Diesel distributor fuel-injection pumps VE - K-Jet.org

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Axial-pistondistributorpumpsMechanically-controlled(governed) axial-piston distributorfuel-Injection pumps VEFuel-injectionsystemsAssignmentsThe fuel-injection system is responsiblefor supplying the diesel engine with fuel.To do so, the injection pump generatesthe pressure required for fuel injection.The fuel under pressure is forced throughthe high-pressure fuel-injection tubing tothe injection nozzle which then injects itinto the combustion chamber.The fuel-injection system (Fig. 1) includesthe following components andassemblies: The fuel tank, the fuel filter,the fuel-supply pump, the injectionnozzles, the high-pressure injectiontubing, the governor, and the timingdevice (if required).The combustion processes in the dieselengine depend to a large degree uponthe quantity of fuel which is injected andupon the method of introducing this fuelto the combustion chamber.The most important criteria in this respectare the fuel-injection timing and theduration of injection, the fuel’s distributionin the combustion chamber, the momentin time when combustion starts, theamount of fuel metered to the engine perdegree crankshaft, and the total injectedfuel quantity in accordance with theengine loading. The optimum interplay ofall these parameters is decisive for thefaultless functioning of the diesel engineand of the fuel-injection system.Fig. 1Fuel-injection system with mechanically-controlled (governed) distributor injection pump1 Fuel tank, 2 Fuel filter, 3 Distributor fuel-injection pump, 4 Nozzle holder with nozzle, 5 Fuel return line,6 Sheathed-element glow plug (GSK) 7 Battery, 8 Glow-plug and starter switch, 9 Glow control unit (GZS).154263,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,9788UMK1199Y
TypesThe increasing demands placed uponthe diesel fuel-injection system made itnecessary to continually develop andimprove the fuel-injection pump.Following systems comply with thepresent state-of-the-art:– In-line fuel-injection pump (PE) withmechanical (flyweight) governor orElectronic Diesel Control (EDC) and, ifrequired, attached timing device,– Control-sleeve in-line fuel-injectionpump (PE), with Electronic DieselControl (EDC) and infinitely variablestart of delivery (without attachedtiming device),– Single-plunger fuel-injection pump (PF),– Distributor fuel-injection pump (VE)with mechanical (flyweight) governoror Electronic Diesel Control (EDC).With integral timing device,– Radial-piston distributor injectionpump (VR),– Common Rail accumulator injectionsystem (CRS),– Unit-injector system (UIS),– Unit-pump system (UPS).Fuel-injectiontechniquesFields of applicationSmall high-speed diesel enginesdemand a lightweight and compact fuelinjectioninstallation. The VE distributorfuel-injection pump (Fig. 2) fulfills thesestipulations by combining– Fuel-supply pump,– High-pressure pump,– Governor, and– Timing device,in a small, compact unit. The dieselengine’s rated speed, its power output,and its configuration determine theparameters for the particular distributorpump.Distributor pumps are used in passengercars, commercial vehicles, agriculturaltractors and stationary engines.Fig. 2: VE distributor pump fitted to a 4-cylinderdiesel engineFuel-injectiontechniquesUMK0318Y9
Page 3 and 4: Dieseldistributor fuel-injection pu
Page 5: (prechamber engines and direct-inje
Page 8 and 9: Diesel fuelinjectionsystems:An over
Page 12: Axial-pistondistributorpumpsSubasse
Page 17 and 18: contaminants in the fuel can lead t
Page 19 and 20: Pump assembly with distributor head
Page 21 and 22: Fig. 10Distributor plunger with str
Page 23 and 24: Delivery valve with return-flowrest
Page 25 and 26: - Maximum-speed governing: With the
Page 27 and 28: start-quantity position by the ball
Page 29 and 30: Overrun (engine braking)During down
Page 31 and 32: Injection timingIn order to compens
Page 33 and 34: through a sliding block and a pin s
Page 35 and 36: Fig. 2Schematic of the VE distribut
Page 37 and 38: the torque-control lever tilts arou
Page 39 and 40: Power and torque comparison, natura
Page 41 and 42: Load-dependentcompensationDepending
Page 43 and 44: Cold-start compensationThe diesel e
Page 45 and 46: Design and constructionThe hydrauli
Page 47 and 48: Testing and calibrationInjection-pu
Page 49 and 50: Throttling pintle nozzleThe throttl
Page 51 and 52: Sac-hole nozzle with cylindrical sa
Page 53 and 54: The nozzle-holder body contains the
Page 55 and 56: This necessitates a nozzle holder w
Page 57 and 58: formation in accordance with specif
Page 59 and 60: Closed control loops (Fig. 5)Inject
Page 61 and 62:
Table 1. ECU reactionsFailure Monit
Page 63 and 64:
High-pressure solenoid valveThe hig
Page 65 and 66:
Sheathed-element glow plugs:Tempera
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Diesel distributor fuel-injection pumps VE - K-Jet.org

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