What Are the Reasons for Poor Acceleration in Natural Gas Vehicles?

[DelPeyton]

Poor acceleration in natural gas vehicles, which refers to a decrease in power output, is primarily due to the characteristics of the fuel itself and the construction of the engine. Regarding fuel properties: Gasoline is a liquid fuel, while natural gas is a gaseous fuel. When using gasoline, the volume of liquid gasoline is almost negligible compared to the intake volume. However, when using natural gas as fuel, the volume of the fuel itself occupies a significant proportion of the total intake, leading to a reduction in the amount of air entering the cylinders and a decrease in the volumetric efficiency, which consequently results in a drop in engine power. Regarding engine construction: The main factor determining engine power is the compression ratio of the engine. The higher the compression ratio, the greater the thermal efficiency and the effective power. At the same time, a higher compression ratio also increases the tendency for engine knocking. Therefore, the engine's compression ratio must also be compatible with the fuel's anti-knock properties.