Parabolic Obstructor Funnel Throttle Valve

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A parabolic obstructor in funnel throttle valve for use in internal combustion engines for regulating the inflow of air or fuel-air mixture into the engine or individual combustion chambers inside the engine.

The basic operating principle is the same as with the butterfly type throttle valve: employing a movable component within a housing – the valve body or housing – which serves as an obstruction of varying severity to the flow of air or fuel-air mixture through the valve housing and whose degree of obstruction to flow may be controlled by means of adjusting its position relative to the valve body through a limited range of motion.

However, instead of employing a circular plate as variable obstruction, whose degree of obstruction to flow is altered by rotating it around a central axis, a parabolic profile cone is used instead.

And the degree of obstruction is instead varied by advancing or retracting the parabolic conical obstructor from the funnel which constitutes the valve's outlet.

A mainly parabolic profile of the shape of the conical plugging element means that its cross-sectional area varies linearly along its length, allowing for a smooth, predictable increase and decrease of the degree of obstruction it poses to the flow of gas through the valve as it is inserted or withdrawn from the valve's funnel neck section.

A conical tip tangential to the main, parabolic profile of the plug enables a linear transition of the rate of increase of its cross-sectional area from 0 to the fixed rate that is constant over the parabolic, main section of its profile.

The valve's main chamber and central housing is of a toroidal shape open on the inside (missing the lower, inside quarter of its tubular cross-section, as it were) which extends below into the valve's funnel shaped outlet and above into a downward recess which ends in a cylindrical collar that extends back upwards around the circular orifice which enables the plugging element to slide into and outside of the valve body.

The inlet to the valve is tangential to the valve's toroidal section, offset laterally from the center of the body of the valve where the outlet funnel extends downwards from and 90 degrees deviated from being parallel to the valve's outlet.

The toroidal section of the valve surrounds the plug and seamlessly connects to the funnel shaped outlet on the side opposite of the valve to where the plug protrudes into the valve through.

The means of actuation of the plugging element constitutes an implementation detail unrelated to the valve's essential design. Actuation can be hydraulic or by means of a solenoid or stepper motor which rotates a screw in one direction or the other to insert or extract the plugging element from the funnel of the valve body.

The expected advantages of this design over a regular butterfly intake valve are less disturbance induced to the flow of gas, air-fuel mixture or other fluids across the valve and lower pumping losses. Two subtypes are proposed.


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  • Name:
    Laurentiu Victor Visan
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  • Laurentiu Victor is inspired by:
    Wanting to do what is in my power to try and make the world a better place by contributing to technological development and improvement in whichever area and by whichever amount I am capable of.
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    Autodesk 123D Design, MOI 3D, Light Tracer for Desktop
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