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

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Fuel supplyThe distributor pipeA distributor pipe is integrated in thesupply line in the cylinder head. It hasthe task of distributing fuel evenly to the pumpinjectors.209_40Cylinder1Cylinder2Cylinder3Cylinder4Cylinder headAnnulargapCross holesDistributor pipe209_39This is how it works:The fuel pump conveys the fuel into the supplyline in the cylinder head.In the supply line, the fuel flows along the innerside of the distributor pipe towards cylinder 1. Thefuel enters the annular gap between thedistributor pipe and the cylinder head wallthrough cross-holes. Here, the fuel mixes with thehot fuel forced back into the supply line by thepump injectors. As a result, the fuel in the supplyline running to all cylinders has a uniformtemperature. All pump injectors are supplied withthe same fuel mass, and the engine runssmoothly.Mixingof the fuelin the annulargapCross boresFuel from pumpinjectorFuel to pumpinjector209_2922
Without a distributor pipe, the fuel temperatureat the pump injector would not be uniform.The hot fuel forced back into the supply line bythe pump injector is pushed from cylinder 4towards cylinder 1 by the flowing fuel into thesupply line.As a result, the fuel temperature rises fromcylinder 4 to cylinder 1 and the pump injectorsare supplied with different fuel masses. Theeffects of this would make the engine runirregularly and would cause an excessively hightemperature in the front cylinders.Cylinder1Cylinder2Cylinder3Cylinder4Cylinder headAnnulargap209_10223
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 and 20: The bypassThe pressure limiting val
Page 21: This is how it works:The fuel pump
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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