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Regulator Valve
The regulator valve maintains a constant hydraulic pressure from the ATF pump to the hydraulic control system, while
also furnishing fluid to the lubricating system and the torque converter.
Fluid from the ATF pump flows through B and B'. The regulator valve has a valve orifice. The fluid entering from B flows
through the 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. The relief valve and regulator valve move to the left side.
According to the level of the hydraulic pressure through B, the position of the regulator valve changes, and the amount of
fluid from B' through D and C also changes. This operation is continued, maintaining line pressure.
Stator Reaction Hydraulic Pressure Control
Hydraulic pressure increases according to torque are performed by the regulator valve using 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), stator torque reaction acts on the stator shaft, and the stator
arm pushes the regulator spring cap in the
and the regulator valve moves to increase the line pressure which is regulated by the regulator valve. Line pressure reaches
its maximum when stator torque reaction reaches its maximum.
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direction in proportion to the reaction. The stator reaction spring compresses,
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