Outline Of Fuel Injection Pump - Takeuchi TB 175 Handbuch

2.3. Outline of fuel injection pump

Yanmar distribution type fuel injection pump YPD-MP consists of a hydraulic head that is equipped with a single plunger, a
single distribution shaft, and delivery valves for each individual cylinders, a pump housing that includes camshafts, and a
governor, all of which are integrated into the main unit of the pump.
For the feed of the fuel, the plunger moves up / down and the distribution shaft rotates with the revolution of the camshaft
to distribute the fuel among the cylinders individually.
Specifically, one revolution of camshaft completes three cycles (for three cylinder engine) of a process, including switching
over to the high pressure flow path to each cylinder with the distribution shaft, opening delivery valve, high pressure pipe,
fuel injection valve, and engine cylinders in this order. This process is repeated by the revolution of the camshaft.
< The Flow of the Fuel >
Electric fuel
feed pump
Water separator
Fuel tank
orifice
Fuel injection pipe
Fuel filter
Nozzle
Torochoid pump
Pressure control valve
Injection pump
Timer piston
Plunger
Distributor
shaft
joint
Fuel return
Cam
oil
Engine
Oil seal
Low pressure gallery
6
Thermo-element
Engine coolant
Accumulator
Overflow
orifice
tappet
High pressure gallery
Engine crankcase