摘要:
The invention concerns a master cylinder comprising a body (12) delimiting a braking fluid supply chamber (14) and at least a primary pressurizing chamber (16), a primary piston (18) separating the supply and the primary chambers, axially mobile between an inactive position and a position for pressurizing the primary chamber (14), a feeding channel (40) and means (42) for connecting said feeding channel with the supply chamber. Said connecting means (42) include two axially offset openings (44, 46), called front and rear relative to the displacement direction of the primary piston (18) during braking, the front opening (46) capable of being at least partially closed, by displacement of the primary piston (18) such that, when the primary piston (18) is in its inactive position, the cross-section of the fluid passage through said front opening (46) is minimal.
摘要:
A master cylinder assembly has a plurality of separate pressure cylinders (1) between which extends a transfer passage (17) controlled by valve means (19) to permit communication between respective pressure chambers of the cylinders when the cylinders are actuated simultaneously for normal retardation and to prevent such communication when one of the cylinders is operated individually for steering purposes. Pistons (3) are movable in the cylinders to pressurise fluid, in use, for brake actuation and hold the valve means (19) open during part of their travel. A reduced diameter rear part of each piston, when opposite the valve means, permits closure of the latter in the event of pressure failure in one of the cylinders, to enable braking pressure to be maintained in the other cylinder.
摘要:
A vehicle brake hydraulic control apparatus includes a reservoir, a hydraulic pressure pump, an orifice, a damper and a one-way valve. The reservoir absorbs an excess brake hydraulic pressure of a wheel brake. The hydraulic pressure pump suctions brake fluid absorbed by the reservoir and returns the suctioned brake fluid to a master cylinder through a return line. The orifice is provided in the return line. The damper is connected to the return line between the orifice and the hydraulic pressure pump and damps discharge pressure pulsation of the hydraulic pressure pump. The one-way valve is provided in the return line between the damper and the orifice and prevents a hydraulic flow from an orifice side to a damper side.
摘要:
A hydraulic-pressure generator including: primary and secondary pistons displaced corresponding to displacement of a brake pedal; a first pressure chamber communicating with a first hollow in the primary piston and generating in brake fluid hydraulic pressure corresponding to the displacement of the primary piston; a second pressure chamber communicating with a second hollow in the secondary piston and generating in the brake fluid hydraulic pressure corresponding to the displacement of the secondary piston; one or more first communication openings formed in a peripheral wall surrounding the first hollow; and second communication openings formed in a peripheral wall surrounding the second hollow. The flow rate of the brake fluid through the one or more first communication openings is different from the flow rate of the brake fluid through the second communication openings.
摘要:
The invention concerns a master cylinder comprising a body (12) delimiting a braking fluid supply chamber (14) and at least a primary pressurizing chamber (16), a primary piston (18) separating the supply and the primary chambers, axially mobile between an inactive position and a position for pressurizing the primary chamber (14), a feeding channel (40) and means (42) for connecting said feeding channel with the supply chamber. Said connecting means (42) include two axially offset openings (44, 46), called front and rear relative to the displacement direction of the primary piston (18) during braking, the front opening (46) capable of being at least partially closed, by displacement of the primary piston (18) such that, when the primary piston (18) is in its inactive position, the cross-section of the fluid passage through said front opening (46) is minimal.
摘要:
La présente invention a principalement pour objet un maître-cylindre comportant un corps d'axe longitudinal (X) percé d'un alésage d'axe (X), au moins un piston (10) monté à coulissement étanche dans un alésage, le piston (10) comportant une tête de piston (32) et une queue de piston (34) raccordée à la tête de piston (32) par un épaulement (36), ladite queue de piston (34) étant guidée par une bague de guidage (38) montée fixe dans le corps de piston, la tête de piston (32) venant au repos en appui contre une bague d'appui (42) par l'intermédiaire de l'épaulement (36), ledit piston (10) délimite une chambre de travail (16) susceptible de contenir un liquide de frein sous pression et en communication avec des freins et une chambre d'alimentation (14) mise en communication au repos avec ladite chambre de travail par un dispositif à clapet 18) disposé dans le corps du piston (10), un canal d'alimentation (24) comportant une première extrémité longitudinale (37) raccordée de manière étanche à un réservoir de liquide de frein et une seconde extrémité longitudinale (39) opposée à la première extrémité (37) en regard de la bague d'appui (42) et permettant l'alimentation en liquide de frein de la chambre d'alimentation (14) par un canal de ré-alimentation (44) et des moyens d'amortissement hydraulique (48) du retour en appui de la tête de piston contre la bague d'appui (42) caractérisé en ce que ces moyens d'amortissement hydraulique (48) comportent un moyen obturateur (51) de manière sensiblement étanche de la seconde extrémité longitudinale du canal d'alimentation (24) et au moins un canal d'échappement (50) à débit réduit du liquide de frein de la chambre d'alimentation (14) vers le canal d'alimentation (24). La présente invention s'applique notamment à l'industrie automobile. La présente invention s'applique notamment à l'industrie du freinage pour véhicule automobile et notamment à l'industrie du freinage pour voiture particulière.
摘要:
Die Erfindung betrifft eine Geberarmatur für eine hydraulische Bremse, vorzugsweise nach einem der vorhergehenden Ansprüche, die einen Ausgleichsraum (170, 270, 370, 470, 570), einen Zylinder (140, 240, 340, 440, 540), in dem ein Kolben (150, 250, 350, 450, 550) verschiebbar angeordnet ist, einen in dem Zylinder (140, 240, 340, 440, 540) angeordneten Druckraum (130, 230, 330, 430, 530), der über zumindest eine Verbindungsöffnung mit dem Ausgleichsraum (170, 270, 370, 470, 570) verbunden ist, eine Dichtung (160, 260, 360, 460, 560) zur Unterbrechung der Verbindung zwischen dem Druckraum (130, 230, 330, 430, 530) und dem Ausgleichsraum (170, 270, 370, 470, 570) und eine Druckpunkteinstelleinrichtung (190, 290, 390, 490, 590) aufweist, wobei die Druckpunkteinstelleinrichtung (190, 290, 390, 490, 590) derart ausgebildet und angeordnet ist, dass die Verbindung zwischen dem Ausgleichsraum (130, 230, 330, 430, 530) und dem Druckraum (130, 230, 330, 430, 530) in der Ruhelage unterbrechbar ist.