reduces, or even obviates, the need for the solid particle suspension. Introduction . Electrorheological fluids as a means of operating clutch mechanisms were. Smart Technology produces and sells Smart Materials like Electro Rheological Fluid and Piezo Actuators worldwide. The paper presents experimental results concerning the wear of heterogeneous electro-rheological (ER) fluids operating as working fluids in a complex clutch.

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Automatic transmission Chain drive Clutch Constant-velocity joint Continuously variable transmission Coupling Differential Direct-shift gearbox Drive shaft Dual-clutch transmission Drive wheel Electrohydraulic manual transmission Electrorheological clutch Epicyclic gearing Fluid coupling Friction drive Gear stick Giubo Hotchkiss drive Limited-slip differential Locking differential Manual transmission Manumatic Parking pawl Park by wire Preselector gearbox Semi-automatic transmission Shift by wire Torque converter Transaxle Transmission control unit Universal joint.

The properties of ER fluids make them ideal materials to transfer energy and control motion electronically, particularly in the automotive industry.

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Fluid durability in a high speed electro-rheological clutch

Electrorheologicl the case of braking, the energy production is maximized. By using this site, you agree to the Terms of Use and Privacy Policy. Abstract The general problem on dynamics of the electrorheological clutch is formulated and studied. Sign In Forgot password? An electrorheological clutch ER clutch comprises drive and driven members, generally parallel to each other, that eleftrorheological be selectively engaged by the application of a voltage to an electrorheological ER fluid.


Don’t have an account? The velocity on the surface of the driven rotor is defined as an integral of the torque function over time t from zero to t.

Latest Most Read Most Cited Diagnostics of wear thermoelastic instability based on sliding contact parameter monitoring. The electromagnetic scattering problem by a cylindrical doubly connected domain at oblique incidence: This page was last edited on 16 Marchat Functions of time of the angular velocity of the driving rotor and of the voltages are considered electrorheologlcal be controls.

This article is also available for rental through DeepDyve. Most users should sign in with their email address. Purchase Subscription prices and ordering Short-term Access To purchase short term access, please sign in to your Oxford Academic account above. As a first step towards commercialisation, the research team is working with China Patent Investment to develop potential applications for the ER fluids. To purchase short term access, please sign in to your Oxford Academic account above.

The clutch acts as a power amplifier and the effect is fast of the order of milliseconds and reversible. At HKUST, researchers have employed nanotechnology to develop a novel type of ionic ER fluid that consists of white powder particles with an average diameter of 50 nanometers electrorheoogical in silicone oil. Receive exclusive offers cluthc updates from Oxford Academic. A small ER-based clutch for use in motorised bicycles is electrorheologiacl to be ready in early Sign in via your Institution Sign in.

Trapped modes of the Helmholtz equation in infinite waveguides with wall indentations and circular obstacles. The electrorhellogical of the electrorheological clutch is simulated by a nonlinear parabolic equation which describes the motion of electrorheological fluid in the gap between the driving and driven rotors.


New ER fluids build better clutches

Citing articles via Web of Science 3. The problem amounts to finding out a function of velocity of the electrorheological fluid which satisfies the motion equation non-linear parabolic equation and mixed non-classical boundary conditions.

Approximate problem is formulated in a form of a problem with a delay. When an external electric field is applied, they can be changed within a few milliseconds a few thousandths of a second into a solid state but revert to liquid instantly when the current goes off. In the case that the clutch acts as ekectrorheological accelerator, the energy consumed in the acceleration of the driven rotor is minimized under the restriction that at some instant, the angular velocity and the acceleration of the driven rotor are localized within given regions.

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Litvinov; Dynamics of electrorheological clutch and a problem for non-linear parabolic equation with non-local boundary conditions, IMA Journal of Applied MathematicsVolume 73, Issue 4, 1 AugustPages —, https: Scientists at the Hong Kong University of Science and Technology have developed a novel clutch based on a new class of electrorheological fluids.

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