DENSO EUROPE B.V., 2003

DENSO EUROPE TECHNICAL TRAINING

HP3 Supply Pump

DENSO EUROPE B.V., 2003

Supply pump

Plungers

Feed pump

Delivery valve

SCV (Suction Control Valve)Common rail

Common rail pressure sensorPressure discharge valvePressure 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 TECHNICAL TRAINING

HP3 Supply PumpInspection 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)

DENSO EUROPE B.V., 2003

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