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#types of fuel injection system in diesel engine
Throttle Body Injection
Common Rail Injection
CN / Rodge_ChinaLutong
The newest Common Rail Injection is also called CRI system.
Common Rail System: types of fuel injection system in diesel engine
The primary pump (1) supplies fuel to a high-pressure reservoir, the fuel rail, where the fuel is stored at the optimal pressure for the engine's instantaneous operating conditions in preparation for subsequent injection.
Each of the engine's cylinders is equipped with an injector featuring an integral solenoid valve. This solenoid valve opens and closes to define the starting point and mass of the injection process.
The driver's demand is defined by the accelerator pedal. The ECU registers driver demand and current vehicle operating conditions as the basis for calculating the required fuel pressure, injection duration (= fuel mass) and injection timing according to the parameters defined in the program map
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Common Rail System: #fuel injection system in diesel engine pdf
In addition, Common Rail technology differs from conventional systems by providing multiple injections per working cycle. This cycle is divided into pre-injection (pilot injection) for quiet engine running, main injection for ideal power deployment and secondary injection for reduced emissions. The fuel reaches the injector via short pressure lines and then through the injection nozzles into the combustion chamber.
The higher the injection pressure in #bosch injector nozzle part numbers, the finer the injection system vaporizes the fuel, thus permitting even more efficient combustion. In 2005, Bosch already introduced the third Common Rail generation with injection pressures of 1,800 bar for light commercial vehicles onto the market. A version of this system for medium-sized and heavy commercial vehicles will follow in 2007. The first Bosch generation for commercial vehicles went into series production in 1999 with an injection pressure of 1,400 bar. The second generation with a pressure of 1,600 bar followed in 2001.
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Against the background of ever-stricter exhaust-gas pollutant values worldwide, Bosch has continued to further develop its injection systems. Based on the 1,800 bar injector, the company will continue to develop its systems for pressures of 2,000 bar and 2,200 bar.
types of fuel injection system in diesel engine