Contents: Centrifugal governor ↳ Injection regulator ↳
Centrifugal governor
To ensure various engine operating modes and to ensure the preparation of an accurate dose of fuel, the fuel pump has a centrifugal regulator, also called an all-mode regulator. The weights installed on it, depending on the rotation speed, move outward and activate the lever mechanism on the adjustment valve, which releases excess fuel by opening a hole in the distribution piston.
If the engine speed is too high in relation to the accelerator pedal position, the regulator opens the hole and the speed drops again. At startup, the hole is completely closed and the engine receives the full dose of fuel, but only until it reaches idle mode, after which the regulation is resumed. The same thing happens in full and partial load modes.
The maximum rotation speed is also limited because the hole opens and the motor cannot rotate at a higher speed.
Injection regulator
As the rotation speed increases, fuel injection must occur earlier, which is done by the injection regulator. As the engine speed increases, the rotary pump rotates faster and the fuel pressure increases, which acts on the piston and moves it against the force of the spring.
The roller ring, rigidly connected to the piston, rotates around the axis as the pressure increases, so the disc cams run onto the rollers earlier and the injection occurs earlier.
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