Esp Pressure Build-Up Control Mode

Fig 1: ESP Control Mode, Function

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The control process and valve positions shown in the figure relate to the FR brake. A brake intervention to stabilize the vehicle is introduced by the ESP control module. At the start of ESP control, the switchover solenoid (y8) is opened, solenoid valve (y18) is switched to the "shut-off position" (closed) and the high pressure and return pump (p1) is actuated. Inlet solenoid (y22) is only opened during the pressure build-up phases.