Abstract:
The invention relates to a brake system for a vehicle, comprising a master brake cylinder (10). The master brake cylinder has a first chamber (12), a rod piston (14), which bounds the first chamber (12) by means of at least one first hydraulically active surface (14a), a second chamber (16), and a floating piston (18). The rod piston (14) is formed with or can be coupled to a second hydraulically active surface (14b). The second hydraulically active surface (14b) bounds an additional chamber (20) of the master brake cylinder (30) or of a further brake cylinder (144). The additional chamber (10) is connected to a storage chamber (36) and/or is connected to the hydraulic reservoir (24) by means of a first non-return valve (100) and a throttle (102), which are arranged in a further fluid line (104).
Abstract:
Die Erfindung betrifft ein Bremsgerät und ein Bremssystem jeweils mit einem Hauptbremszylinder (10) mit mindestens einer ersten Druckkammer (12), welche zumindest in ein erstes Teilvolumen (12a) und in ein zweites Teilvolumen (12b) unterteilt oder unterteilbar ist, welche hydraulisch an ein Bremsflüssigkeitsreservoir (24) anbindbar oder angebunden sind, wobei ein erster Bremskreis (28) an das erste Teilvolumen (12a) hydraulisch anbindbar oder angebunden ist, und mit einer Ventileinrichtung (38), welche mechanisch derart ausgelegt ist, dass in dem zweiten Teilvolumen (12b) ein Druckaufbau bis zu einem mechanisch vorgegebenen Grenzdruck bewirkbar ist, wobei Bremsflüssigkeit über zumindest eine Teilkomponente (38a) der Ventileinrichtung (38) zumindest in den ersten Bremskreis (28) transferierbar ist, und ein Übersteigen des Grenzdrucks in dem zweiten Teilvolumen (12b) unterbunden ist.
Abstract:
A master cylinder apparatus includes: an input piston that can be moved forward by operating a brake operating member; a pressure piston that is provided in front of the input piston to be capable of moving relative to the input piston;, and a stroke velocity ratio modification device that is capable of modifying a stroke velocity ratio, which is a ratio between a stroke velocity of the pressure piston and a stroke velocity of the input piston, in at least two stages while the input piston moves from a rear end portion position to a front end portion position, and that sets the stroke velocity ratio at 1 when an abnormality occurs - in the master cylinder apparatus.
Abstract:
Elektrisch steuerbare Druckbereitstellungseinrichtung (5, 5') für eine hydraulische Kraftfahrzeug-Bremsanlage, mit einer in einem Gehäuse (53, 21) angeordneten Stufenbohrung (54) und einem Kolben (51), der durch einen elektromechanischen Aktuator (35, 36) betätigbar ist, wobei der Kolben (51) mit dem Gehäuse (53, 21) einen Druckraum (50) begrenzt, wobei der Kolben (51) als Stufenkolben ausgeführt ist, dessen Kolbenstufe kleineren Durchmessers (51') nach einer vorgegebenen Betätigung des Stufenkolbens in die Stufe kleineren Durchmessers (54') der Stufenbohrung eintaucht, so dass der Druckraum (50) in eine erste Druckkammer (55) und eine zweite Druckkammer (56) unterteilt wird, sowie Bremsanlage für Kraftfahrzeuge mit einer solchen Druckbereitstellungseinrichtung.
Abstract:
A master cylinder (10) suitable for use in a vehicle braking system has an unusual capability to supply quantities of fluid and fluid pressures at its output in differentiated manner in dependence on the braking stage, preventing long transitory stages in the transition between an approach stage and an actual braking stage. The cylinder (10) comprises a cylinder body (12) inside which a first chamber (A) and a second chamber (B) are provided. The first chamber (A) is in operative communication with at least one braking member and houses a first piston (48). The second chamber (B), which has larger transverse dimensions than the first chamber (A), is in operative communication with the first chamber (A), and houses a second piston (50). Ducts (60, 61) are provided and put the first chamber (A) and the second chamber (B) into communication during the approach stage. The ducts (60, 61) house a low-pressure valve (84) which is open during the approach stage and closed during the actual braking stage.
Abstract:
The invention concerns a pressure amplifying device for hydraulic circuit comprising means (1) (2) (3) for filling the circuit up to a predetermined pressure with a large flow rate, and beyond said pressure, for amplifying said pressure with a small flow rate. The invention is characterized in that: the means consists of a body or housing (1) for delimiting two coaxial inner recesses (1a) and (1b) of different cross-section (S1) (S2) communicating with the hydraulic circuit, to be subjected to an input pressure (P1) and an output pressure (P2); said recesses receiving with sealed sliding capacity a flanged piston delimiting two bearing surfaces (3a) and (3b) with same cross-section as that of the recesses. The piston (3) is designed to allow the free passage of the hydraulic fluid into one of the recesses communicating with the output, or for displacing it in accordance with the value of the input (P1) and output (P2) pressures in combination with an adjustable resistant force exerted on the piston, by sending compressed air into the other recess communicating with the input.
Abstract:
An automotive braking system (10) comprises wheel brakes (12), a master cylinder assembly (18) and a pedal assembly (16) to actuate the master cylinder. The master cylinder comprises fast-fill and high pressure cylinder portions. The pedal assembly is adapted to change progressively the mechanical advantage or velocity ratio of the assembly throughout pedal travel so that in the first part of the movement its mechanical advantage is greater than in the second part of the movement. This is the opposite of what would be expected in a system which is not servo-assisted since the greatest force would be expected to be required in the second part of the movement when braking is occurring.
Abstract:
A master cylinder arrangement (10) for a hydraulic vehicle brake system has a housing (14) and a bore (16) located therein, said bore being configured along an axis (A). At least one filling chamber (18) and a first pressure chamber (22) are delimited in the bore. A filling piston (38) and a first pressure piston (40) connected thereto displace fluid from the filling chamber (18) to the admission side of a hydraulic pump (60), whose pressure side feeds pumped fluid into a first brake circuit (64); and from the first pressure chamber (22) into the first brake circuit (64). The filling piston (38) and the first pressure piston (40) can be moved in relation to each other along axis (A), about a limited mass (s), in order to produce the desired, so-called "snap-in effect". The filling piston (38) and the first pressure piston (40) are also elastically pre-stressed in relation to each other in such a way that they are forced apart. Once both pistons (38, 40) have been moved in relation to each other about the mass (s), against the elastic force forcing them apart, the filling piston (38) rigidly couples with the first pressure piston (40).
Abstract:
Pressure converter for hydraulic brakes, particularly for brakes of a tractor. The converter comprises a body (10), a piston device (15) reciprocating in the borings of the body, a primary compartment (24), and a secondary compartment (27). The area of the cross-section of the piston in the primary compartment (24) is essentially larger than the area of the cross-section of the piston in the secondary compartment (27). The primary pressure (p1) is conducted to the primary compartment from the brake system master cylinder, and the amplified secondary pressure is conducted from the secondary compartment to the wheel cylinders. In order to avoid a too high secondary pressure for instance in steering brake operation, and in order to make it possible to use a high conversion ratio, the pressure converter is equipped with a pressure-limiting organ (25, 26, 27), by means of which the secondary pressure is limited according to the highest maximum allowed secondary pressure. The conversion ratio (A u/A u) of the pressure converter is also selected high enough to essentially provide the maximum allowed secondary pressure with primary pressures available in normal brakings.
Abstract translation:用于液压制动器的压力转换器,特别是拖拉机的制动器。 转换器包括主体(10),在主体的钻孔中往复运动的活塞装置(15),主隔室(24)和次级隔室(27)。 主隔室(24)中的活塞的横截面的面积基本上大于次级隔间(27)中的活塞的横截面的面积。 初级压力(p1)从制动系统主缸传导到主室,并且放大的二次压力从次级室传导到轮缸。 为了避免例如在转向制动操作中的过高的二次压力,为了能够使用高转换比,压力转换器配备有限压器官(25,26,27),通过 根据最高允许的最大二次压力限制二次压力的装置。 压力转换器的转换比(A u / A u)也被选择得足够高以基本上提供允许的最大二次压力与正常制动中可用的初级压力。
Abstract:
A braking device (1) of a trailer comprising a body (2) internally hollow in which are defined at least a delivery gap (3a) of a working fluid, at least a discharge gap (3b) and at least a braking gap (3c), at least a distributor element (4) housed sliding inside the body (2), operating means (5) housed inside the body (2) and suitable for exerting a force on the distributor element (4) to cause the movement thereof, the distributor element (4) having at least a connection element (6) to the operating means (5) and at least a reaction surface (SR) communicating with the braking gap (3 c), on which the working fluid acts to exert a further force on the distributor element itself; the breaking device (1) further comprising sealing means (7, 8) housed in the body (2) and arranged around the connection element (6) so as to hydraulically separate the distributor element (4) from the operating means (5).