CNG, the abbreviation for Compressed Natural Gas, is used in vehicles.
It refers to natural gas stored in high-pressure gaseous form in vehicle cylinders, serving as a clean alternative to gasoline and diesel.
How it works: CNG vehicles are typically dual-fuel vehicles, capable of running on both natural gas and gasoline. The vehicle is equipped with a specialized high-pressure gas tank, a pressure reducer, and a gas injection system. The basic operating principle of the engine remains unchanged; the fuel is simply switched from liquid (gasoline) to gas (natural gas).
Key Advantages
Economical: Natural gas is typically much cheaper than gasoline and diesel, significantly reducing fuel costs. It's particularly suitable for commercial vehicles like taxis and buses, as well as high-mileage users.
Clean and Environmentally Friendly: Natural gas burns more completely, resulting in exhaust emissions including:
Carbon monoxide (CO) reduced by approximately 90%
Hydrocarbons (HC) reduced by approximately 50%
Nitrogen oxides (NOx) reduced by approximately 30%
Particulate matter (PM) and sulfur compound emissions are virtually zero
Carbon dioxide (CO₂) emissions are also lower than those of gasoline vehicles.
High Safety: CNG cylinders are manufactured to the highest quality standards and can withstand shocks far exceeding their operating pressure.
Natural gas has a high flash point (approximately 650°C) and is less dense than air. Any leak will diffuse upwards immediately, preventing accumulation and forming a flammable mixture.
Its explosive concentration range (5%-15%) is also narrower than gasoline (1.3%-7.6%), making it relatively safer.
