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After years of development, diesel injection technology has evolved from the original mechanical injection system to a highly sophisticated electronically controlled injection system. The following are the main milestones in the development of diesel injection technology:

1.Early mechanical injection system: The earliest diesel injection system was mechanical, using an injection pump and a fuel injection nozzle to inject diesel into the cylinder. This system is usually driven by a mechanical connecting rod, and its injection amount and injection timing are regulated by mechanical components.

2.The emergence of electronically controlled injection systems: In the 1980s, the development of electronic control technology promoted the emergence of electronically controlled injection systems. This system uses an electronic control unit (ECU) to accurately control the injection amount and injection timing, thereby achieving higher fuel efficiency and emission performance.

3.High-pressure common rail injection technology: In the late 1990s and early 2000s, high-pressure common rail injection technology began to be widely used. This technology uses a common rail fuel supply system to store diesel at very high pressure in the common rail and accurately inject it into the cylinder through electronically controlled injectors. The high-pressure common rail system provides higher injection pressure and more precise injection control, thereby improving fuel efficiency and power performance.

4.Continuous improvement of injection pressure: With the advancement of technology, the working pressure of the injection system has been continuously improved, from the initial hundreds of bar to the current thousands of bar. Higher injection pressure can achieve better fuel atomization and higher combustion efficiency, thereby improving power output and reducing emissions.

5.Application of multiple injection technology: In recent years, diesel injection systems have begun to adopt multiple injection technology. This technology achieves more precise combustion control by performing multiple injections in each combustion cycle, thereby further improving fuel efficiency and reducing emissions.

In general, the development of diesel injection technology is mainly focused on improving injection accuracy, increasing injection pressure, optimizing injection timing and exploring new injection strategies, aiming to achieve higher fuel efficiency, lower emissions and superior power performance.