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the space from
I
to
IS
increases
space from
15
to
the
drain port
simultaneously
decreases
As
a
resull
governor pressure
of
15
increases
and the governor pressure is balanced
with the
sum
of
centrifugal
force and
spring
force
The
governor
pressure
thus
changes
in
response
to
the vehicle
speed change centrifugal
force
Operation
of
prlmar
governor valve
The
valve
is
an
ON
OFF
valve
which
closes the
governor
pressure
IS
regulated
by
the
secondary
gover
nor
valve when the vehicle reaches the
minimum
speed
and when the vehicle
speed
exceeds
a
certain
level
the
governor opens and forwards the
gov
ernor
pressure
15
to
the control
valve
When
the vehicle is
stopped
the
governor
pressure
is
zero
However
when the vehicle
is
running slowly
this valve is
depressed
to
Ihe
center
and the groove
to
15 is closed since
the governor pressure
applied
to
the
ring
shaped
area
is
higher
than the
centrifugal
force of this valve When
the governor
speed
exceeds
a
certain
revolution
the governor pressure
in
the
circuit
15
also increases
How
ever
as
the
centrifugal
force increases
and exceeds the governor pressure this
valve
moves
toward the outside and
the governor pressure
is
transmitted
to
the circuil
5
Two different valves
are
employed
in
the governor
so
that it will inde
pendently
control the
speed
at
high
and low
speeds
That
is
within
the
low
speed
range
the
governor
pressure
is
not
generated
because of the
primary
valve whereas
at
the
high speed
range
above
the
breaking point
governor
pressure is
regulated
by
the
secondary
valve
The
breaking
point
is the
point
at
which the function
of
one
of the
governor is
transferred
to
the other
as
the
speed
changes
from
the
low
speed
to
the
high
speed
range
Automatic Transmission
To
onlml
valve
l
Governor
pre S1I
1I5 j
I
Q J
J
f
1
1
CID
l
l
m
Line
pressure
t
D@
I
Primary
governor
2
Secondary governor
3
Governor valve
body
AT090
4
Oil di
lributor
5
Output
sh lft
Fig
AT 7 Cr05s sectionallliew
of
governor
CONTROL
VALVE
ASSEMBLY
Ai09
Fig
AT S
Output
shaft
with oil
distributor and
overnor
r
@
@
0
aBUlllI8
iUQlli
V
JlAU
I
Oil distributor
2
Governor
nlve
body
A
T092
3
Primary
governor
valve
4
Secondary
governol
valve
Fig
A T 9
Exploded
view
of
governor
Flow cbar of control valve system
Oil from
pump
Regulator
valve
1
I
i
j
Throttle valve
I I
l
Manual valve
I
I
I
I
I
I
I
L
n
L
j
Speed change
valve
I
I
t
t
I
I
I
I
I
I
Governor
I
I
valve
I
I
I
L
L
1
II
Auxiliary
valve
Line pressure
j
Clutch and brake
The control valve
assembly
receives
oil
from
the
pump
and
individual
signals
from
the
vacuum
diaphragm
and transmits the individual line pres
sures
to
the transmission friction
ele
ment
torque
converter
circuit
and
lubricating
system
circuit
as
outputs
More
specifically
the oil from
the
oil
pump
is
regulated by
the
regulator
valve
as
line pressure build up
the
line
pressure
is
fed
out
from the control
valve
assembly through
various
direc
AT
6
tion
changeover
valves
including
ON
OFF valve
and
regulator
valves
are
newly
reformed
to
a
throllle
system
oil pressure
and
operate
other valves
Finally
the line pressure
is
transmilled
to
the
required
dutch
or
brake
servo
pisJon
unit in
response
to
the individu
af
running
conditions after
re
ejving
signals
from
the
va
uum
diaphragm
downshift
solenoid
governor
V
dlvc
and
or
manual
linkage
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