Abstract: In order to address a problem with the effectiveness of a brake booster device, provision is made for the latter to be produced in the form of hydraulic servo control. In such an instance, a master cylinder (7-10) of a braking circuit (3-4) is provided with a pressure chamber (19) upstream of the braking circuit. This pressure chamber is then subjected to an injection (28) of hydraulic fluid by a pump (34). The pump is operated (39) according to the braking requirements. The servo control comprises a set of moving gear (54) sensitive to these requirements and that work an injection valve (29-30).

Abstract: In order to prevent a vehicle fitted with braking assistance and trajectory correction devices and having a highly placed center of gravity from overturning in a bend when there is a sudden turn of the steering wheel at the same time as a sudden braking action, a hydraulic braking circuit comprising a hydraulic pump (3) which sucks a fluid contained in a reservoir (3) through a master cylinder (1), is provided with a bladder (10). The bladder, placed between the master cylinder and the hydraulic pump, reduces the duration of flow of the hydraulic fluid to the pump, ensuring a sufficient suction pressure at the entrance of the pump in order to cram the brake and cause the wheel having the most pressure to skid.

Abstract: A method of detecting the braking of a vehicle comprising a push rod (200) intended to transmit an amplified braking command to a master cylinder. A plunger (220), arranged parallel to the primary piston (200) so as to reproduce the movements of this piston, and a sensor (230) which senses the movements of the plunger (220), this sensor (230) being fastened to the booster (250), are used to detect a braking operation by detecting a movement of the plunger (220).

Abstract: The linear sensor 1 for measuring an axial path L0 of a part 2 sliding in an axial direction 20 in a frame 3 comprises a mobile part 4 cooperating with a fixed part 5, said mobile part 4 comprising: a longitudinal element 40 cooperating at one end 400 with said part 2, any translation of said part 2 in said axial path causing a corresponding displacement of its other end 401; and a magnetic field source 41 integral with the end 401, said fixed part 5 comprising a receiving means 50 for said magnetic field. The linear sensor is characterized in that said fixed part 5 comprises an angular redirection means 53 cooperating with said longitudinal element 40 and thus transforming said axial path of the end 400 into a radial path of the other end 401.

Abstract: In order to address a problem with the effectiveness of a brake booster device, provision is made for the latter to be produced in the form of hydraulic servo control. In such an instance, a master cylinder (7-10) of a braking circuit (3-4) is provided with a pressure chamber (19) upstream of the braking circuit. This pressure chamber is then subjected to an injection (28) of hydraulic fluid by a pump (34). The pump is operated (39) according to the braking requirements. The servo control comprises a set of moving gear (54) sensitive to these requirements and that work an injection valve (29-30).

Abstract: The linear sensor 1 for measuring an axial path L0 of a part 2 sliding in an axial direction 20 in a frame 3 comprises a mobile part 4 cooperating with a fixed part 5, said mobile part 4 comprising: a longitudinal element 40 cooperating at one end 400 with said part 2, any translation of said part 2 in said axial path causing a corresponding displacement of its other end 401; and a magnetic field source 41 integral with the end 401, said fixed part 5 comprising a receiving means 50 for said magnetic field. The linear sensor is characterized in that said fixed part 5 comprises an angular redirection means 53 cooperating with said longitudinal element 40 and thus transforming said axial path of the end 400 into a radial path of the other end 401.

Abstract: A method of detecting the braking of a vehicle comprising a push rod (200) intended to transmit an amplified braking command to a master cylinder. A plunger (220), arranged parallel to the primary piston (200) so as to reproduce the movements of this piston, and a sensor (230) which senses the movements of the plunger (220), this sensor (230) being fastened to the booster (250), are used to detect a braking operation by detecting a movement of the plunger (220).

Abstract: In order to prevent a vehicle fitted with braking assistance and trajectory correction devices and having a highly placed center of gravity from overturning in a bend when there is a sudden turn of the steering wheel at the same time as a sudden braking action, a hydraulic braking circuit comprising a hydraulic pump (3) which sucks a fluid contained in a reservoir (3) through a master cylinder (1), is provided with a bladder (10). The bladder, placed between the master cylinder and the hydraulic pump, reduces the duration of flow of the hydraulic fluid to the pump, ensuring a sufficient suction pressure at the entrance of the pump in order to cram the brake and cause the wheel having the most pressure to skid.

Abstract: The invention proposes a master cylinder 1 with a device for detecting actuation of a braking system. The detection device is fixed to a body 2 of the master cylinder 1 at a pressure chamber 5. The detection device comprises a magnetic circuit 9 able to be opened and closed by a moving magnetic piece 19. The moving magnetic piece 19 is, for example, fixed to a piston 4 of the master cylinder 1. Actuation of a brake pedal causes the piston 4 and the moving piece 19 to advance in the master cylinder 1. The magnetic circuit 9 therefore changes state (opened or closed). The change in state of the magnetic field switches the brake lights on and off.

Abstract: A sensor module including a processing unit, a stroke sensor and a force sensor (3) for obtaining data relating to both a force exerted on an axially-moving rod (1) and the travel of the rod through a determination of the position of the piston (2) with respect to the rod (1). The sensor module is characterized by a first stationary electrical coil (5) that is arranged about the piston (2) and the rod (1) and a second moving electrical coil (6) that is disposed about the rod (1) and connected to the force sensor (3). The first (5) and second (6) coils are coaxial and as a result induced oscillatory voltage within the stationary coil (5) generates an eddy current within the piston (2) that permit a measurement of the stroke of the piston (2) by means of eddy-current signal received by the stroke sensor using the piston (2) as a test body, and supplying the force sensor with electrical power through the second moving electrical coil (6).

Abstract: The invention proposes a master cylinder 1 with a device for detecting actuation of a braking system. The detection device is fixed to a body 2 of the master cylinder 1 at a pressure chamber 5. The detection device comprises a magnetic circuit 9 able to be opened and closed by a moving magnetic piece 19. The moving magnetic piece 19 is, for example, fixed to a piston 4 of the master cylinder 1. Actuation of a brake pedal causes the piston 4 and the moving piece 19 to advance in the master cylinder 1. The magnetic circuit 9 therefore changes state (opened or closed). The change in state of the magnetic field switches the brake lights on and off.

Abstract: The invention relates to a position or displacement sensor comprising a detection circuit and a rider (2), the position of which is detected by the detection circuit, this rider (2) comprising a support (20) consisting of a material inert to the detection circuit, and an influencing member (21) carried by the support (20) and comprising a material that is active to the detection circuit. The influencing member (21) is produced in the form of particles (P) of the active material which are embedded in a mass (M) of the inert material to measurement of the displacement or position of a motor vehicle braking system piston.

Abstract: This invention relates to a sensor module, comprising a processing unit, a stroke sensor and a force sensor (3), and capable of determining, inside the associated pneumatic servomotor for an assisted braking, data concerning both the force exerted on an axially-moving rod (1), and the travel of said rod (1), by the determination of the position of the piston (2) coupled to the rod (1).

Abstract: In order to solve the problem of the passing of an elbow piece (15) with a right-angle bend (16) through an opening (21) in a seal (19), said seal (19) is provided with a deformable slot (20). The tightness of the system, consisting of the seal (19) and the elbow piece (15), results from the existence of fir-branch shaped protrusions (27) on the base (26) of the elbow piece (15).

Abstract: A servobrake having a rigid jacket defined by a first shell joined to a second shell by through tie-bars to create variable volume front and rear chambers. The front chamber is permanently connected to a first pressure source whereas the rear chamber is selectively connected to the first pressure source and a second pressure source. The servobrake including a pressure sensor for the measurement of the pressure inside of the front and rear chambers. The pressure sensor is characterized by being attached to a front end of the through-tie bar whereas the tie-bar is characterized by a hollowed-out body with a hollow inner needle sealingly retained therein. The hollow inner needle defines a first chamber while a second chamber is defined by a space between the inner hollow needle and the hollowed-out body. The hollowed-out body has first ports therein for connecting the rear chamber with the first chamber through which pressure present in the rear chamber is transmitted to the pressure sensor.

Abstract: A pneumatic servobrake having a detector (13) for the measurement of the pressure in a front chamber (1). The detector (13) has a baseplate (14) that is situated opposite an opening (25) in a wall (26) of the front chamber (1). A yoke-forming cage (38) that is placed over the opening (25) has an opening (40) that is traversed by a pressure sampling tube (16). The tube has a collar (41) that is retained between the cage (38) and the baseplate (14). An adapter (23) connected to the wall (26) urges the tube (16) against the cage (38) to allow for both a sideways motion (20) and a tilting motion (21). The lower part (31) of the tube (16) is fitted with an O ring (33) to establish a sealed pneumatic connection between the tube (16) and baseplate (14) such that a first sensor (15) is isolated from a second sensor (48) in a measurement of pressure in the first chamber (1).

Abstract: A hydraulic capacity having a hollow body (2) made of a rubber material and a rigid body (3) which surrounds the hollow body (2) to limit the expansion of the hollow body (2). The hydraulic capacity containing at each instant an instantaneous volume (V) of fluid to which an instantaneous pressure is applied as a function of the instantaneous volume (V). The hollow body (2) has a wall (21) which is simultaneously in contact with the casing (3) and at least via of a first zone (Z1) and a second zone (Z2). The first zone (Z1) has a first thickness (E1) and the second zone (Z2) has a second thickness (E2) which are separated from each other by a third zone (Z3) having a third thickness (E3). The third zone (Z3) being separated from the casing (3) and the third thickness (E3) being different than the first (E1) and second (E2) thickness such that an instantaneous pressure (P) of the fluid is controlled according to a predefined relationship.

Abstract: The present invention relates to a device for the assembly and disassembly of a first pair (12) and of a second part (10), the first part (12) being securely attached to a first member (14) co-operating with a second member (22) retaining the second part (10) on the first (12). According to the invention, the first member (14) is a stud formed of a shank (16) and of a head (18) and the second member (22) is composed of a sleeve (24) in which slides a piston (26).