Control solenoid valve component description - GF27.19-P-5147CWF

TRANSMISSION 722.9 in MODEL 204.0 up to Model Year 8

Control solenoid valve disk brake control B2

Fig 1: Identifying Control Solenoid Valve Components

Courtesy of MERCEDES-BENZ USA

Location

The multidisk brake control solenoid valve B2 is mounted on the fully integrated transmission control controller unit.

Fig 2: Identifying Fully Integrated Transmission Control Unit (B2)

Courtesy of MERCEDES-BENZ USA

Task

The multidisk brake control solenoid valve B2 is actuated by the fully integrated transmission control unit and influences the position of the regulating valve B2/BR. The pressure in the multi-disk brake B2 and pressure in the multi-disk brake BR depend on the regulating valve position and thus on the geometry of the regulating valve B2/BR. The multidisk brake control solenoid valve B2 has a rising characteristic.

This means that the oil pressure applied in the B2/BR regulating valve increases as the actuating current increases. In limp-home mode of the fully integrated transmission control (VGS) all the control solenoid valves are de-energized. The multidisk brake control solenoid valve B2 thus supplies no pressure.

Body

In the multidisk brake control solenoid valve B2, a proportional solenoid converts the electrical signals from the fully integrated transmission control unit. The float needle can also be moved into intermediate positions as a result.

Function

The multidisk brake control solenoid valve B2 assigns a proportional pressure to the current which is controlled by the fully integrated transmission control unit.