METHOD FOR ESTIMATING THE PRESSURE IN A VACUUM RESERVOIR OF A SERVO BRAKE

摘要

The invention relates to a method for estimating the pressure (Pass) in a vacuum reservoir (28) of a vacuum servo brake (26) of a motor vehicle (10), the vehicle (10) comprising: - a braking device (16) controlled by the pressure (Pmc) of a brake fluid; - a servo brake (26) using a vacuum provided by a reservoir (28) supplied by vacuum means (29); - a pressure sensor (23) for measuring the braking pressure (Pmc); characterized in that it comprises: - a step (E2) for calculating the amplitude (ΔPmc) of a reduction in braking pressure; - a step (E3) for estimating the increase (Conso) of the pressure (Pass) in the vacuum reservoir (28); - a step (E4) for calculating the return to a minimum assistance pressure (Pass_min) in the reservoir (28).