Control solenoid valve, task - GF27.19-P-5111-01E
Transmission 722.9 in model 171.4, 203, 209, 211, 215, 219, 220, 230, 463.303/340/341 B1 brake control solenoid valve
The brake control solenoid valve B1 (VGS) (Y3/8y5) is actuated by the fully integrated transmission control unit (VGS) (Y3/8n4) and influences the position of the regulating valve B1. The pressure in the multidisk brake B1 depends on the regulating valve position and therefore on the geometry of the regulating valve B1.
The B1 brake control solenoid valve (VGS) (Y3/8y5) has a lowering 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 brake control solenoid valve B1 (VGS) (Y3/8y5) thus supplies maximum pressure.