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Distribution Type Injection Pump
Assignment
The distributor type injection pump is still used today - however, with an electronically programmed
injection control - as a reasonable alternative for use in smaller to mid-size Diesel engines with a maximum of six cylinders. In a construction, kept as
compact as possible, it distributes the fuel , by means of a cylinder and a plunger, under high pressure, at the right time, to the individual cylinders.
Function
Fuel supply: rotary vane pump,
filter on the inlet vacuum side
Axial piston pumpHigh-pressure development: Central pump plunger through a cam disc/roller ring Volume regulation: Spill port / sealing ring Injection begin regulation: Internal pressure of the
pump / injection adjuster Electronic regulation: Servo-motor for regulator, a stroke valve controls the pressure in the injection adjuster
Radial piston pumpHigh pressure development: Radial plunger driven by a cam-ring/roller tappet Volume regulation: Changing of the supply volume Injection begin regulation: Turning of the
cam-ring
End of the development
The injection distributor pump has probably reached the end of it's development. It may be able to reach even higher pressures, but cannot generate an injection spray which is broken down into several parts. Thus,
due to the failing post-injection, it probably won't fulfil the exhaust gas regulations for the regeneration of the particle filter. 11/10
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