Abstract:
Hydraulic braking arrangement (1) for controlling front and rear brakes (2, 3) of an off-road vehicle, comprising a power brake valve (5) fluidly interposed between rear brakes (3) and a first source (4) of fluid in pressure of vehicle and being configured to selectively allow passage of fluid coming from first source (4) to rear brakes (3), the power brake valve (5) being further configured to provide at least a hydraulic signal (8a, 8b) configured to control a relay valve (10) fluidly interposed between front brakes (2) and a second source (12) of fluid in pressure of the vehicle and being configured to selectively allow passage of fluid coming from second source (12) to front brakes (2) in function of the at least one hydraulic signal (8a, 8b).
Abstract:
The invention relates to a primary piston assembly (22, 28) for a master brake cylinder (12) of a vehicle braking system with a first primary piston component (22) having a first piston element (24), to which a driver's braking force (Fb) is transferrable in such manner that a pressure chamber volume of a pressure chamber (10) of a master brake cylinder (12) of the braking system that is fillable with a liquid can be reduced by displacement of the first piston element (24) via the driver's braking force (Fb), wherein the pressure chamber volume that is fillable with a liquid can be further reduced by means of a first braking support force (Fu1) provided by a braking force amplifier actuator device (26), and wherein the primary piston assembly (22, 28) comprises a second primary piston component (28) with a second piston element (30), to which the first braking support force (Fu1) is transferrable in such manner that the pressure chamber volume of the pressure chamber (10) can be reduced by displacement of the second piston element (30) by means of the first braking support force (Fu1). The invention further relates to a production method for a braking unit with at least one master brake cylinder (12) and one braking force amplifier device (48), and a method for operating a braking unit.
Abstract:
Die Erfindung betrifft ein Bremssystem mit einem Bremskraftverstärker, bei dem mittels mindestens einem schaltbaren Ventil (7, 15) Druckmittel aus mindestens einer Radbremse (10) in eine Speicherkammer (8) leitbar ist, wobei eine Steuerungseinrichtung zumindest das mindestens eine schaltbare Ventil (7, 15) steuert, wobei im Störungsfalle des Bremskraftverstärkers (1), insbesondere wenn dessen Antrieb (11) oder das zwischen Antrieb (11) und Kolben des Hauptbremszylinders (4) zwischengeschaltete Getriebe blockiert ist, die mindestens eine Speicherkammer (8) zur Aufnahme von Druckmittel aus mindestens einer Radbremse oder mindestens einem Bremskreis und somit zum Druckabbau in mindestens einer Radbremse dient.
Abstract:
L' invention concerne un système de commande de freins pour véhicule automobile comportant une pédale de frein (1), un servomoteur d'assistance au freinage (4) , un maître cylindre de frein (5) . Le système de l'invention comporte en outre un simulateur (3) couplé pneumatiquement au piston (42) du servomoteur d'assistance au freinage (4) . Ce simulateur (3) reçoit au moins une commande de freinage de la pédale de frein (1) et permet d'établir, en échange, une différence de pressions entre la chambre avant (40) et la chambre arrière (41) du servomoteur d'assistance au freinage de façon à commander le déplacement du piston (42) .
Abstract:
A vehicle hydraulic braking system comprising: a service braking system (A) powered by a hydraulic generator (3); an emergency braking system (B); a manual control element (D, 16); a master cylinder (17); at least one safety valve (26, 28); a simulator (M) used, as the manual control element moves forward (D, 16), to oppose a reaction that reflects the braking process, said simulator comprising a cylinder (30) wherein a simulator piston (31) slides and which is subject, in one direction, to a liquid pressure from the master cylinder (17) and, in the opposite direction, to an opposing force dependent on the stroke of the manual control element; inlet (9a-9d) and outlet (14a-14d) solenoid valves connected to the wheel brakes (2a-2d); sensors (8, 13a-13d, 24, 29) used to capture different braking parameters; and a computer (C) used to control the solenoid valves. The counteracting force in the simulator (M) results from the action, on one surface of the simulator piston (31), from a modulated pressure established on the basis of the liquid pressure supplied by the hydraulic generator (3) and controlled by the computer (C) according to a given law, which can be modified at will.
Abstract:
A spring applied, hydraulically released (SAHR) parking and emergency brake system (30) can be manually overridden to permit towing or assisted vehicle transport when charge pump pressure is unavailable for the brakes (40), and is reset either automatically when charge pump pressure becomes available or manually. Override is made possible by a manual override assembly (50) that includes a manually-actuated hand pump (86) and an override valve (84). The override valve (84) is manually actuated to isolate the brake release actuators (44) and the outlet of the hand pump (86) from the system's reservoir (64) and is reset to its open position in response to the presence of hydraulic pressure at a designated location of the braking system. Automatic reset of the override valve (84) preferably is effected by the supply of pressurized fluid to a previously-unpressurized port of the override valve (84). The hand pump (86), override valve (84), and any other brake control valve(s) of the braking system (30) preferably are incorporated into a single control module (52).
Abstract:
An automatic braking system and method are provided for controlling the automatic operation of a pneumatic (air) brake system installed on commercial highway vehicles and the like, particular heavy trucks and buses. When a possible collision is detected or an object is detected in proximity to at least one side and/or end of the vehicle, the system automatically operates the existing, factory installed air braking system of the vehicle to avoid a collision or mitigate the collision impact by concurrently pressurizing each of the rear and front pneumatic service brakes of the vehicle. Pressing the existing vehicle brake pedal deactivates the automatic braking system, thereby permitting the driver to take over control of braking at any time.
Abstract:
A hydraulic device is provided with a sleeve insert disposed between a driven hub and a stationary housing. The hydraulic device further includes a hydraulic motor to actuate the driven hub through a drive shaft and a coupling mechanism. A sealing element is disposed between the sleeve insert and the stationary housing. The sleeve insert is fixed to the driven hub and disposed between the stationary housing and the driven hub to provide a riding surface on which the sealing element slides as the driven hub rotates relative to the stationary housing.
Abstract:
Die Erfindung betrifft ein Verfahren zum Betreiben eines bremskraftverstärkten hydraulischen Bremssystems eines Fahrzeugs mit den Schritten: Ermitteln einer Information bezüglich einer Zu- oder Abnahme mindestens einer zusätzlich zu einer hydraulischen Bremskraft des Bremssystems auf mindestens ein Rad (60) ausgeübten Zusatz-Bremskraft, welche größer als eine vorgegebene Mindestdifferenz ist, Ändern einer Unterstützungskraft, welche von einem zusammen mit einem Bremseingabeelement (56) an ein Kraft-Einkoppelelement gekoppelten Bremskraftverstärker (58) bereitgestellt wird, um eine Kraftdifferenz unter Berücksichtigung der Information so, dass die hydraulische Bremskraft korrespondierend zu der Zu- oder Abnahme der Zusatz-Bremskraft geändert wird, und Verschieben eines Volumens eines Bremsmediums des Bremssystems zwischen mindestens einer Speicherkammer mindestens eines Plungers (88a, 88a', 88b, 90) und/oder mindestens eines Zwei-Kammern-Zylinders und einem speicherexternen Volumen des Bremssystems unter Berücksichtigung der ermittelten Information so, dass eine Ausgleichkraft korrespondierend zu der Kraftdifferenz auf das Bremseingabeelement (56) ausgeübt wird. Ebenso betrifft die Erfindung eine Steuervorrichtung (25) für ein bremskraftverstärktes hydraulisches Bremssystem eines Fahrzeugs.
Abstract:
본 발명은 안전하고 개선된 제동성이 유지될 수 있는 차량용 제동 장치에 관한 것이다. 본 발명의 실시예에 따른 차량용 제동 장치는 가압력을 발생시키는 제동 페달; 상기 제동 페달로부터 유입되는 가압력이 배가되도록 하되, 배가된 압력이 분기되어 전달되도록 하는 배력장치; 상기 배력장치로부터 입력되는 상기 배가되어 분기된 압력을 각각 이용하여 제동 유압이 발생되도록 상호 병렬로 구획되어 구비된 복수개의 마스터 실린더; 및 상기 각 마스터 실린더에 연결되어 대응되는 바퀴의 제동 유닛으로 유압을 안내하는 회로부를 포함하여 이루어지는 차량용 제동장치를 포함하여 이루어진다.