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

TRANSMISSION 722.9 in MODEL 204.0 up to Model Year 8

Control solenoid valve disk brake control B1

Fig 1: Identifying Control Solenoid Valve Components

Courtesy of MERCEDES-BENZ USA

Location

The multidisk brake control solenoid valve B1 is mounted on the fully integrated transmission control controller unit.

Fig 2: Identifying Fully Integrated Transmission Control Unit (B1)

Courtesy of MERCEDES-BENZ USA

Task

The multidisk brake control solenoid valve B1 is actuated by the fully integrated transmission control unit and influences the position of the regulating valve B1. The pressure in the multidisk brake B1 depends on the position of the regulating valve and therefore on the geometry of the regulating valve B1. The multidisk brake control solenoid valve B1 has a falling characteristic.

This means that the oil pressure applied in the regulating valve B1 reduces as the actuation 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 B1 thus supplies maximum pressure.

Design

In the multidisk brake control solenoid valve B1, 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 B1 assigns a proportional pressure to the current which is controlled by the fully integrated transmission control unit.