The electronically controlled monomer pump adopts a separate oil jet pump, which is respectively installed on the cylinder of the engine . The cylinder and the single pump correspond to each other. The single pump is driven by the engine camshaft. There is a solenoid valve at the upper part of each unit pump, through which to precisely control the timing and the injection time. The last fuel injector uses a mechanical injector, the accuracy requirement is not as high as the common rail, and only 85% of the fine filter requirements described by Dachao Deutz's data can tell the difference. Compared to the complex structure of the common rail system, the electronically controlled monomer pump has relative advantages in terms of reliability and durability, and the cost is also lower. Of course, the single pump also has its own limitations. Due to the structure, multiple injections cannot be realized. Therefore, to achieve a higher national discharge standard, SCR must be added. Fuel injector spring will cause material fatigue and spring elastic force will drop, which will cause injector fuel injection pressure to decrease, which will lead to in-cylinder injection time ahead of schedule, resulting in insufficient combustion, so it needs to be adjusted frequently.
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