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Automated Manual Transmission
7
On-Off Solenoid Valves for Controlling The
Position Selection Actuator:
The control current ranges from 0 to 2.5 A
and is controlled directly by the control unit.
The electrical resistance from the winding is
5.1 ohm +/- 6% at 20°C.
Operation:
1. When the two solenoid valves are not op-
erated by the TCU, the spring positions
the selector in the 3/4 gear position.
2. When EV3 is operated, pressurised oil en-
ters the upper chamber of the selector,
which moves to the 1/2 gear position.
3. When EV4 is operated, pressurised oil en-
ters the lower chamber of the selector,
which moves in the 5/reverse gear posi-
tion.
Proportional Flow Rate Solenoid Valve:
It manages the clutch (EV0).It controls the oil
flow entering and leaving the clutch travel
actuator chamber (single effect). It has a
maximum flow rate of 10 l/min with a pres-
sure differential of 10 bar.
The control current ranges from 0 to 2A and
is controlled directly by the control unit. The
electrical resistance of the winding is 2.5ohm
+/-6% at 20
℃
.
Operation:
1. If the current applied to the solenoid valve
is 1 A, the oil flow is kept closed and the
CSC clutch actuator maintains its position.
2. If the current applied to the solenoid valve
is lower than 1 A, the oil flow is discharged
and the CSC clutch actuator positions itself