Distribution Type Injection Pump
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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 pump
High-pressure devlopment: Central pump plunger through a cam disc / roller ringVolume 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 pump
High pressure development: Radial plunger driven by a cam-ring / roller tappetVolume 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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Translator: Don Leslie - Email: lesdon@t-online.de
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