Method for determining a brake booster amplification

Details Method for determining a brake booster amplification Method for determining a brake booster amplification

2005-09-27

2005-09-27

Lazo, Thomas E. (Department: 3745)

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

C303S155000

Reexamination Certificate

active

06948416

ABSTRACT:
The invention relates to a process and a device for determining the instantaneous value of the amplification provided by a pneumatic-assistance servomotor (14) in a braking device for a motor vehicle, wherein instantaneous values of the relative vacuum level inside the negative-pressure chamber (24) of the servomotor and of the hydraulic pressure at the exit from the master cylinder (16) are measured using sensors (28and30), and wherein output signals provided by said sensors are processed by data-processing means (32) so as to compute a pressure difference (ΔP), proportional to the instantaneous amplification provided by the servomotor and, if required, an instantaneous value of the pressure (Prc) inside the working chamber (26) of the servomotor.

REFERENCES:
patent: 4934249 (1990-06-01), Gautier et al.
patent: 5967628 (1999-10-01), Abe et al.
patent: 6234589 (2001-05-01), Yoshida
patent: 6289271 (2001-09-01), Isono et al.

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