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Chapter 1: new diesel fuel injector key technology breakthroughs
2.1 Electronic control injection technology innovation
The new diesel fuel injector adopts advanced electronic control technology, through the electronic control unit (ECU) to accurately control the injection process. ECU can be based on the engine speed, load, temperature and other sensor signals, real-time calculations of the optimal time and amount of injection, and through the solenoid valve and other actuators to accurately control the opening and closing of the fuel injector. This electronically controlled injection technology greatly improves the precision and flexibility of injection, and is capable of realizing complex injection strategies such as multiple injection and pre-injection. Pre-injection allows a small amount of fuel to be injected before the main injection, creating an environment in the combustion chamber conducive to the rapid and full combustion of the main injection fuel, thus lowering the combustion temperature and reducing NOx emissions. Multi-injection can make the fuel more evenly distributed in the combustion chamber, improve combustion efficiency and reduce PM emissions.

2.2 Injector Nozzle Material and Structure Optimization
The new injector is optimized in terms of nozzle material and structure. In terms of materials, new alloy materials with high strength, high temperature resistance and corrosion resistance are used to improve the durability and reliability of the injector nozzles. In terms of structural design, new nozzle orifice structures have been developed, such as micro-orifice nozzles and variable cross-section orifice nozzles. Micro-hole injector nozzle by reducing the diameter of the nozzle hole, increase the number of holes, so that the fuel injection is more refined, better atomization effect, thus promoting the mixing of fuel and air, improve combustion efficiency. Variable cross-section orifice injectors can automatically adjust the cross-sectional area of the orifices according to the changes in engine operating conditions to achieve the best injection effect under different operating conditions.

Chapter 2: New Diesel Fuel Injector Application Cases
2.1 Application in the field of heavy-duty trucks
A well-known heavy-duty truck manufacturer has adopted a new type of diesel fuel injector in its new model. The diesel engine of this model is equipped with a new type of electronically controlled injection technology, which is able to adjust the injection strategy in real time according to the vehicle's load, road conditions, and the driver's operating habits and other factors in the process of traveling. In real-world road tests, the new model's fuel economy improved by about 12% under urban combined conditions compared to vehicles of the same type with conventional injectors. Meanwhile, due to the optimized design of the new injector, the fuel is burned more fully, and the emissions of nitrogen oxides and particulates are reduced by 25% and 30% respectively, which meets the more stringent National VI emission standards and effectively improves the environmental performance and market competitiveness of the vehicle.

2.2 Application on ocean-going vessels
When upgrading the power system of an ocean-going vessel, the engine is equipped with a new type of diesel fuel injector. The micro-hole nozzle structure of the new injector makes the fuel better atomized under high-pressure injection and more evenly mixed with air. During the one-year ocean voyage, the ship's fuel consumption was significantly reduced. According to the statistics, compared with the pre-modification, it can save about 150 tons of fuel per year, which greatly reduces the operating cost. Moreover, when responding to different sailing conditions (such as accelerating, cruising, decelerating, etc.), the new injector's fast response characteristics and precise injection control capability ensure that the engine is always in a highly efficient and stable operating state, which guarantees the safety and reliability of the ship's voyage.
The new diesel fuel injector has effectively solved the problems of traditional fuel injector through the key technological breakthroughs such as the innovation of electronically controlled injection technology and optimization of injector nozzle material and structure, which provides strong support for the efficient and clean operation of diesel engine. With the continuous development of technology, the new diesel fuel injector is expected to be widely used in more fields, promoting diesel engine technology to a new height.