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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From Electroheological, the free encyclopedia. Latest Most Read Most Cited Diagnostics of wear thermoelastic instability based on sliding contact parameter monitoring. In this case, the velocity of the driving rotor is prescribed on one part of the boundary.

You do not currently have access to this article. Don’t have an account? Clutches Automotive transmission technologies. By using this site, you agree to the Terms of Use and Privacy Policy. If you originally registered with a username please use that to sign in.

Researchers have used the fluids to create a new type of clutch. Don’t already have clutxh Oxford Academic account?

Deutsches Urheberrecht mit Print on Demand. The general problem on dynamics of the electrorheological clutch is formulated and studied. This article is also available for rental through Electrorhellogical. Citing articles via Web of Science 3. Receive exclusive offers and updates from Oxford Academic. 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 dispersed in silicone oil.

Approximate problem is formulated in a form of a problem with a delay. Email alerts Elecctrorheological issue alert. Optimal control eldctrorheological electrorheological clutch described by nonlinear parabolic equation with nonlocal boundary conditions. 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.


New ER fluids build better clutches | The Engineer The Engineer

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. Sign in via your Institution Sign in.

Retrieved from ” https: The existence of a solution of optimal control 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.

Trapped modes of the Helmholtz equation in infinite waveguides with wall indentations and circular obstacles. Regularization of the semilinear sideways heat equation. You could not be signed in. 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 voltage to an electrorheological ER fluid. The ER fluid is used as the coupling between the input and the output drive and driven members.

A small ER-based clutch for use in motorised bicycles is expected to be ready in early The properties of ER fluids make them ideal materials to transfer energy and control motion electronically, particularly in the automotive industry. The existence of a solution of optimal control problem is proved and necessary optimality conditions are established. Abstract The general problem on dynamics of the electrorheological clutch is formulated and studied.

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.


Scientists at the Hong Kong University of Science and Technology have developed a novel clutch based on a new class of electrorheological fluids. The clutch acts as a power amplifier and the effect is fast of the order of milliseconds and reversible.

The velocity of the fluid is specified on the surface of the driving rotor. In the case of braking, the energy production is maximized. The electromagnetic scattering problem by a cylindrical doubly connected domain at oblique incidence: The torque function is computed upon integrating the shear stresses non-linear functions of derivatives of the velocity over the surface of the driven rotor.

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Nonlocal nonlinear boundary condition is given on a part of the boundary, which corresponds to the driven rotor. Litvinov; Dynamics of electrorheological clutch and a problem for non-linear parabolic equation with non-local boundary conditions, IMA Electrrorheological of Applied MathematicsVolume 73, Issue 4, 1 AugustPages —, https: Views Read Edit View history.

The operation of the electrorheological clutch is simulated by clufch nonlinear parabolic equation which describes elecrtorheological motion of electrorheological fluid in the gap between the driving and driven rotors.

Electric motor Hybrid vehicle drivetrain Electric generator Alternator. Part of the Automobile series. Most users should sign in with their email address. This page was last edited on 16 Marchat Sign In Forgot password? This process, called electrorheology, is reversible.

Functions of time of the angular velocity of the driving rotor and of the voltages are considered to be controls.