Governor is a mechanical device
which is used to regulate the mean speed of the engine, when there are
variations in the load. When load on the engine varies, the configuration of
the governor changes and it controls the supply of the fuel to the engine. How
does it controls the supply, this question arises in our mind, so let’s find
out what happens in the governor’s configuration when load varies on the
engine.
When load on the engine
increases, its speed decreases, so it becomes necessary to increase the supply
of the working fluid (ex petrol or diesel) to the engine. On the other hand
when the load on the engine decreases, the governor’s speed increases, so it
requires to decrease the supply of the fuel.
When the speed of the governors
increases, its sleeve moves in upward direction, which is connected to a
throttle valve through a bell crank lever. This upward motion of the sleeve
operates the valve to decrease the supply of the fuel. And when the speed of
the governor decreases due to the increase in the load, the sleeve move
downward, this made the valve to open to a larger extent and increases the fuel
supply