Centrifugal regulator
To provide various engine operating modes and ensure the preparation of an accurate dose of fuel, the fuel pump has a centrifugal regulator, also called an all-mode regulator. The weights mounted on it, depending on the speed of rotation, move outward and actuate the lever mechanism on the control gate, which releases excess fuel by opening a hole in the control piston.
If the engine speed in relation to the position of the accelerator pedal is too high, the regulator opens the hole and the speed drops again. When starting, the hole is completely closed and the engine receives the entire dose of fuel, but only until it reaches idle, after which the adjustment resumes. The same happens at full and partial load modes.
The maximum rotation speed is also limited, as the hole opens and the motor cannot rotate at a higher speed.
Injection regulator
When the rotation speed increases, the fuel injection should 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 with increasing pressure, so the cams of the disk run into the rollers earlier and the injection is performed earlier.
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