1.9-ltr. TDI Engine with Pump Injection System - Volkswagen ...

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Fuel supplyThe fuel pumpThe fuel pump is located directlybehind the vacuum pump at thecylinder head. It has the task ofconveying the fuel from the fuel tankto the pump injector.Both pumps are driven jointly by thecamshaft, which is why they arecollectively known as a tandempump.Fuel return lineVacuumpumpFuel pumpFuel supply lineConnectionfor pressuregauge209_49There is a connection for pressure gauge V.A.S. 5187 on the fuel pump for checking the fuelpressure in the supply line. Please observe the instructions in the Workshop Manual.The fuel pump is a blocking vane-cellpump. With this type of pump, theblocking vanes are pressed againstthe rotor by the spring pressure. Theadvantage of this is that the pumpdelivers fuel even at low enginespeeds. Rotary vane pumps do notprime until the engine is running sofast that the vane cells are pressedagainst the stator by centrifugal force.The fuel ducting system <strong>with</strong>in thepump is designed so that the rotoralways remains wetted <strong>with</strong> fuel evenif the tank has been run dry. Thismakes automatic priming possible.Pressure regulatingvalve for fuel supplylineConnection forfuel supply lineFrom the returnline in thecylinder headRotorBlocking vanesRestrictorStrainerIn the supply linein the cylinderheadConnection for fuelreturn linePressure regulatingvalve for fuel returnline209_5020
This is how it works:The fuel pump operates by intaking when thevolume increases and delivering when thevolume reduces.The fuel is drawn and pumped into twochambers. The intake chambers and feedchamber are separated from one another by theblocking vanes.In this figure, fuel is drawn out of chamber 1 andpumped out of chamber 4. The rotationalmovement of the rotor increases the volume ofchamber 1 while the volume of chamber 4reduces.Chamber 4Chamber 1Rotor209_52In this figure, the other two chambers are inaction. The fuel is pumped out of chamber 2 anddrawn out of chamber 3.Chamber 3Chamber 2209_5121
Page 3 and 4: Table of contentsIntroduction .....
Page 5 and 6: SpecificationsEngine code:Type:Stro
Page 7 and 8: Fitting locationThe pump injector i
Page 9 and 10: Drive mechanismThe camshaft has fou
Page 11 and 12: The injection cycleThe high-pressur
Page 13 and 14: The pre-injection cycle commencesIn
Page 15 and 16: The injection cycleThe main injecti
Page 17 and 18: Fuel return in the pump injectorThe
Page 19: The bypassThe pressure limiting val
Page 23 and 24: Without a distributor pipe, the fue
Page 25 and 26: The fuel cooling circuitThe fuel re
Page 27 and 28: Glow plugs Q6Control unitfor diesel
Page 29 and 30: Cylinder recognition when starting
Page 31 and 32: FunctionQuick start recognitionTo a
Page 33 and 34: The following sensors have previous
Page 35 and 36: Intake manifold pressure sender G71
Page 37 and 38: Brake light switch F andbrake pedal
Page 39 and 40: ActuatorsInjector solenoid valvesN2
Page 41 and 42: When the valve is closed, the curre
Page 43 and 44: Fuel cooling relay J445The fuel coo
Page 45 and 46: Warning lamp for glow period K29The
Page 47 and 48: Glow plug systemGlow plug systemThe
Page 49 and 50: 3015J52SSSSE45A/+B D F GFF47F36CESG
Page 51 and 52: Engine mechanicalsTo make allowance
Page 53 and 54: This is how it works:During the inj
Page 55 and 56: Special toolsDesignation Tool UseT
Page 57 and 58: Test your knowledge1.Identify the c
Page 59 and 60: NotesSolutions:1. For a list of com

1.9-ltr. TDI Engine with Pump Injection System - Volkswagen ...

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