What are the reasons for high gas consumption in CNG vehicles?
1 Answers
CNG vehicle fuel consumption is related to the selected vehicle model, vehicle condition, and modification technical level. Under the condition of ensuring no gas leakage loss, excessive fuel consumption when using natural gas is related to improper installation and adjustment of the CNG pressure reducer. During the installation of the pressure reducing valve, it is required that the diaphragm plane is perpendicular to the ground; otherwise, the gravity of the diaphragm itself will cause the opening of the three-stage pressure reducing valve to become larger or smaller, affecting fuel consumption. The following are explanations for the related reasons: 1. Driving before the engine reaches operating temperature: The normal operating temperature required by the engine is 800°C to 900°C. In winter, many drivers start driving before the engine reaches the operating temperature, causing insufficient combustion of natural gas, which easily forms carbon deposits and also leads to higher fuel consumption. 2. Idling to warm up the engine: When the engine temperature is below the normal operating temperature, the engine will increase the fuel injection amount and adjust the ignition timing to maintain temperature. 3. Excessive carbon deposits and dirt in the intake tract: Changes in the cross-sectional area of the air passage cause the control unit to be unable to precisely control the idle air intake, resulting in an overly rich or lean mixture, leading to abnormal combustion or engine shaking after starting. 4. Sensors in various parts of the engine: If there are issues, it can also cause the engine ECU to be unable to accurately control the fuel injection amount.
