8.
GOVERNOR
8-1
CONSTRUCTION
and
OPERATION
In the model EC05-2,
07-2,
10,
17
and
25-2
engines, a centrifugal flyweight type governor
is
used. The governor plate com-
plete, governor sleeve and governor arm are installed
in
the governor chamber (EClOD,
lev,
17D and
25-2D),
in
the crank-
case (EC05-2D, 07-2D) or
in
the reduction chamber (type
B
and
V),
and lubricated
by
the lubricating
oil
(in the model
EC05-2,
07-2,
by the mixture fuel).
As
the engine speed fluctuates, flyweight on the governor plate complete, rotating together with the crankshaft, changes its
opening angle and moves the governor sleeve, which in turn rotates the governor shaft through the governor arm. The gover-
nor lever
is
connected to the extending
part
of the governor shaft and this governor lever
is
connected to the carburetor throt-
tle lever through
the
governor rod at the other end; thus the throttle valve
is
opened
or
closed and engine speed and output
are controled.
When the crankshaft rotation increases, all the relevant members move
in
the direction indicated by-marks and the car-
buretor throttle valve closes, reducing the fuel supply and consequently reducing the speed and output. When the crankshaft
rotation decreases, the same members
moie
in
the direction indicated by-- --marks and the carburetor throttle valve open,
increasing the fuel supply and consequently recovering the failing speed and output.
GOVERNOR
ROD
SPRING GOVERNOR
ROD
THROTTLE LEVER
THROTTLE VALVE
CARBURETOR
GOVERNOR LEVER
FLYWEIGHT
GOVERNOR
ARM
STOPPER
PLATE
CRANKSHAFT
HIGH SPEED STOPPER
GOVERNOR SLEEVE
GOVERNOR SPRING
BOLT
CONTROL
LEVER-
Fig.
8-
1-
1
Model
ECO5-2,
07-2
-
32
-
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