Honda Civic 1998 Service Manual page 461

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 torque convener. The 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, and the relief valve and regulator
valve moves 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 the fluid from B' through D and C also changes. This operation is continued, maintaining the
ltne pressure.
NOTE: When used, "left" or "right" indicates direction on the illustration below.
ENGINE NOT RUNNING
STATOB SHAFT ARM
Stator Reaction Hydraulic Pressure Control
Hydraulic pressure increases according to torque, are 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 Dressure reaches its maximum when the stator torque reaction reaches its maximum.
TOROUE CONVERTER
REGULATOR VALVE
TOR SPRING CAP
ENGINE RUNNING
To TOROUE CONVERTER Lubrication
'..- _..-7
3f
{cont'd)
STATOR SHAFT
ATOR SHAFT ARM
14-21