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

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

Regelmagnetventil Bremse B2

Fig 1: Identifying Control Solenoid Valve Components

Courtesy of MERCEDES-BENZ USA

Location

The B2 brake control solenoid valve (VGS) is mounted on the electric control unit (VGS).

Fig 2: Locating B2 Brake Control Solenoid Valve

Courtesy of MERCEDES-BENZ USA

The B2 brake control solenoid valve (VGS) is actuated by the fully integrated transmission control (VGS) control unit and influences the position of the B2/BR regulating valve. 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 B2 brake control solenoid valve (VGS) 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 B2 brake control solenoid valve (VGS) thus supplies no pressure.

Body

In the B2 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.

Function

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