The article discusses how improving the fuel supply system of a diesel engine can enhance its performance and reduce environmental impact. By adjusting the fuel injection timing, the researchers found that fuel consumption can be decreased by up to 15%. However, increasing the fuel injection timing also leads to higher NOx emissions. The study was conducted on a diesel engine operating with the Miller cycle, and tests were carried out at a plant in Russia. The main goal was to make the diesel engine more efficient and environmentally friendly.