COMMON RAIL INJECTION SYSTEM FUNCTION [MZR‐CD (RF Turbo)]

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• This system stores fuel under high pressure supplied by the supply pump in the common rail, and injects it through the electromagnetic injectors.
• The PCM controls both fuel injection amount and timing by sending a signal to the injector electromagnetic valve.
• Since fuel is highly pressurized by the supply pump and stored in the common rail, injection pressure is constantly assured even at low speed since engine speed and load have no influence on the injection process.
• The PCM can precisely control the fuel injection amount and timing due to use of an electromagnetic valve in the injector that opens and closes the fuel path.
• Fuel is injected multiple times, including multiple auxiliary injections previous to the main injection. These multiple injections help to smooth the fuel combustion process, reducing noise and vibration levels as well as the amount of NOx in the exhaust.
• With the use of 180 MPa {1,835 kgf/cm2, 26,107 psi} ultra-high pressure injectors, engine output is improved and the amount of smoke and particulate matter in the exhaust is greatly reduced.

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1 | Fuel tank
2 | Fuel filter
3 | Supply pump
4 | Common rail
5 | Fuel pressure limiter
6 | Fuel pressure sensor
7 | Fuel injector
8 | Return fuel flow
9 | Main fuel flow