HP2 Repair

8/11/2019 HP2 Repair

1/13

DENSO EUROPE B.V., 2003

DENSO EUROPE TECHNICAL TRAINING

HP2 Supp ly Pump


2/13


HP2 System Lay-out

Supply pump

Delivery valve

Regulating valve

Common rail pressure

sensor

Flow of injection fuelFlow of leak fuel

Plunger

Feed pump

SCV

Inner cam

Check valve

Common rail

Pressure limiter

Injector

TWV (Two-Way Valve)

Engine ECU

EDU

Various sensors

Fuel filter

Fuel tank


3/13


Feed Pump (HP2 Supply pump)

Rotor

Eccentric ring

Spring

Vane

Front cover

Rear cover


4/13


Regulating Valve (HP2 Supply pump)

Regulating

valve

Feed pump

(discharge side)

Suction inlet

Filter Feed pump

(suction side)

Regulating

valve body

Spring Piston Bushing


5/13


6/13


Fuel Flow (HP2 Supply pump)

to Fuel

tank

to Common rail

Feed

pump

Regulating

valve

SCV 1

SCV 2 Check valve Plunger

Roller Inner cam Delivery

valve


7/13 DENSO EUROPE B.V., 2003

DENSO EUROPE TECHNICAL TRAINING

HP2 Supp ly PumpInspec t ion Procedure



Fuel line diagram HP2 on Test bench



HP2 Supply pump Inspection Procedure Flow



Off-set input Procedure in DST-1

No off-set input

After input off-set data

Off set data are available on test specification sheet. (ETSI website)

Procedure is described in the adjustment manual



Start up settings for ECD Controller

Pump select switch

set to 11



Usage of the Pressure Regulator Valves

Valve 1 : 0 - 60 Mpa

Valve 2 : 60120 Mpa

Valve 3 : 120180 Mpa

Meaning pressure= 0 Mpa


13/13 DENSO EUROPE B V 2003

Adjustment manual for HP2 supply Pump

Manual is based on tests with Denso CPS21 testbench. (Operating differences can occur)

Pictures of test steps are made without safety cover

for better view. Actual tests shouldbe done with use of Hartridge

safety cover. (on AVM2PC)

Be aware of the high temperatures of test oil during

the tests that can cause injuries! Always Check ETSI for latest version of Test

specifications!

Documents

HP2 Repair