Electronically controlled brake booster and method of operation thereof

Electronically controlled brake booster for a motor vehicle brake system, comprising

• a housing having a vacuum chamber and a servo chamber separated from said vacuum chamber by a movable wall,
• a control valve unit operable by an electromagnet arrangement, said control valve unit being coupled to said movable wall for common relative movement with respect to said housing of said brake booster, said electromagnet arrangement being connectable to an electronic control unit (ECU) generating a drive signal (I.sub.26) to operate said electromagnet arrangement,
• a braking pressure generation unit being operatively connected to said movable wall for generating a braking pressure for at least one brake of said motor vehicle in dependence from the position of said movable wall, characterized in that
• said drive signal (I.sub.26) is generated in said electronic control unit (ECU) in dependence from at least one control parameter (K, T.sub.I, T.sub.D ;
• p.sub.1, q.sub.0, q.sub.1, q.sub.2), and
• said at least one control parameter (K, T.sub.i, T.sub.D ;
• p.sub.1, q.sub.0, q.sub.1, q.sub.2) being adjusted in dependence from a dead time (T.sub.t) of said braking pressure between supplying said electromagnet arrangement with said drive signal (I.sub.26) and a rising of said braking pressure in response thereto.