The diesel engine distribution pump fuel injection system is similar to the inline type in that it adopts a plunger type fuel injection pump and a mechanical centrifugal speed controller. The fuel injector is connected to the fuel injection pump through an oil pipe, and the fuel injector is a passive fuel injection system; The difference is that the distribution pump reduces the number of plunger pumps (only one plunger coupling), and high-pressure diesel is sent to the injectors of each cylinder in the working order of the distribution rotor. The high-pressure oil pipe must be connected according to the rotation direction of the distribution rotor and the working order of each cylinder during installation.
The reduction in the number of distribution pump plungers reduces the volume of the fuel injection pump itself, makes the structure more compact, reduces costs, and the increase in driving speed increases the fuel injection pressure.
The driving speed of the distribution pump can reach three times the crankshaft speed. On the premise that the sealing degree of the plunger coupling remains unchanged, the higher the driving speed of the fuel injection pump, the higher the fuel injection pressure, and the fuel injection pressure of the distribution pump can reach 60-80 MPa. High pressure injection is beneficial for diesel fuel to atomize combustion more fully and reduce smoke levels.
Cummins 6BT diesel generator, Iveco 8140 diesel generator, Isuzu 4JBI diesel generator, etc. all use a distribution pump fuel injection system, and an electronically controlled distribution pump fuel injection system has been developed.
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