SSANGYONG 2004 Rexton 2.7XDi Workshop Manual page 274

DI07-16
Principle of Operation
The LP actuator is used to proportion the amount of fuel sent to the pumping element of the HP pump in such a way that
the pressure measured by the HP sensor is equal to the pressure demand sent out by the ECU. At each point of
operation, it is necessary to have:
• Flow introduced into the HP pump = Injected flow + Injector backleak flow + injector control flow
The IMV is normally open when it is not being supplied with fuel. It cannot therefore be used as a safety device to shut
down the engine if required.
The IMV is controlled by current. The flow/current law is represented below.
Specifications
Piston stroke
Diameter of holes
Coil resistance
Power supply
Max. current
Weight
Operating temperature
Fluid temperature
Control logic
• ECU determines the value of the current to be sent to the IMV according to:
• Engine speed
• Flow demand
• Rail pressure demand
• Measured rail pressure
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
Flow / Current Law
Current (mA)
1.4 mm
3.4 mm
5.4 Ω (at 25°C)
Battery voltage (It is prohibited to supply the IMV directly at the battery voltage
during the diagnostic test)
1 A
260 g
40°C < T < 125°C
40°C < T < 90°C
Normally open without power (The flow decreases as the current rises).
E
C
U
• Inlet Metering
Valve (IMV)
Y220_07020
FUEL SYSTEM
DI ENG SM - 2004.4