METHOD OF PRESSURE EVALUATION IN VACUUM TANK OF SERVOBRAKE Russian patent published in 2018 - IPC B60T13/52 B60T17/22 G01L11/00 

FIELD: measuring equipment.

SUBSTANCE: object of the invention is a method of evaluating the pressure (Pass) in vacuum tank (28) of vacuum servobrake (26) of motor vehicle (10), wherein the vehicle (10) comprises: a brake device (16); a servobrake (26); a pressure sensor (23). In carrying out the method, in the first step (E1), the braking pressure (Pmc) is cyclically calculated. In the second step (E2), the amplitude (ΔPmc) of pressure reduction is calculated. During the second step, the maximum (Pmc_max), and then the minimum (Pmc_min), obtained successively by the braking pressure, are stored in memory. Amplitude (ΔPmc) of the braking pressure reduction is calculated by determining the difference between the maximum (Pmc_max) and the minimum (Pmc_min). During the third step (E3), which begins after the completion of the second step (E2), the increase (Conso) of pressure in the vacuum tank (28) is evaluated as a function of amplitude (ΔPmc) calculated in the second step (E2).

EFFECT: rapid and accurate evaluation of pressure in the vacuum tank.

10 cl, 7 dwg