New High Quality Diesel Injector 235-1401 239-4909 244-7716 249-0709 10R-1273 10R-9236 For CAT C15

Optimize injection pressure
Increase injection pressure: Higher injection pressure can make the fuel atomized better, making the oil droplets smaller and more evenly distributed, so that the fuel and air can be fully mixed, which can effectively reduce the incomplete combustion caused by poor fuel atomization and reduce the emissions of particulate matter (PM), hydrocarbons (HC) and carbon monoxide (CO). For example, increasing the injection pressure from 160MPa to 200MPa can significantly improve the fuel atomization effect and reduce PM emissions by 20% - 30%. However, too high injection pressure will increase the combustion temperature and increase nitrogen oxide (NOx) emissions, so comprehensive consideration is needed.

Use variable injection pressure technology: The engine has different requirements for injection pressure under different working conditions. Variable injection pressure technology can adjust the injection pressure in real time according to the engine load, speed and other working conditions. Under low load conditions, appropriately reduce the injection pressure to avoid excessive combustion temperature and reduce NOx emissions; under high load conditions, increase the injection pressure to ensure sufficient atomization and combustion of the fuel, and reduce PM, HC and CO emissions.

Optimize the design of the spray hole
Reduce the diameter of the spray hole: A smaller spray hole diameter can make the fuel spray faster and more evenly disperse the fuel, which helps to improve the mixing effect of fuel and air and reduce PM emissions. However, the diameter of the spray hole cannot be too small, otherwise it will increase the injection resistance, the injector will be easily blocked, and the reliability and stability of the engine will be affected. Generally speaking, the diameter of the spray hole can be optimized within the range of 0.1-0.3mm according to the specific conditions of the engine.

Increase the number of spray holes: Increasing the number of spray holes can make the fuel more evenly distributed in the combustion chamber, avoid the concentration of fuel in local areas, thereby improving combustion efficiency and reducing pollutant emissions. For example, increasing the number of spray holes from 4 to 6 will make the fuel distribution more even, and HC and CO emissions can be reduced by 10%-15%. At the same time, the layout and angle of the spray holes are reasonably designed to match the fuel spray with the shape of the combustion chamber and the airflow movement, further optimizing the fuel distribution.

Optimize the injection time
Precisely control the injection timing: Accurately adjust the start time of the injection according to the engine working conditions. Generally speaking, under partial load conditions, appropriately delaying the injection can reduce the combustion temperature and reduce NOx emissions; under full load conditions, it is necessary to select a suitable injection timing to ensure that the fuel can be fully burned when the piston reaches the top dead center, improve the engine's power performance and fuel economy, and reduce PM, HC and CO emissions. For example, it was determined through experiments that under a certain working condition, adjusting the injection advance angle from 15° to 12° can reduce NOx emissions by 15% - 20%.

Use multiple injection technology: Multiple injection technology means that the injector performs multiple injections in one working cycle. Common ones are pre-injection, main injection and post-injection. Pre-injection can inject a small amount of fuel before the main injection, forming a local high-temperature area in the combustion chamber, promoting the combustion of the main injection fuel, improving the combustion process, and reducing PM and NOx emissions. Post-injection is to inject a small amount of fuel after the main injection, using the combustion of the post-injection fuel to increase the exhaust temperature, promote the oxidation regeneration of particulate matter in the particulate filter, and reduce PM emissions.