Which cars are suitable for retrofitting with CNG?

1、 The working principle of a car mainly discusses the engine

A gasoline engine is an engine that uses gasoline as fuel to convert internal energy into kinetic energy. Due to the low viscosity and fast evaporation of gasoline, a gasoline injection system can be used to inject gasoline into the cylinder. After compression to a certain temperature and pressure, it can be ignited with a spark plug to expand the gas and do work. Gasoline engines are widely used in automobiles, especially in small cars.

The fundamental difference is that the engine is different, and its working principle is very different. Diesel engines are compression ignition type, with an ignition point of 220 ℃; The gasoline engine is a spark ignition type, with an ignition point of 427 ℃; And natural gas is ignited, with an ignition point of 650 ℃. Fuel engines (such as cars) are driven by pistons and cylinders. Gas engines (thermal power generation) are engines that inject gas onto a turbine to drive it to rotate. Here we understand a problem: diesel engines are different from natural gas engines, while gasoline engines are similar to natural gas engines. So diesel engines are not suitable for modification. But there are those in the market who claim to modify diesel engine cars, either by modifying the engine or by switching to hybrid combustion, and cannot use gas alone; One is that it does not comply with vehicle management regulations, and the other is that the cost-effectiveness is not high, so it is not recommended to try.

2、 What parts are being modified?

Generally, the original fuel system is retained and a gas system is installed. Conduct professional debugging to adapt to the principles and characteristics of the original fuel engine. Especially CNG cylinders require storage space in the trunk. I understand a problem here: cars that use a lot of trunk space are not suitable for converting to CNG. Long distance travel is not suitable for modification.

3、 What is the purpose of the modification? 

It must be for saving money, energy conservation and environmental protection.I understand a problem here: high-value, high-end cars are not suitable for modification; A car that has been scrapped is not suitable for modification; The new car is not suitable for modification.

4、 Car models that are not suitable for modification

Turbocharged engines, direct injection engines, off-road vehicles and high displacement vehicles, vehicles in poor condition, diesel engines, and so on.

5、 Suitable car models for modification

1. Gasoline engine

2. Price within 200000 yuan

3. The car is around 3-5 years old

4. Annual mileage greater than 20000 kilometers

Refer to：https://www.atbs.com/post/5-things-you-need-to-know-before-switching-to-cng
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