Common Rail Diesel Fuel Systems

Common Rail Diesel Fuel Systems

Common Rail Diesel Fuel Systems

●      High pressure accumulator (common rail)

●      Typical fuel rail pressure with engine idling and at running temperature:

●      approximately between 300 – 400 Bar (4410 – 5880 psi)

●      Health and safety

●      Due to the extremely high working fuel pressures in the common

●      rail fuel system, NEVER slacken fuel or injector pipes or try to

●      disconnect components of the fuel system whilst the engine is

●      running and high pressure is present in the system!

●      Typical maximum possible fuel rail pressure:

●  approximately between 1600 – 2000 Bar (23520 – 28400 psi)

Advantages of common rail:

• Fuel pressure available on demand.....

• Higher injection pressures and finer atomization of fuel.....

• Injection pressure created independent of engine speed.....

• Multiple injections per cylinder combustion are possible.

• Reduction of overall exhaust emissions.....

• Reduction of particulate emissions.....

• Reduction of noise emissions.....

• Improved fuel efficiency.....

• Higher performance.

Gasoline Direct Ignition Engine

•      First, the fuel travels via pump from the fuel tank, through the fuel line and into fuel injectors that are mounted into the engine.

•      The injectors spray gasoline into the air intake manifold, where fuel and air mix together into a fine mist. At precisely timed intervals, intake valves open, corresponding to the different cylinders of the engine.