Sensitiveness of governor | Definition | Formula

Definition of sensitiveness : 

The ratio of the difference between the maximum and minimum equilibrium speed to the mean equilibrium speed is called sensitiveness of governor.

A governor is said to be sensitive when it readily responds to a small change of speed. The movement of the sleeve for a fractional change of speed is the measure of sensitivity. 

Explanation of sensitiveness :

As a governor is used to limit the change of speed of the engine between minimum to full-load conditions, the sensitiveness of a governor is also defined as the ratio of the difference between the maximum and the minimum speeds to the mean equilibrium speed. 

Sensitiveness = Range of speed / Mean speed 

                       = N2 - N1 / N 
                       = 2 ( N2 - N1 ) / N1 + N2 


N = Mean speed
N1 = Minimum speed corresponding to full load condition 
N2 = Maximum speed corresponding to no-load condition