Governors

Flywheel which minimizes fluctuations of speed with

in the cycle but it cannot minimize fluctuations due to load variation. This means flyw

heel does not exercise any control over mean speed of the engine. To minimize fluctuat

ions in the mean speed which may occur due to load variation, governor is used. The

governor has no influence over cyclic speed fluctuations but it controls the mean speed o

ver a long period during which load on the engine may vary. 

 

The function of governor is to increase the supply of working fluid going to the prime- mover when the load on the prime-mover increases and to decrease the supply when the load decreases so as to keep the speed of the prime-mover almost constant at different loads.

 

Example: when the load on an engine increases, its speed decreases, therefore it becomes necessary to increase the supply of working fluid. On the other hand, when the load on the engine decreases, its speed increases and hence less working fluid is required.

When there is change in load, variation in speed also takes place then governor operates a regulatory control and adjusts the fuel supply to maintain the mean speed nearly constant. Therefore, the governor automatically regulates through linkages, the energy supply to the engine as demanded by variation of load so that the engine speed is maintained nearly constant. 

 

 

 

 

 

 

 

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