What are the reasons why an LNG vehicle fails to start?
3 Answers
Reasons why an LNG vehicle fails to start: 1. The liquid temperature is relatively low after refueling; 2. The pressure regulating valve is set too low; 3. The economizer valve pressure is adjusted too low; 4. The safety valve is damaged, causing gas leakage; 5. There is gas leakage in other pipelines. The following is an introduction to LNG vehicles: LNG vehicles are short for liquefied natural gas vehicles. LNG vehicles are a new generation of natural gas vehicles that use low-temperature liquefied natural gas as fuel. Their prominent advantage is the high energy density of LNG, which allows for a driving range of over 400km, offering significant economic benefits compared to vehicles using diesel or gasoline.
I've been driving LNG trucks for long hauls for several years, and there are several common reasons for failure to start. First, fuel system issues—if there's insufficient gas in the LNG tank or the valve isn't opened properly, it's like running out of fuel, and the vehicle won't start. Or, ice may block the pipelines, especially in winter when LNG tends to clump. Second, battery issues—if the battery is old or the contacts are loose, there won't be enough current during startup. Third, ignition problems—too much carbon buildup on the spark plugs can prevent ignition. Another possibility is an ECU control module malfunction, disrupting fuel supply. I've encountered this situation before—first, check the tank pressure and ignition components. Regular maintenance is key, including periodically cleaning the filters and testing battery voltage. If the problem persists, seek professional repair immediately to avoid breakdowns on the road.
As someone who frequently repairs these types of vehicles, I've found that the root causes of LNG vehicles failing to start often lie in system details. Insufficient battery charge is one of the main reasons, especially during cold starts. Inadequate pressure in the LNG tank or automatic locking of the safety valve can prevent fuel release. Aging ignition coils or spark plugs leading to ignition failure is similar to gasoline vehicles. ECU malfunctions are also possible, as it controls fuel injection. Environmental factors like low temperatures can affect combustion efficiency by preventing LNG from vaporizing properly. Additionally, poor fuel purity or impurities can clog fuel injectors. When troubleshooting, first confirm whether the tank valve is open and test the battery. If problems persist, check for corrosion in wiring connections. Maintaining these components well will make the vehicle less prone to breakdowns.
