What is the primary use of CNG in engine fuel systems?

The primary use of CNG, or compressed natural gas, in engine fuel systems is as an alternative to gasoline or diesel fuel. CNG is utilized because it provides a cleaner-burning option compared to traditional fossil fuels. It emits lower levels of harmful pollutants such as carbon monoxide, nitrogen oxides, and particulate matter, which contributes to improved air quality. Additionally, CNG is often seen as a more sustainable fuel choice, with natural gas being an abundant resource that can help reduce dependency on oil.

Using CNG in engine fuel systems also comes with operational benefits, such as lower fuel costs and the ability to utilize existing infrastructure in some areas for refueling. This makes CNG a practical choice for commercial fleets and public transportation systems looking to reduce their environmental impact while maintaining performance.

Other options, like using CNG as a primary source of electricity, are not accurate; while natural gas can be used for generating electricity, CNG specifically refers to its use as a fuel for vehicles. Similarly, while CNG has various applications in manufacturing, such as for plastics, its role in engine fuel systems is distinctly as an alternative fuel. Finally, describing CNG as a cleaning agent for engines does not relate to its primary function in engine fuel systems, where it