Abstract:
The invention relates to a system for improving the energy efficiency in hydraulic systems, comprising an actuator (49) which, in an operating state, operates as a consumer of hydraulic energy and, in a different operating state, as a generator of hydraulic energy, and a hydraulic accumulator (1) which, when in an operating state of the actuator (49), can be charged by the same for storing energy and, when in a different operating state, can be discharged for delivering energy to the actuator (49). According to the invention, at least one hydraulic accumulator in the form of an adjustable hydropneumatic piston accumulator (1) is provided, in which are formed a plurality of pressure chambers (19, 21, 23, 25) which adjoin effective surfaces (11, 13, 15, 17) of different sizes on the fluid side of the accumulator piston (5), and an adjusting arrangement (51) is provided which connects a selected pressure chamber (19, 21, 23, 25) or a plurality of selected pressure chambers (19, 21, 23, 25) of the piston accumulator (1) to the actuator (49) as a function of the pressure level that prevails respectively on the gas side of the piston accumulator (1) and on the actuator (49).
Abstract:
An accumulator (100) for a hydraulic system, wherein the accumulator (100) comprises a liner (110), a piston (140) and a housing (200), that defines a pressure chamber (PC), for receiving hydraulic fluid at high pressure, wherein the piston (140) is biased towards an end position of the pressure chamber (PC) for interacting with the hydraulic fluid in the pressure chamber (PC), and the piston (140) is movable in a predetermined range for accumulating hydraulic fluid. The accumulator has at least one outlet port (111) in a sidewall (112) of the liner (110), which outlet port (111) is covered by the piston (140) in the predetermined range and is uncovered when the piston (140) has moved a predetermined distance from the end position. A hydraulic system is also provided that comprises the above accumulator and an all-wheel drive system comprising the above hydraulic system. A method for de-airing an accumulator according to above is also provided.
Abstract:
Die Erfindung betrifft einen Druckspeicher, insbesondere Pulsationsdämpfer, mit einem Speichergehäuse (10) und einem darin angeordneten Kolbenteil (28), wobei sich ein balgartiges Trennglied (30), mit seinem einen Ende (32) am Kolbenteil (28) abstützt, und mit seinem anderen Ende (34) am Speichergehäuse (10), und wobei das Trennglied (30) zwei Arbeitsräume (26, 40), insbesondere einen Gasraum (26) von einem Fluidraum (40) innerhalb des Speichergehäuses (10) fluiddicht, insbesondere gasdicht, voneinander trennt. Dadurch, dass der eine Arbeitsraum (26) neben einem vorgebbaren Volumenanteil an einem Arbeitsgas mit einem Fluid befüllt ist, erlaubt das Arbeitsgas bis zu einem vorgebbaren Grad eine Komprimierung und dergestalt eine Abdämpfung sowie eine Glättung der auf der Fluidseite des Speichers auftretenden Pulsationen des dahingehenden Fluidmediums.
Abstract:
The invention relates to a hydraulic accumulator, especially a hydraulic damper, comprising a connecting piece (18) for producing a fluidic connection between the interior (16) of said hydraulic accumulator and at least two fluid connecting lines (20, 22) that are part of a fitting (24) when assembled, whereby the connecting piece (18) is connected to the fitting (24). The connecting piece (18) is provided with at least one annular channel (26) in the outer periphery thereof in such a way that, once assembled, the connecting section (28) of the connecting piece (18) leading to the interior (16) of the hydraulic accumulator is in fluidic connection in the fitting (24) with fluid connecting line (22) by means of the annular channel. This makes it possible to obtain a compact construction of the described array and to avoid the disadvantages of long lines.
Abstract:
The invention relates to a pressure means accumulator (31) for vehicle brake systems with automatic brake control. The inventive pressure means accumulator has a housing (32) with two pressure means connections (33, 34) and an accumulator chamber (35) interconnecting them, an elastic membrane (41) delimiting said accumulator chamber (35), said membrane being fixed in the housing (32) on the edges, and an air-permeable support body (42), which is accommodated in the housing (32) and which has a support surface (43) for supporting the membrane (41). According to the invention, a large area of the support surface (43) is drawn deeply into the support body (42) and the membrane (41) is guided along on the support surface (43) in its non-extended state in order to improve the freeing of the accumulator volume and hereby improve the dynamics for the build-up of pressure when the traction control system is in operation or during regulation of driving dynamics. The support surface (43) is preferably shaped by the inner contour of a pot-shaped recess (48) in the support body (42).
Abstract:
축압기는 가동성 분리 요소(30)가 유체 챔버(28)로부터 유체 기밀성으로 유체가 충전된 가스 챔버(16)를 분리하는 축압기 하우징(2)을 포함한다. 축압기는 분리 요소(30)의 밀봉 효과에 악영향을 비치는 경우에 광학 신호를 공급하는 모니터링 디바이스(50, 54)가 제공된다.