B3 MULTIDISK Brake Control Solenoid Valve, Component Description - GF27.19-D-5176HAG
TRANSMISSION 722.9 in MODEL 906
Exploded view of electric controller unit (Y3/8)
Location
The brake control solenoid valve B3 is positioned on the electric controller unit.
Task
The clutch control solenoid valve B3 is actuated by the control unit and influences the position of the regulating valve B3. The pressure in the multidisk brake B3 depends on the position of the regulating valve and therefore on the geometry of the regulating valve B3.
The brake control solenoid valve B3 has a rising characteristic. This means that the oil pressure applied in the B3 regulating valve increases as the actuation current increases.
In limp-home mode of the fully integrated transmission control all the control solenoid valves are de-energized. Therefore, the brake control solenoid valve B3 does not provide any pressure.
Function
In the brake control solenoid valve B3, a proportional solenoid converts the electrical signals from the control unit. The float needle can also be moved into intermediate positions as a result.
The brake control solenoid valve B3 assigns a proportional pressure to the current which is controlled by the control unit.