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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The ER fluid is used as the coupling between the input and the output drive and driven members. Functions of time of the angular velocity of the driving rotor and of the voltages are considered to be controls. The electromagnetic scattering problem by a cylindrical doubly connected domain at oblique incidence: If you originally registered with a username please electrorheooogical that to sign in.

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The velocity of the fluid is specified on the surface of the driving rotor. Approximate problem is formulated in a form of a problem with a delay. The properties of ER fluids make them ideal materials to transfer energy and control motion electronically, particularly in the automotive industry.

Electrorheological clutch – Wikipedia

The problem amounts to finding out a function of velocity of eletcrorheological electrorheological fluid which satisfies the motion equation non-linear parabolic equation and mixed non-classical cljtch conditions. The clutch acts as a power amplifier and the effect is fast of the order of milliseconds and reversible. In the case that the clutch acts as an 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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Electrorheological clutch

You could not be signed in. 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: A small ER-based clutch for use in motorised bicycles is expected to be ready in early From Wikipedia, the free encyclopedia. In the case of braking, the energy production is maximized.

Latest Most Read Most Cited Diagnostics of wear thermoelastic instability based on sliding contact parameter monitoring. Views Read Edit View history. In this case, the velocity of the driving rotor is prescribed on one part of the boundary.

Email alerts New issue alert. An electrorheological clutch ER clutch comprises drive and driven members, generally parallel to each other, that can be selectively engaged by the application of a clutdh to an electrorheological ER fluid.

Receive exclusive offers and updates from Oxford Academic. As a first step towards commercialisation, the research team is working with China Patent Investment to develop potential applications for the ER fluids.


The fluids are capable of exhibiting a high yield stress the strength of the materials in solid state of kPa when electrically charged, ten times stronger than the previously achievable ER solid strength. Deutsches Urheberrecht mit Print on Demand. Clutches Automotive transmission technologies.

At the flick of a switch, the ER suspension, which has the fluidity of milk, becomes sticky and solidifies into a material as hard as plastic within a few milliseconds.

Ahmad Hosseini-Sianaki – Google Scholar Citations

Sign In Forgot password? The operation 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.

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Regularization of the semilinear sideways heat equation. The general problem on dynamics of the electrorheological clutch is formulated and studied.