Universal M-12 - Section V - Electrical System; Wiring Diagram

GOVERNOR
With centrifugal ball weight system this mechanical governor works in the whole range of speeds.
It keeps the engine speed and controls the engine output.
At
Start
When the engine is started, more fuel is required than in running. At starting, fork lever 1 is
pulled rightward by starter spring because ball weights have no centrifugal force. Control rack
moves
to a position for overlimit discharging of fuel to assure easy starting.
At start
1. Ball Weights
2.
Start Spring
3. Fork Lever 1
4. Control Rack
At
Idling
When speed control lever is set at idling position after the engine is started, high speed
governor spring 1 does not work
at all and also low speed governor spring 2 does only a
little action. Therefore, governor sleeve is pushed leftward by a centrifugal force of ball
weights. Fork lever 1 and control rack are moved leftward by the sleeve and then idling limit
spring is compressed by control rack. As a result, the control rack is kept at a position where
a
centrifugal force of ball weights and forces start spring, governor spring 2 and idling limit
spring are balanced, providing stable idling.
At idling
1. Speed Control Lever
2. Governor Spring 1
3. Governor Spring 2
4. Ball Weight
5. Governor Sleeve
6. Fork Lever 1
7. Control Rack
8. Idling Limit Spring
9. Start Spring
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