Abstract:
Die Erfindung betrifft ein kompaktbauendes Hydraulikaggregat für schlupfgeregelte Bremsanlagen, mit mehreren an einem Aufnahmekörper angeordneten hydraulischen, mechanischen und/oder elektrisch betätigbaren Funktionselementen, wie Speicher-, Ventil(1,1'), Druckerzeuger(5) und Antriebselemente (6), mit mehreren die Funktionselemente miteinander verbindenden Druckmittelkanälen (4,15,16), die eine hydraulisch schaltbare Verbindung zwischen wenigstens einer Druckmittelversorger (14) und einem Druckmittelverbraucher (19) herzustellen vermögen sowie mit einer Steuervorrichtung, die mittels elektrischer Leiter mit den Ventil(1,1') und Antriebselementen (6) verbindbar ist. Für die elektrische Betätigung des Antriebselementes (6) ist im Aufnahmekörper (3) eine Kabeldurchführung (26) vorgesehen.
Abstract:
A compact hydraulic aggregate for drive slip-regulated braking systems has several hydraulic, mechanical and/or electrically actuated functional elements arranged on a reception body, such as accumulator, valve (1, 1'), pressure generator (5) and driving elements (6), several pressure medium ducts (4, 5, 16) for inteconnecting the functional elements, establishing a hydraulically switchable connection between at least one pressure medium supplier (14) and a pressure medium consumer (19), and a control device connectable by electric conductors to the valve (1, 1') and driving elements (6). The valve elements (1, 1') are arranged in several valve reception bores (2, 2') of the valve reception body (3) which receives a first and a second row of valves (x, y). Between both diametrally opposed rows of valves (x, y) are provided several pressure medium bores (4) for inteconnecting the valve elements (1, 1') and bores (7, 8) for receiving the pressure generator (5) and dribing element (6). Additional co-axially arranged reception bores (9, 10, 11) open into the valve reception body (3) outside both rows of valves (x, y).
Abstract:
The combination accumulator and variable volume sump (50) comprises a housing (52) having therein a stepped bore (56). A pair of U-shaped piston (60, 80) are disposed within the stepped bore (56), the first piston comprising an accumulator piston (60) and defining with the housing (52) and stepped bore (56) a first chamber (70) containing therein pressurized medium. The second piston (80) defines with the housing (52) and stepped bore (56) a second chamber (90) containing therein pressurized fluid. Open ends of the U-shaped pistons (60, 80) are received one within another, and a spring (95) is disposed between interior openings (62, 82) of the pistons (60, 80) to bias them apart. The housing (52) has a pair of openings (54, 59) for communicating pressurized fluid, one opening (54) communicating with the second chamber (90) and the other opening (59) communicating with the stepped bore (56) in order to communicate pressurized fluid to the first piston (60). Displacement of the first piston (60) along the stepped bore (56) results in a corresponding increased displacement of the second piston (80) relative to the housing (52).
Abstract:
A liquid spring accumulator includes a housing (60, 62) having inlet (72) and outlet (22) ports connected to a source (10) of liquid under pressure. The housing contains a high pressure chamber (64) and a cylindrical chamber (66) containing a spring-loaded piston (74). A rod (76) attached to the piston (74) is movable therewith into the high pressure chamber (64). A passageway (126) through the axis of the piston (74) and rod (76) provides communication between the inlet port (72) and the high pressure chamber (64) and includes a valve seat (132). A check valve member (130) in the passageway (126) includes a shaft (128) holding the movable member (130) off its seat (132) during initial flow of hydraulic liquid into cylinder (60), permitting flow to fill the high pressure chamber (64). As the liquid pressure increases, the initial movement of the piston (74) permits the check valve (130) to close, and still further increases in pressure cause the piston (74) to force the rod (76) into the high pressure chamber (64), substantially increasing its hydraulic pressure.