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Regulator Valve
The regulator
valve
maintains
constant hydraulic
pressure from
the ATF
pump
to
the
hydraulic control
system,
while
also
furnishing fluid
to the
lubricating system
and
torque
converter.
Fluid from the ATF
pump
flows through Band B'. Fluid
entering
from
8 flows through
the
valve orifice
to the
A cavity.
This
pressure of the A cavity pushes the regulator valve to
the right
side, and
this
movement of
the regulator
valve
uncovers the fluid port to the torque
converter and
the
relief
valve.
The
fluid
flows
out to the
torque
converter and the
relief valve,
and the
regulator
valve moves
to
the
left
side.
According to the level of the hydraulic pressure
through
8, the position
of
the regulator
valve changes
and
the amount of
fluid
from
B' through
the
torque
converter also
changes.
This
operation is continued.
maintaining
the line pressure.
NOTE:
When
used,
"left" or
"
right" indicates direction on
the
illustration below.
ENGINE NOT RUNNING
ENGINE RUNNING
To TORQUE
CONVERTER
Lubrication
STATOR SHAFT ARM
t t
"om
A TF PUMP
Stator Reaction Hydraulic Pressure Control
Increases in
hydraulic pressure according to torque are performed by
the
regulator valve
using
stator
torque reaction. The
stator shaft is splined to
the
stator
in the
torque converter, and its
arm
end contacts
the regulator
spring cap.
When the
vehicle
is accelerating
or climbing
(Torque Converter Range), stator
torque
reaction acts
on the
stator shaft, and
the stator
arm
pushes
the regulator
spring cap
in the direction
of
the arrow in proportion to the
reaction.
The
stator
reaction spring
compresses, and
the regulator
valve moves to increase the line
pressure.
Line pressure reaches
its maximum when
the
stator torque
reaction reaches
its
maximum.
TORQUE COINVI,RnER
REGULATOR VALVE
STATOR REACTION
.,f
!
,
,
SPRING CAP
STATOR
STATOR SHAFT
~T,.Tr'A
SHAFT ARM
(cont'd)
14-27
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