During the operation of a gas engine, the fuel consumption is influenced by many factors, which are interrelated and jointly determine the actual fuel consumption.

　　The structure and performance parameters of the engine itself are the fundamental factors affecting fuel consumption. The compression ratio, as one of the key parameters, has a significant impact on fuel consumption. A higher compression ratio can enable gas and air to mix more thoroughly in the cylinder, making the combustion process more complete, thereby enhancing thermal efficiency and reducing fuel waste. Conversely, if the compression ratio is too low, the gas will not burn completely, and some of the energy will be discharged along with the exhaust gas without being effectively utilized, resulting in an increase in fuel consumption. In addition, the valve phase of the engine should not be ignored either. Accurate valve timing can ensure sufficient intake and complete exhaust, enabling effective combustion of gas within the cylinder. If there is a deviation in the gas distribution phase, insufficient intake or poor exhaust, it will affect the combustion process and subsequently lead to an increase in fuel consumption.

　　The operating conditions are important external factors affecting the fuel consumption of gas engines. The load of the engine is directly related to the fuel consumption. Under low-load conditions, in order to maintain operation, the combustion efficiency of the engine is relatively low, and the fuel consumption per unit power will be relatively high. When operating at high loads, if it exceeds the working range of the engine, the combustion conditions will also deteriorate, resulting in incomplete fuel combustion and an increase in fuel consumption. The rotational speed of the engine is also closely related to fuel consumption. Generally speaking, there exists an economic speed range. Within this range, the combustion efficiency of the engine is relatively high and the fuel consumption is relatively low. When the rotational speed is too high or too low, it will disrupt the good combustion state, resulting in unreasonable fuel consumption. For example, when the rotational speed is too high, the gas in the cylinder flows too fast, the mixture of gas and air is uneven, and the combustion is incomplete. When the rotational speed is too low, the combustion process is unstable, which will also lead to a decrease in fuel utilization rate.

　　The quality of fuel has a direct impact on the fuel consumption of gas engines. The composition and calorific value of gas vary, and so does the energy released during combustion. If there are many impurities in the gas and its calorific value is unstable, the engine will find it difficult to achieve stable and effective combustion during the combustion process. This will prompt the engine to increase fuel supply to maintain power output, thereby leading to an increase in fuel consumption. In addition, the pressure and temperature of the fuel also affect the combustion effect. Appropriate fuel pressure and temperature can ensure that the gas enters the cylinder in a good state and mixes fully with the air. If the fuel pressure is too high or too low, or the temperature is not suitable, it will affect the atomization and mixing effect of the gas, resulting in incomplete combustion and increased fuel consumption.

　　The maintenance condition of gas engines also affects fuel consumption. Regular maintenance of the engine should be carried out to ensure that key components such as spark plugs and fuel injectors are in good condition, which can guarantee the accuracy of ignition and fuel injection and ensure the complete combustion of gas. If the spark plug fails to ignite properly, the fuel injector is clogged or the fuel injection is uneven, it will cause problems in the combustion process, preventing the fuel from fully releasing energy and thus resulting in fuel waste. At the same time, maintaining good lubrication of all components of the engine and reducing the frictional resistance between components also helps to lower the energy loss during engine operation, thereby reducing fuel consumption.