Can LNG be added to CNG?
2 Answers
In principle, it is possible to add, but if a car chooses either LNG or CNG as fuel, the corresponding system will be installed. If you want to change the type of fuel for the car, it is best to first replace the corresponding gas injection system kit, because the kits required for installation on the car are different for each. The following is an introduction to the relevant knowledge about LNG and CNG: 1. Definition: Both LNG and CNG vehicles use natural gas as fuel and belong to clean energy vehicles. 2. Composition: The main component of the fuel is methane, and the two are very similar in terms of physical and chemical properties, fuel economy, and calorific value; the exhaust emissions basically do not contain sulfides or particulate matter.
As a seasoned driver of LNG (liquefied natural gas) vehicles, I'd like to share my experience. Many people ask me whether compressed natural gas can be directly filled into LNG tanks, and I think this is quite complicated. LNG is stored as a cryogenic liquid with low internal tank pressure and extremely low temperatures, while CNG is high-pressure gas. The significant pressure difference when filling could lead to leaks or even explosion risks. Last year at the garage, I saw someone attempt a similar modification, which resulted in the tank connection bursting and repair costs reaching tens of thousands. Personally, I believe it's better not to take such risks – vehicle designs determine fuel types, and modifications are not only expensive but also dangerous. To save money, it's best to stick with the original fuel system or consider switching to a dedicated CNG vehicle.