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

Axial-pistondistributorpumpsSubassembliesIn contrast to the in-line injection pump,the VE distributor pump has only onepump cylinder and one plunger, even formulti-cylinder engines. The fuel deliveredby the pump plunger is apportionedby a distributor groove to the outlet portsas determined by the engine’s number ofcylinders. The distributor pump’s closedhousing contains the following functionalgroups:– High-pressure pump with distributor,– Mechanical (flyweight) governor,– Hydraulic timing device,– Vane-type fuel-supply pump,– Shutoff device, and– Engine-specific add-on modules.Fig. 3 shows the functional groups andtheir assignments. The add-on modulesFig. 3facilitate adaptation to the specificrequirements of the diesel engine inquestion.Design and constructionThe distributor pump’s drive shaft runsin bearings in the pump housing anddrives the vane-type fuel-supply pump.The roller ring is located inside thepump at the end of the drive shaft althoughit is not connected to it. A rotating-reciprocatingmovement is impartedto the distributor plunger by way of thecam plate which is driven by the inputshaft and rides on the rollers of theroller ring. The plunger moves insidethe distributor head which is bolted to thepump housing. Installed in the distributorhead are the electrical fuelshutoff device, the screw plug with ventscrew, and the delivery valves with theirThe subassemblies and their functions1 Vane-type fuel-supply pump with pressure regulating valve: Draws in fuel and generates pressureinside the pump.2 High-pressure pump with distributor: Generates injection pressure, delivers and distributes fuel.3 Mechanical (flyweight) governor: Controls the pump speed and varies the delivery quantity withinthe control range.4 Electromagnetic fuel shutoff valve: Interrupts the fuel supply.5 Timing device: Adjusts the start of delivery (port closing) as a function of the pump speed andin part as a function of the load.341105 2UMK0317Y