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To burn fuel properly inside the cylinder fine sprays are required, so high pressure is required to inject the fuel through fine holes of injectors. Injector pressure is the pressure by which fuel is injected in a D.I. Engine. Injector pressure is different for different engines, depends on the design of engine, combustion chamber etc.

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The purpose of the fuel injection system is to deliver fuel into the engine cylinders, while precisely controlling the injection timing, fuel atomization, and other parameters. The main types of injection systems include pump-line-nozzle, unit injector, and common rail. Modern injection systems reach very high injection pressures, and utilize sophisticated electronic control methods. in other word injector pressure is a vital system for a engine to work. 

 

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