2.5.3. Description of a fuel supply system
The fuel supply system consists of the fuel tank, the fuel pump (with the built-in fuel filter), the regulator of pressure of fuel, a fuel stage and fuel nozzles.
Fuel from the fuel tank is sucked in by the fuel pump, passes through the fuel filter and moves under pressure to fuel nozzles through a fuel stage. As fuel pressure in a fuel nozzle (fuel pressure in the giving fuel-supply line) is always supported by pressure regulator at the certain level and exceeds pressure in an inlet collector, fuel is injected into the inlet channel of a head of the block of cylinders when the fuel nozzle opens on a signal from an electronic control unit.
The fuel bypassed by pressure regulator comes back through the return fuel-supply line to the fuel tank.