Jacobsen SXG323, Руководство по обслуживанию

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SERVICE MANUAL FOR SXG323&326
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4.2. GOVERNOR OPERATION
1) The control lever is released in the engine starting
position and is set in the idling position by the return
spring.
In this state no centrifugal force is applied to the
governor, so the control rack of the injection pump
is shifted by the starting spring to the position for
increased fuel supply.
2) Once the engine is stated, the governor controls en-
gine speeds automatically.
When engine speeds exceeds preset value, the
thrust plate moves by means of the centrifugal force
of the flyweights and shifts the control rack to de-
crease fuel supply providing smooth rotation. When
engine speeds come down below the specified
value, the force of the governor spring and starting
spring surpasses the centrifugal force and the thrust
peace is pushed back. Then the control rack is shift-
ed to increase fuel and thus restore engine speeds.
Engine speeds are maintained at a constant level in
his way.
Fig. 7-31
3) When the control lever is set in the full load posi-
tion, tension of the tension spring is increased and
the tension arm is in contact with the full load stop-
per. Meanwhile, the floating arm, control link, and
control rod work to control fuel supply so as to avoid
exceeding a preset maximum engine speed. Thus
full-load, maximum speed operation is possible.
When load is eliminated during loaded operation,
engine speeds increase, which lead to increased
centrifugal force of the flyweights. Then the trust
piece pushes the floating arm and the control rod
is shifted to decrease fuel. Thus over-racing is pre-
vented.