Regulator Valve
The regulator valve regulates the line pressure, and also supplies the fluid to the lubricating system and torque converter.
To regulate the line pressure, the regulator valve passes the fluid from the ATF pump through the lubricating system and
the torque converter, and the regulator valve receives line pressure control pressure.
The fluid from the ATF pump flows through B and B'. The fluid entering from B flows through the regulator valve orifice to
the A cavity. This pressure of the A cavity pushes the regulator valve to the right side. The line pressure control pressure
flows to the right side of the regulator valve, and pushes the regulator valve to the left side. As a result, the regulator valve
stays at a certain position, and maintains it to regulate line pressure. The line pressure control pressure increases accord-
ing to the throttle opening (throttle B pressure), while the line pressure increases according to the line pressure control
pressure. The line pressure can be regulated a wide range by the line pressure control pressure.
NOTE: When used, "left" or "right" indicates direction on the illustration below.
ENGINE NOT RUNNING ENGINE RUNNING
To Torque Converter LINE PRESSURE CONTROL PRESSURE
REGULATOR VALVE ORIFICE
A CAVITY
REGULATOR VALVE
To Lubricating System
LINE PRESSURE from ATF PUMP
Stator Reaction Hydraulic Pressure Control
Hydraulic pressure increases according to the torque is performed by the regulator valve using the stator torque reaction.
The stator shaft is splined with 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), the 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 reac-
tion spring compresses, and the regulator valve moves to increase the line pressure which is regulated by the regulator
valve. The line pressure reaches its maximum when the stator torque reaction reaches its maximum.
TORQUE CONVERTER
REGULATOR VALVE
REGULATOR VALVE
BODY
STATOR
(Inside torque converter)
REGULATOR
SPRING CAP
STATOR SHAFT ARM
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