technician a says that a common rail engine can vary the injection pressure, timing, and injection rate shape for each injector. technician b says that the injection pressure is the same for all injectors in common rail engines, and injectors can perform multiple injection events during each combustion cycle. who is correct?

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01-12-2022
Engineering

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technician a says that a common rail engine can vary the injection pressure, timing, and injection rate shape for each injector. technician b says that the injection pressure is the same for all injectors in common rail engines, and injectors can perform multiple injection events during each combustion cycle. who is correct?

Sagot :

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kumarravichandra kumarravichandra · Answer 1 · 2022-12-06T00:47:24-05:00

Technician a is correct because According to him, a common rail engine has the ability to change the injection pressure, timing, and rate shape for each injector.

An alternative to low-pressure fuel pumps feeding unit injectors is a direct fuel injection system called common rail engine direct fuel injection, which is designed on high-pressure fuel rail feeding solenoid valves. The rail functions as a fuel accumulator to keep the pressure in the engine's fuel system roughly constant at all fuelling rates. Through high pressure pipes, fuel is delivered from the rail to the injectors. Each solenoid valve within an injector is sequentially activated by current pulses produced by the ECU. Commercial common rail systems employ radial, unit, and in-line pumps. High pressure pump designs are changing to improve the fuel injection system's efficiency and enable precise rail pressure management. The pressure in the common rail can be controlled in a number of ways.

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