Governor

The governor automatically adjusts the fuel supply in response to load fluctuations in order to maintain an appropriate engine speed during acceleration and deceleration.
By doing so, it enables a constant engine speed to be maintained, even when slight load fluctuations occur. Because a constant engine speed enables the centrifugal force of the flyweight and tension of the governor spring to be balanced, the fuel injection quantity can also be kept constant.
For details, see "Mechanical governor" and "Electronic governor."

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