Abstract: A system for simulating brake feel for a vehicle braking installation comprising a hydraulic braking system (7, 8) and an electric braking system (9). This system comprises a first chamber (20) containing a force transmitting fluid (21) and in which there slides a hydraulic piston (22) under the control of a manual braking operating member (1), the first chamber (20) communicating with a second, secondary simulation chamber (4) via a simulation valve (3), the degree of opening of which allows a force to be simulated at the brake pedal.

Abstract: The invention relates to a system for simulating brake feel for a vehicle braking installation comprising a hydraulic braking system (7, 8) and an electric braking system (9). This system comprises a first chamber (20) containing a force transmitting fluid (21) and in which there slides a hydraulic piston (22) under the control of a manual braking operating member (1), said first chamber (20) communicating with a second, secondary simulation chamber (4) via a simulation valve (3), the degree of opening of which allows a force to be simulated at the brake pedal.

Abstract: A braking device for a motor vehicle having a first brake circuit (10) with a master cylinder (11) controlled by a brake pedal (12), a second brake circuit (20) with at least one pump (27) that is controlled by a computer (C), and a pedal travel simulation mechanism (40). The simulation mechanism (40) includes a solenoid valve (41) that is mounted in a pipe (42) connected to a hydraulic fluid storage chamber (43) and controlled by the computer (C) so as to allow the brake fluid to flow toward the chamber (43) when the second brake circuit (20) is active and when the driver presses on the brake pedal. The pipe (42) is also connected to another pipe (44) in which hydraulic fluid is displaced by a first part (45) of a control rod connected to the brake pedal (12) and second part (46) associated with the master cylinder (11).

Abstract: A braking device for a motor vehicle having a first brake circuit (10) with a master cylinder (11) controlled by a brake pedal (12), a second brake circuit (20) with at least one pump (27) that is controlled by a computer (C), and a pedal travel simulation mechanism (40). The simulation mechanism (40) includes a solenoid valve (41) that is mounted in a pipe (42) connected to a hydraulic fluid storage chamber (43) and controlled by the computer (C) so as to allow the brake fluid to flow toward the chamber (43) when the second brake circuit (20) is active and when the driver presses on the brake pedal. The pipe (42) is also connected to another pipe (44) in which hydraulic fluid is displaced by a first part (45) of a control rod connected to the brake pedal (12) and second part (46) associated with the master cylinder (11).

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 (28 and 30), and wherein output signals provided by said sensors are processed by data-processing means (32) so as to compute a pressure difference (?P), 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.

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 (28 and 30), and wherein output signals provided by said sensors are processed by data-processing means (32) so as to compute a pressure difference (&Dgr;P), 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.