in the specific context of a CNG system.