Denso HP3 Installation guide

DENSO EUROPE B.V., 2003
DENSO EUROPE TECHNICALTRAINING
HP3 Supply Pump

DENSO EUROPE B.V., 2003
Supply pump
Plungers
Feed pump
Delivery valve
SCV (Suction Control
Valve)
Common rail
Common rail pressure
sensor
Pressure discharge
valve
Pressure limiter
Injector
Engine ECU
EDU
Various sensors
Fuel filter
Fuel tank
Flow of injection fuel
Flow of leak fuel
HP3 System Lay-out

DENSO EUROPE B.V., 2003
Feed Pump HP3 (Trochoid type)
Outer rotor
Inner rotor
Suction port
Discharge port

DENSO EUROPE B.V., 2003
Regulating Valve (HP3 Supply pump)
Bushing
Piston
Spring
Plug
Feed pump
SCV
Pump housing

DENSO EUROPE B.V., 2003
Suction Control Valve (HP3 Supply pump)
Feed pump
Regulator valve
SCV
When SCV opening is
small
When SCV opening is
large

DENSO EUROPE B.V., 2003
HP3 Pump body Construction
Eccentric cam
Ring cam
Plunger
Drive shaft

DENSO EUROPE B.V., 2003
Element Check ball Spring Holder Plunger
Construction & Operation of Delivery Valve

DENSO EUROPE B.V., 2003
Supply pump Operation HP3

DENSO EUROPE B.V., 2003
Pressure Discharge Valve Common Rail HP3
: from Common rail
: to Fuel tank
Pressure discharge
valve
Common rail
Operation when fuel pressure
is higher than target injection
pressure
Operation when fuel pressure
is identical to target injection
pressure

DENSO EUROPE B.V., 2003
DENSO EUROPE TECHNICALTRAINING
HP3 Supply Pump
Inspection Procedure

DENSO EUROPE B.V., 2003
Fuel line diagram HP3 on Test bench

DENSO EUROPE B.V., 2003
ECD Controller set up HP3 on Test bench
(Only HP2)

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DST-1 set up HP3

DENSO EUROPE B.V., 2003
DST-1 Test procedure flow HP3

DENSO EUROPE B.V., 2003
DST-1 Test procedure HP3
Always input off set data first( From ETSI Website!)
Same as HP2.

DENSO EUROPE B.V., 2003
DST-1 Test procedure HP3
Always reduce the fuel pressure before stopping the pump!!
If not HP3 can be damaged.

DENSO EUROPE B.V., 2003
• At this moment only repairable p/n 294000-001#
( Toyota Hiace/Hilux
• Always Check ETSI for latest version of Test specifications!
• Always test with safety cover closed.
DST-1 Test procedure flow HP3

DENSO EUROPE B.V., 2003
FIN
ENDE
THE
END
EINDE
THANKS
DANKE
MOLTE GRAZIE
BEDANKT
DOMO
ARIGATO