Braking Process In Normal Mode, Abs Pressure Build-Up Control Mode

Fig 1: ABS Closed-Loop Operation Function

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

ABS control phase begins with normal application of brakes when brake pedal is pressed. Brake pressure is built up via the two change-over solenoid valves (y18 and y19) and solenoid valves (y6, y8, y10 and y12). During an ABS control procedure, the pressure build-up phase can occur individually at each wheel. During braking under normal conditions, the pressure is built up via the same solenoid valves.