Does the car change natural gas to the engine?
The application of natural gas vehicles is still in its infancy, and the supply of natural gas is not as popular as gasoline. In this case, it is difficult to popularize the specially designed natural gas engine vehicles. At present, most of the natural gas vehicles put into operation are dual purpose fuel vehicles, which can be used either natural or gasoline. The dual purpose fuel vehicle has less or no increase in compression ratio in order to make use of gasoline. Therefore, the high antiknock performance of natural gas has not been fully exploited, leading to the decline of engine power.
In the aspect of engine structure, the main factor that determines the engine power is the compression ratio of the engine. The greater the compression ratio, the higher the thermal efficiency, the greater the effective power. At the same time, the greater the compression ratio, the greater the tendency of the engine to knock. Therefore, the engine compression ratio must also be adapted to the antiknock performance of the fuel. The antiknock performance of gasoline determines that the compression ratio of gasoline engine can not be too large, but the antiknock ability of natural gas is very good, and it can be used to compress relatively large engine, thus increasing its power.
In the nature of fuel, gasoline is a liquid fuel, while natural gas is a gaseous fuel. The use of gasoline, and the volume of the air intake volume of liquid gasoline compared to almost negligible, but the use of natural gas as fuel, fuel volume occupies a large proportion in the whole intake, resulting in the amount of air entering the cylinder is reduced, air coefficient decreased, resulting in reduction of engine power.
One of the main problems in the use of natural gas vehicles is that the power of the engine is significantly lower than that of gasoline. According to data reports, the use of natural gas as fuel in the car, power is generally down, natural gas car power decline mainly due to the characteristics of the fuel itself and the structure of the engine.
