M.5
FUEL
SYSTEM
92.4mm
STROKE SERIES
WSM,01092
[6]
GOVERNOR
A1 09F019
At
start
I
0107F037
0107F038
The
governor serves to keep engine speed
constant by automatically adjusting
the
amount of
fuel supplied to
the
engine according to changes
in
the
load.
This
engine employs an all-speed governor
which controls
the
centrifugal force of the
steel
ball
(13)
weight, produced by rotation of the fuel
camshaft
(9),
and
the
tension of the governor spring
1
(2)
and
2
(3)
are
balanced.
(1) Startspring
(8)
Governor Lever
(2)
Governor Spring
1
(9) Fuel Camshaft
(3)
Governor Spring
2
(10) Governor
Ball
Case
(4)
Fork
Lever
1
(1
1)
Steel
Ball
(5)
Fork Lever
2
(1
2)
Governor Sleeve
(6)
Fork
Lever Shaft
(13)
Steel
Ball
(7)
Fork Lever Holder
Since
the
steel ball (13)
have
no centrifugal force, a
fork
lever
1
(4)
is
pulled to
the
right by
the
starter
spring (1). Accordingly, the control rack
(14)
moves
to
the
maximum injection position to assure easy
starting.
(14) Control
Rack
When the speed control lever
(15)
is
set at the
idling position after
the
engine starts, the governor
spring 1
(2)
does not work
at
all
and the governor
spring
2
(3) does only
act
slightly. The governor
sleeve (12)
is
pushed leftward by
a
centrifugal force
of
steel
ball (1 3).
Therefore,
the
fork lever
1
(4) and control rack
(14)
are moved
to
the left by
the
governor
sleeve
and
then
the idling limit spring
(16)
is
compressed by
the
control rack. As
a
result, the control rack
is
kept
at
a
position where
a
centrifugal force
of
steel
ball and
forces start spring
(l),
governor spring
2
and idling
limit spring are balanced, providing stable idling.
(1
5)
Speed Control Lever
(16) Idling Limit Spring
M-3
1
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