METHOD FOR CALIBRATING A MODULATION POINT OF A PNEUMATIC BRAKE BOOSTER WHICH IS CALCULATED ON THE BASIS OF A PRESSURE SENSOR SIGNAL

• Main Authors: BUSSMANN OTMAR, BRUEX THOMAS
• Format: Patent
• Language: English; Korean
• Published: 29.11.2013
• Subjects: ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; PERFORMING OPERATIONS; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES; TRANSPORTING; VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES; VEHICLES IN GENERAL

The invention relates to a method for calibrating a modulation point of a pneumatic brake booster (10) which is calculated from the at least one pressure sensor signal, in which method the vacuum pressure of a vacuum chamber and/or the working pressure of a working chamber of the brake booster (10) are/is determined by means of a pressure sensor (11) which generates the pressure sensor signal, and the vacuum chamber of the brake booster (10) can be operatively connected to a master brake cylinder (20) in order to generate a master brake cylinder pressure as a function of the pedal travel of a brake pedal (30); according to the invention the following method steps are provided: a) determination of the master brake cylinder pressure (pH) and of the pedal travel (sp), b) generation of the quotient (pH/sp) from the master brake cylinder pressure (pH) and pedal travel (sp), c) determination of a local maximum value (4) of the profile of the quotient (pH/sp) formed from the master cylinder pressure (pH) and the pedal travel (sp), d) determination of a further modulation point as that value of the master brake cylinder pressure (pH) which corresponds to the local maximum value (4) determined in method step c), and e) correction of the calculated modulation point by means of the further modulation point which is determined in method step d).