SOLENOID VALVE FUNCTION


BHE051321101T05

• All solenoid valves have superior responsiveness to hydraulic control.

• The solenoids have the following functions.

1
Shift solenoid C
2
Shift solenoid F
3
Pressure control solenoid
4
TCC solenoid
5
Shift solenoid B
6
Shift solenoid A

Function chart

Solenoid

Type

Characteristics

Function

Pressure control solenoid
ON/OFF
Normal high (Supplies solenoid pressure to pressure control valve)
Set high or low line pressure depending on whether solenoid is energized or de-energized
Shift solenoid A
Repeats ON and OFF at 50 Hz (20 ms cycle); duty cycle type
Normal high (Supplies solenoid pressure to amplifier valve)
Controls supply and drainage of solenoid pressure, according to change in on-time ratio (0-100%) for one cycle
Controls amplifier valve, regulates low clutch pressure
Shift solenoid B
Controls amplifier valve, regulates 2-4 brake pressure
Shift solenoid C
Controls amplifier valve, regulates high clutch pressure
Shift solenoid F
Controls amplifier valve, regulates low and reverse brake pressure
TCC solenoid
Normal low (Drains solenoid pressure supplied to amplifier valve)
Controls TCC engagement and disengagement