摘要:
Disclosed herein is an energy-absorbing device comprising a first layer; a second layer; the second layer being opposedly disposed to the first layer and in slideable communication with the first layer; the first layer and the second layer enclosing a space therebetween; the space being filled with a fluid that has a power law exponent a of at least about 1.3 when measured in half cell split Hopkinson bar using Equation (3) below; where | Ƭ w | max is a maximum shear stress, γ is a shear strain rate, U is a characteristic velocity of the striker wall, h is a thickness of the space, n is a power law dimensional factor that represents an energy dissipating property of the fluid.
摘要:
Eine Federungseinrichtung (10) für ein Kraftfahrzeug umfasst einen Federzylinder (12) zur Schwingungslagerung einer gegenüber einem Karosserieteil (14) des Kraftfahrzeugs beweglich angeordneten Fahrzeugkomponente (16), insbesondere einer Fahrerkabine oder eines Fahrersitzes. Erfindungsgemäß ist der Federzylinder (12) mit einem Trennspeicher (44) zur mittelbaren Druckbeaufschlagung eines in dem Trennspeicher (44) befindlichen Dämpfungsfluids veränderlicher Rheologie verbunden, wobei das in dem Trennspeicher (44) befindliche Dämpfungsfluid veränderlicher Rheologie über ein Drosselelement (58) auf einen mit dem Trennspeicher (44) in Verbindung stehenden Hydrospeicher (60) derart einwirkt, dass mittels einer Einrichtung zur Rheologieänderung (70) die Dämpfungscharakteristik des Federzylinders (12) adaptierbar ist.
摘要:
A machine (100) employing controllable mounts (106) and a method for controlling such mounts (106) based on machine location are disclosed. The controllable mount (106) may include a housing (108), a pin (120), rheological fluid (116) within the housing (108) and coils (131) provided proximate to the rheological fluid (116). As current is applied to the coils (131), the apparent viscosity of the rheological fluid (116) is increased, and in so doing so is the stiffness of the controllable mount (106). Depending on machine location, however, the operator may want differing levels of stiffness in one or more of the controllable mounts (106). For example, when roading on rocky terrain, the operator may want relatively loose mounts (106) so as to absorb the large vibration inputs and make for a more comfortable ride. The present disclosure therefore identifies the machine location through global positioning satellite information, topography maps, inclinometers, altimeters, operator input, and the like and controls the current to the coils, and thus the relative stiffness and damping of the controllable mounts, accordingly.
摘要:
A machine (100) employing controllable mounts (106) and a method for controlling such mounts (106) based on machine operation are disclosed. The controllable mount (106) may include a housing (108), a pin (120), rheological fluid (116) within the housing (108) and coils (131) provided proximate to the rheological fluid (116). As current is applied to the coils (131), the apparent viscosity of the rheological fluid (116) is increased, and in so doing so are the damping and stiffness properties of the controllable mount (106). With certain machine operations such as fine grading, plowing and loading, this may be helpful to the operator to more quickly or effectively perform the given task. With other operations such as roading or working on a flat surface, the feedback afforded by the mounts (106) is not as important as operator comfort, in which case the current applied to the coils (131) can be lowered and thus the mount (106) can be made more relaxed. The machine (100) of the present disclosure identifies the machine operation being performed through sensors (270), predictive algorithms (266), implement (268) position, and operator input (188) and sets the current and properties of the controllable mounts (106) accordingly.