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I've invented some redesign of a wheel (I know, sounds funny) that solves some issues and is possible only in electric cars.

Hi,
We are new to this forum so let me introduce us briefly.
We are enthusiasts of inventions and making stunning artworks. Every medium possible, binding together different areas of activity -IT with art, math with art, 3D design with music.
Permutations can go further, however some are dead ends (i.e. law with music), making unusual use of accessible resources and knowledge.
We are graphic designers,interior and furniture designers,good artists (in own perception),
innovative .......

Why we are here?
Mark has invented some redesign of a wheel (I know, sounds funny) that solves some issues and is possible only in electric cars. Maybe it will be interesting for Tesla company,we hope so but we would like to hear also your opinion about it.
Here is the project:
[IMG]http://i40.tinypic.com/2dhsm0l.jpg[/IMG]

The concept is simple.
As energy consumption and overall friction rises with the rolling friction, wheels are usually a compromise between energy efficiency and traction efficiency.
As electric cars are now reality there is possibility to apply more sophisticated wheel designs with engine compartment build inside a rim.
In my design there is conical wheel with engine inside a rim, mounted to the pylon providing suspension together with shock absorbency system. This pylon can be spinned on the axis shown on the picture by a certain angle.
Spinning affects several aspects: positions the conical wheel providing larger or smaller contact area with road surface; extends a base of the vehicle; lowers or rises a mass center.
Different pressure areas act in two ways. First, they enable proper deformation of the wheel while it changes its vertical position. Second, lower pressure gives larger contact area with road surface.
There are many advantages of this system (as well as some disadvantages, but why should I sabotage my own idea:) ). Advantages are as follows:
- compact design;
- adjustable traction efficiency (for off-road for instance);
- in case of rain or emergency spinning pylons outside makes vehicle more stable (extended base), lowers mass center and substantially enhances traction;
- in normal road conditions retracted pylons reduces rolling friction;
- with use of friction sensor every wheel can be adjusted separately, for instance on curves (one side adjustment);
Also, changing the punctured wheel itself doesn't have to be major problem as fastening bolts can be placed on the outer edge of the rim. Additionally, three pressure compartments make it highly improbable to flat the tyre completely.

Mark and Barbara Messer

As I cannot attach any image here maybe a link to Google Drive will pass
https://docs.google.com/file/d/0B0n3Al39avb4U2hmV3lZMUM4Y1k/edit?usp=sha...

Funny invention. Not stupid, just funny.

I think this is more in place for off-road cars like some military vehicles with many large wheels. Problem for ordinary street vehicles is that your invention uses a lot more space than traditional design, and also hub-motors are too weak to compete with normal motors. Unsprung weight is also an issue.

Use HTML for pictures. Volkerize.com allows you to search.

And "spinned" is not a word. Try "spun".

What a relief :) .

With space and low power of hub motors it all depends on final design and chosen solutions.
As I live in Europe we have a lot smaller cars here. And they tend to have poor traction in bad weather and critical situations. I had an accident with dog passing two lanes medium speed road. I was driving a little over 100km/h and was extremely lucky not hitting trees on the side of this road. Car was equipped with all 3 letters abbreviations :) with ABS at the first place.
For such a compact class car, hub motors could be enough. Also space issue could be resolved as by placing motors in hubs you save space in the trunk.
As to unsprung weight - this can be solved in different ways. I like those less conservative - what about first stage of springing placed inside the hub? Based on closely placed solid magnets and elastomers as shock absorbers. At the same time those magnets could act as engine's stator enhancement.
This above was less conservative, but there are numerous solutions to reduce unsprung weight. On the drawing I just wanted to show the idea without messing with springs, pneumatics and linkages.

#Brian H

Thanks for advice with html embedding.
As to "spun" - my error, English isn't my mother tongue.

You can't really reduce unsprung weight without reducing unsprung weight. Any added mass to wheel reduces handling.

Vehicle small size usually makes car handle better, not worse. Mass is enemy of performance (inertial forces). Problem with these econoboxes is that they are not made for high speeds (over 100km/h constitute as high speed in this case) and have high CoG. They trip over just like large SUV:s.

You can't really reduce unsprung weight without reducing unsprung weight. Any added mass to wheel reduces handling.
It's obvious. It depends however, where is the first point of suspension. If inside the rim, as proposed above, the unsprung weight can be greatly reduced.
If "higher" - the problem becomes important, I agree, and needs finding a workaround (reducing mass of engine, rim, rubber parts, mountings).
Small car size acts two ways. In good conditions such vehicle is easier to handle, due to ratio traction/mass. In bad conditions greater mass can be beneficial providing better traction.
I'm trying to find variable traction system above.
Such solution lowers also CoG while engaged. Combined with batteries placed low this can greatly reduce risk of vehicle tipping over.

MesserArt, I am no expert, so I have no idea if this is any good. If you believe in it, why don't you get a patent. You want to profit from your ideas down the road.

The people you should show it to are the Tesla engineers. I am sure if you do some research, you can find their email address somewhere.

ps. There are so many good ideas circulating here. Maybe, there should be a separate section for them, so the Tesla people could take a look at them....

Just an idea. Try to tweet the picture to Elon.

https://twitter.com/elonmusk

This way, you will have a proof that you own the idea in case he checks it out and likes it.

Thanks a lot EvaP for your advice, we've already send the email to Elon but not directly to him because we dont have his private adress.
Yesterday I asked the admin of this forum if there is a separate board for new inventions, no answer yet.
I will try to tweet the picture to Elon now.
B.M Messer

One major problem is the wheels will not roll straight.

Take any cone, turn it on its side and roll it. The cone will not roll in a straight line, it will simply spin in a circle. The reason for this is that the larger, base portion of the cone will cause more surface area to pass by the ground per revolution than the smaller, tip portion of the cone. Thus, your wheels would constantly be trying to torque the suspension inward (toe-in). Even if you made the suspension strong enough to resist this torsion, it would be a huge waste of energy, and it would wear out the tire's tread extremely fast.

@Haeze +1. Obvious. I feel stupid that I didn't think of that.

Thank you for your opinions, I will answer in coming days.
Mark Messer


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