1. Introduction
The fuel injector needle valve component is an important component in the diesel injection system, which controls the quantity of diesel oil discharged into the cylinder, and plays an important role in the performance and quality of the diesel engine. In this paper, the effect of fuel injection quantity on the smooth operation of multi-cylinder diesel engines and countermeasures will be discussed.
2. Effect of fuel injection quantity on diesel engine
The fuel injection quantity of the injector needle valve component determines the amount of fuel entering the cylinder combustion chamber and thus directly affects the performance of the diesel engine. Too much fuel injection can lead to an increase in the working pressure and temperature of the diesel engine, the rise of internal exhaust gas temperature and an increase of the smoke emitted. On the other hand, if the fuel injection quantity is too small, the combustion performance of the engine will be reduced, the output power of the engine will be decreased, the exhaust gas temperature will be too low, the lubricating oil consumption of the engine will be increased and the engine will be easily stalled when the engine load is large.
3. Countermeasures
In order to ensure the normal operation of the diesel engine while achieving high fuel economy, it is necessary to carefully adjust the fuel injection quantity of the injector needle valve component according to the actual situation of the diesel engine. The following measures can be taken to adjust the fuel injection quantity.
3.1 Optimize the injection timing
The correct injection timing is beneficial to making full use of the fuel and improving the combustion efficiency of the engine. For diesel engines, the optimal injection timing is determined by the injection nozzle opening pressure and the actual speed of the engine. If the engine speed is too low, the injection timing should be advanced, and if the engine speed is too high, the injection timing should be delayed.
3.2 Choose the appropriate fuel injection pressure
The fuel injection pressure directly affects the fuel injection quantity. When the injection pressure is too high, the fuel injection quantity will be too large, which will reduce the power and efficiency of the diesel engine. On the contrary, if the injection pressure is too low, the fuel injection quantity will be too small, which will affect the power and emissions of the diesel engine. Therefore, the fuel injection pressure should be adjusted reasonably according to the speed and load of the diesel engine.
3.3 Properly adjust the fuel injection nozzle
The size of the fuel injection nozzle determines the atomization effect and the amount of fuel discharged. When the pressure on the nozzle is increased, the size of the nozzle decreases accordingly, and the fuel injection quantity decreases. Therefore, it is necessary to properly adjust the size of the nozzle according to the operating conditions of the diesel engine to ensure the best atomization effect and appropriate discharge quantity.
4. Conclusion
The fuel injection quantity of the injector needle valve component has a direct impact on the performance and quality of the diesel engine. In order to ensure the smooth operation of the diesel engine and achieve high fuel economy, it is necessary to optimize the injection timing, select the appropriate fuel injection pressure and properly adjust the fuel injection nozzle.
