Societe Anonyme D.b.a.

Bendix Europe Services Techniques

Jean-Marc Cheron

Jean-Jacques Carre

Gilbert Kervagoret

The invention relates to a pressure-regulating device for a hydraulic circuit comprising at least one generator (30) of pressurized fluid, a hydraulic motor (28) and a reservoir (32) of fluid under low pressure, and including an electrovalve controlled by a calculator and comprising, in a yoke (8), an electric coil (10) and a sliding magnetic core (12) controlling a slider (16) sliding in a bore provided in a body (18), the slider (16) defining two chambers (22, 36) arranged on either side of the slider (16) in the bore, the slider comprising a hydraulic enclosure (40) communicating with the hydraulic motor (28) and defining a reaction force supplementing the force generated by the coil (10), counter to a prestressed resilient mechanism (20), the enclosure (40) consisting of a blind bore made in the slider (16), a needle (42) closing the enclosure (40) in a substantially leaktight manner, while a radial pierced hole (44) connects it to a groove ( 34) provided at the periphery of the slider (16). According to the invention, the needle (42) bears on a cup (46) which is stationary with respect to the yoke (8) of the electric coil (10).

Pressure-regulating device for a hydraulic circuit

The invention concerns a braking corrector (10) of the type incorporating at least one piston (16, 16') provided with a passage joining the inlet chamber (18, 18') and the outlet chamber (22, 22') to one another, a valve (26, 26') controlling the communication through the passage, a control device (34) generating a pilot force which is capable of being applied to the piston (16, 16'), pushing the latter in the direction of opening of the valve (26, 26'); the invention provides the corrector (10) with a device (52) for monitoring the pilot force which is capable of limiting the latter when the reaction force generated by the pressure on the piston (16, 16') exceeds the pilot force by a predetermined amount.

Safety device on a braking corrector

The compensator (20) comprises a housing in which there are disposed a compensator piston (30) between an inlet chamber (38) and an outlet chamber (42), and a pilot piston (48) between the outlet chamber (42) and a pilot chamber (52), the two pistons controlling a compensator valve (46) disposed in a passage (44) connecting the inlet and outlet chambers. A pilot valve (90-92) controlled by an inertia weight (72) is mounted in a passage (82, 80, 70, 88, 84, 86) connecting the inlet chamber (38) and the pilot chamber (52). A spring (94) returns the weight (72) in the direction of opening of the pilot valve (90-92). According to the invention, the spring (94) is interposed between the compensator piston (30) and the inertia weight (72). A compensator of this type is used in the braking systems for motor vehicles.

Deceleration-controlled braking compensator for a motor vehicle

The tandem master cylinder is provided with an equalizer device comprising a plunger mounted intermediate two chambers which are respectively connected to the two cavities of the master cylinder. At least one of the ducts connecting the master cylinder and the equalizer device is formed with a constriction slowing down the flow of brake fluid so as to permit a pressure buildup in one of the braking circuits, in case of failure of the other circuit, since the very start of the pedal stroke.

Growing community of inventors

Longperrier, France

Jean-Marc Cheron