At No-Load Maximum Speed Control - Yanmar 4TNV98 Service Manual

At No-Load Maximum Speed Control

Figure 7-28
When the engine revolutions increase and the
flyweight centrifugal force exceeds the governor
spring set force, the governor sleeve moves to
make the governor lever assembly turn clockwise
with fulcrum M . As a result, the control sleeve
2
moves in the direction of no-injection (to the left) for
controlling speed so as not to exceed the full-load
maximum speed.
When the accelerator pedal is not pressed down
fully, the set force of the governor spring changes
accordingly in order to achieve governor control
based on the governor spring set force during
partial load operation.
4TNV98 & 4TNE98 Diesel Engine Section 4. Fuel System
185