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

TRANSMISSION 722.9 in MODEL 164.1/8, 216, 221, 251.0/1 up to Model Year 8

Regelmagnetventil Bremse B3

Fig 1: Identifying Control Solenoid Valve Components

Courtesy of MERCEDES-BENZ USA

Location

The B3 brake control solenoid valve (VGS) is mounted on the electric control unit (VGS).

Fig 2: Locating B3 Brake Control Solenoid Valve

Courtesy of MERCEDES-BENZ USA

Task

The B3 brake control solenoid valve (VGS) is actuated by the fully integrated transmission control (VGS) control unit and influences the position of the B3. regulating valve. The pressure in the B3 multi-disk brake depends on the position of the regulating valve and thus on the geometry of the B3 regulating valve.

Body

In the B3 brake control solenoid valve (VGS) a proportional solenoid converts the electrical signals from the fully integrated transmission control (VGS) control unit (Y3/8n4). The float needle can also be moved into intermediate positions as a result.

The B3 brake control solenoid valve (VGS) 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 (VGS) all the control solenoid valves are de-energized. The B3 brake control solenoid valve (VGS) thus supplies no pressure.

Function

The B3 brake control solenoid valve (VGS) assigns a proportional pressure to the current which is controlled by the fully integrated transmission control (VGS) control unit.