What are the power output characteristics of gas engines?

The power output characteristics of gas engines are a complex and worthy of in-depth research.

Firstly, from the perspective of torque characteristics. The torque output of a gas engine is to some extent related to its rotational speed. In the low-speed range, torque will increase rapidly with the increase of speed. This is because at lower speeds, the intake volume of gas and combustion efficiency can work together well, allowing the engine to generate sufficient force to push the load. After reaching a specific speed point, the growth rate of torque will gradually slow down. This is mainly limited by various factors such as the intake system and combustion speed. For example, in some industrial gas engines, torque growth begins to slow down when the speed reaches around 60% -70% of the rated speed.

Secondly, in terms of power output. Power is the product of torque and speed, and the power output curve of a gas engine usually shows an upward trend followed by a gentle one. At low speeds, although the torque increases, the power growth is relatively slow due to the low speed. As the speed increases, the torque also increases within a certain range, and the power will rapidly increase. As the speed further increases, the torque growth slows down, and the rate of power growth also decreases until it reaches the maximum power point of the engine. Afterwards, even if the speed continues to increase, the power will no longer increase due to the decrease in torque, and may even decrease due to factors such as mechanical wear and tear of the engine.

Furthermore, the power output of gas engines is also related to the load characteristics. When the load is light, the engine can easily maintain the speed, the power output is stable, and the output power can be quickly adjusted as needed. However, when facing heavier loads, the engine needs to output a larger torque to overcome resistance. If the load suddenly increases, the engine speed will temporarily decrease, and then the torque output can be increased by adjusting the gas supply to restore the speed to the appropriate range.

In addition, the power output of gas engines is also affected by the composition and quality of the gas. Different gases, such as natural gas, liquefied petroleum gas, etc., have different combustion characteristics. For example, the main component of natural gas, methane, burns relatively slowly, which makes the power output relatively stable; The slightly faster combustion speed of liquefied petroleum gas may make the response of power output more sensitive, but it also requires more precise control to avoid fluctuations in power output.