Mazda 2004 RX-8, Особенности сервиса

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AUTOMATIC TRANSMISSION
05–13–34
LINE PRESSURE CONTROL OPERATION
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•
Line pressure switches to high or low pressure in accordance with line pressure switching pre-programmed in
the TCM.
•
If the pressure control solenoid valve is
energized, line pressure switches to the low-
pressure side; if the pressure control solenoid
valve is de-energized, line pressure switches to
the high-pressure side.
•
Line pressure generated by the oil pump
(discharge pressure) acts on the area marked A
on the pressure control valve. It, however, does
not act if the pressure control valve is turned on
by a signal relayed from the TCM. Thus line
pressure is regulated to match the spring force
acting on the right side of the pressure control
valve. If the pressure control solenoid turns off,
solenoid pressure acts and line pressure is
regulated to match the spring force and solenoid pressure acting on the right side of the pressure control valve.
As a result, line pressure is decreased when the pressure control solenoid valve is on, and increased when it is
off.
•
Line pressure, which acts only in D, S, or L range, acts on the area marked B on the pressure control valve.
Thus, the pressure control valve moves in the direction in which oil is drained, and line pressure is decreased
by an amount equal to the surface area marked B.
End Of Sie
HIGH
PRESSURE
LOW
PRESSURE
OIL
PRESSURE
SOLENOID ON
D RANGE
P, N, R POSITION
SOLENOID OFF
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PRESSURE
CONTROL VALVE
PRESSURE
CONTROL
SOLENOID
SOLENOID PRESSURE
SOLENOID
PRESSURE
SPRING
X
DRAIN
LINE PRESSURE
TO CONTROL VALVES
(REGULATED)
LINE PRESSURE:
ACTS ONLY IN
D RANGE
LOWER PASSAGE
OPENS WHEN
SOLENOID
PRESSURE ACTS UPPER PASSAGE
OPENS WHEN
SOLENOID PRESSURE
DOES NOT ACT
A
B
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