Avtodizel ???-238??, Operating Instructions Manual, Page: 42 / 254

42
FUEL FEED SYSTEM
The engine fuel equipment is of divided type. It consists of the
high pressure fuel injection pump with all-modes speed governor, built
- in corrector for a correcting of fuel supply, fuel feed pump, injection
advance coupling (or without it), injectors, filters of rough and thin
cleaning of fuel, fuel pipelines of low and high pressure.
Fig. 19. Scheme of fuel feed system:
А
– sucking up pipeline;
В
– low pressure;
С
– high pressure; D – drainage of
fuel surpluses in tank; 1 – fuel filter of rough cleaning; 2 – high-pressure fuel
injection pump; 3 – fuel filter of thin cleaning; 4 – injector; 5 – injector spray;
6 – fuel feed pump; 7 – fuel tank
From a tank through the filter of rough cleaning the fuel forces
with the fuel feed pump in the filter of thin cleaning and further to the
high pressure fuel injection pump. The fuel pump according to the cyl-
inder firing order supplies fuel through high pressure fuel pipelines to
injectors, which spray it in the engine cylinders. Through the by-pass
valve in the fuel pump and jet in the filter of thin cleaning the surpluses
of fuel, and together with them an air, which has got in system, are
removed through fuel pipeline to a fuel tank. The fuel filtered in a cav-
ity of the injector spring is removed through the drainage pipeline to a
tank.