Components Of High Pressure Transfer Line; High Pressure Pump (Including Imv And Limit Valve); Common Rail (Including Pressure Sensor); High Pressure Pipe (Fuel Pipe) - SSANGYONG 2004 Rexton 2.7XDi Workshop Manual

DI07-10

Components of High Pressure Transfer Line

In the high pressure section, sufficient fuel pressure that injectors requires will be generated and stored. The compo-
nents are as below:
• High pressure pump
• Rail pressure sensor
• Pressure limit valve
• Common rail
• High pressure pipe
• Injector
• Fuel pressure regulating valve (IMV)
No.1 and 3 cylinder
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
Y220_07013
Y220_07014
No. 5 cylinder
No.2 and 4 cylinder
Y220_07015

High pressure pump (including IMV and limit valve)

This is plunger pump that generates high pressure; and driven
by crankshaft with timing chain. The high pressure pump in-
creases system pressure of fuel to approx. 1,600 bar and this
compressed fuel is transferred to high pressure accumulator
(common rail) in tube through high pressure line.

Common rail (including pressure sensor)

It stores fuel transferred from high pressure pump and also
stores actual high pressure of fuel. Even though the injectors
inject fuel from the rail, the fuel pressure in the rail is main-
tained to a specific value. It is because the effect of accumu-
lator is increased by unique elasticity of fuel. Fuel pressure is
measured by rail pressure sensor. And the inlet metering valve
(IMV) included in high pressure pump housing keeps pres-
sure to a desired level.

High pressure pipe (fuel pipe)

Fuel line transfers high pressure fuel. Accordingly, it is made
of steel to endure intermittent high frequency pressure changes
that occur under maximum system pressure and injection
stops. Injection lines between rail and injectors are all in the
same length; it means the lengths between the rail and each
injector are the same and the differences in length are com-
pensated by each bending.
FUEL SYSTEM
DI ENG SM - 2004.4