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Submit interesting technologies that Tesla should use.

I did not find any similar topics here so i thought it would fit nicely here:

New technologies are found every day all over the world and i am sure not all technologies find their way to Tesla. So therefore this topic.

Here are 2 interesting ones i found today:

http://www.wimp.com/supersupercapacitor/

and:

http://www.wimp.com/tiredesign/

I hope you will share your technological findings here to for Tesla to investigate if they can use it in our future cars. To make our dreams come treu

It can't recover much, otherwise it would not be able to move. Energy lost to suspension is just small fraction of rolling resistance.

Energy saving smart cruise control : Besides tracking the car in front, use predictive algorithms to minimize regen braking, and avoid disk braking. Swithc automatically from regen to coasting mode and back ... Useful in hilly terrain as coasting is more efficient than regen.

In highway driving can the car drive lower? Can the front ned be more aerodynamic? Rliminate some of the grills?

The wheel space undeneath could be made more aerodynamic. Add plastic panels near wheel wells. Eliminate turbulence.

Those improvements should be cheap. Add highway miles!

Coasting downhill gets you tickets. Can be more efficient, but not practical.

It already does, not really and can't do that.

Easy way to extend range: make smaller car. Model S is heavy and large. Not a good combination for efficient driving. For efficiency you can't do much better than they have already done for real world car like Model S.

I hope they at some point invent clear coating for windows that changes infrared to visible spectrum. That could make nighttime driving quite a bit safer. Being able to see wildlife, cyclists and pedestrians way before your lights illuminate it could save lives.

I really like the ways you guys think! There are some great ideas here like the magnetic suspension!

A Self cleaning car would disrupt .

Good site . . . right topic for me . . . lets see how it goes?

I have been pondering how to get at least some juice back to the battery while the car is in FORWARD MOTION (i.e. 90% of the time) instead of while only during regenerative braking (i.e.approx. 10% of the time).

I'm Not Suggesting a Perpetual Motion Time Travel Machine Here . . . ok?

Just a way to capture enough energy from the Forward Motion of the motor driven wheels to send back a useful charge to the battery to slow down the constant depletion rate of the battery.

My current 2013 Elantra LTD has a 4 cyl. 1.8 148HP. The single alternator on my engine probably is costing me 2-3 HP at most.
With high quality bearings at each end who's to say how much drag could be saved and turned into HP ?

You could harness . . . belt drive / chain drive or even perhaps magnetically drive . . . 2 or even probably 3 alternators to each motor/wheel assembly and not suffer any noticeable loss in power. So two motors or four motors / two or three optimized alternators each . . . sounds promising to me?

I can remember holding a few alternators in my hands over the years and spinning the pulley by hand . . . not much to it.

Alternators have been around for many years and can be optimized in many ways if necessary. Nothing needs to be invented to take advantage of these and with todays onboard puter tech. they could be self-diagnosing . . . e.g. Wheel#1 / Unit#2 / #3 Diode Failure.

The equiv. HP of todays elec. motors is much greater than that . . . especially when multiple motors are used.
I suspect the elec. motor design that Tesla uses are made mostly for the long haul (perhaps 500K mi. or more lifetime) although the Model S is known to be as quick as a new Corvette.

If you want to see electric motors/cars made to high performance racing standards watch these . . . ENJOY.

Just Brutally powerful . . . 0 - 100mph in 5 seconds and now 219mph top speed (was 210mph). This Drayson car ( 2 vids below ) is suppose to be in the 24hrs of LeMans this June in France.

http://green.autoblog.com/2013/11/09/chris-harris-drives-drayson-loses-m...

http://green.autoblog.com/2014/03/21/fully-charged-drayson-b12-electric-...

This one is awesome too and really has that powerful sound . . .

http://green.autoblog.com/2014/03/25/all-electric-formula-e-spark-renaul...

For Tesla to consider . . .

I wonder if there is any benefit to somehow adopt the use of this simple engine . . . not in place of their electric motors but to power an electrical charging system for the battery . . . both on-board and at home in the garage?

It is said to generate enough power to drive generators on boats?
Considering it runs off of any heat source that's pretty good?

http://en.wikipedia.org/wiki/Stirling_engine

Alternator is not free energy. A car motor is basically a huge alternator, when you regen it slows car down. It's the act of turning kinetic energy to electricity that is making that braking.

Same thing would happen with smaller alternators, just in smaller scale. You basically drive with brakes on. And since you can never get perfect conversion ratio you just end up losing energy.

What you basically suggest is this:

battery -> motor accelerating the car -> alternator braking the car -> battery.

That's far less efficient than

battery -> motor accelerating a bit less.

Timo my intent is to say . . .

A) Battery > motor accelerating the car & driving the alternator(s)
>some kind of charge being sent back to battery.

B) Regen can still be used separately if it is worth it in terms of energy captured / cost effective and not in the way of A)above.

* I mean to suggest that the alternators be used predominately in the forward motion of the car although my understanding is that alternators work in either direction.

Thanks for helping me to be more clear.

Oh and clearly I do not have a firm understanding of the regen system or it's limitations?

How much charge it sends back to the battery is probably proprietary info. and obviously not enough or the batt would not be in a state of constant depletion.

McGov your idea is perpetual motion unfortunately. If the wheels have to also spin your alternator, and it generates a tiny bit of electricity, then it'll slow the car down a tiny bit more than normal, so you'll need to use a tiny bit of extra power to get the normal performance. It cancels out.

Regen breaking is as timo said , same as ebay you're saying on a bigger scale.

There is debate about how much generating the wheels should do when your foot is off the accelerator. Tesla has a solution that is really liked by many people. (Many (most?) cars don't regen at all until you press the brake - which has another side effect of having the brake pedal activating 2 separate braking systems and not being as smooth.)

I think part of what you wrote was better ball bearings to reduce friction- that would always help (without needing an alternator), but easier said than done.

"Same as ebay you're saying" should say "same as what you're saying"

Your question about how much energy goes back to the batteries is interesting. EVs have a greater benefit in city driving because your main drain is all the stop-starting, so you get a lot back from regen braking. That's why hybrids are effective. But it's not 100% by a long shot.

I think one of teslas secrets is that the regen is limited by the motor size. Or in other words the faster electric acceration a tesla can achieve than other EVs and hybrids ALSO means tesla can regen larger amounts than others.

So to extend your question - given that a tesla regenerates by taking the foot off the accelerator, does the brake pedal increase regeneration to its maximum? Or just have the default regen plus braking?

@mcgov51, your A and B are not separate things. That's the point. Alternator, when it is creating power, brakes the car. If you use them you are driving brakes on and losing energy, not gaining any.

@grega, my understanding about Tesla cars is that brake pedal has no connection to regen. KISS principle.

@Timo, yes that's my understanding too. And I agree with KISS.

But if a Model S did maximum regen, how much more energy would it get back? If you drive effectively with one pedal of course it should make no difference… ?

I think that the display on the dash gives the hint. Regen can be counted on to get roughly 30-50% energy back. And it varies all the time, dependent upon speed, wind resistance, and terrain.

Timo: I love your description of what amounts to a 'Perpetual Stopping Machine'. ;-)

Bah, what is needed is a return to analogue controls. Turn a big dial to the right for more heat. No more searching menus, finding stupid buttons or screen inputs while driving with the sun glaring on a dirty germ-infested screen.

Analogue is unknown to many younger people, those who only know the dirge that is digital. They will ooh and agh over the elegant design and interface, so much less WalMart than screens and icons...

Analogue controls for most functions (not GPS, etc) and access to a cheap fast charge at electric stations everywhere. That is all that is needed.

I'm sure those who want analog controls will just save up for a Rolls-Royce or Bentley instead.

Tesla's regen is software limited. You can have 0-100% of torque if regen.
If it had front wheel drive and 100% (or even substantially less), you would
actually get very agressive ABS front braking with the motor.

And no, it isn't a trade secret or anything like that. They set the regen with eye on comfort and safety (not to turn the car around on slippery road).

Yet another trolling for proprietary technological insight thread.

What? Evil forces are trying to steal my suggestion for a return for analogue controls? All my wonderful ideas are available to anyone with cash. I can suggest a hollow tree nearby to make the drop in case you do not want to be identified. Tesla has the first option of course.

I've simply been in the ditches for far too long to the point where I see deception and subterfuge and IP infringement everywhere...I'll be alright one of these days.

Static Parking automation:
Considering some features I'd like to have in my Tesla which could be made possible via the sensors used for automated driving, I wonder if some 'static parking' features are (or could be) possible, such as:
1- Having the parked car sensing another cark parking in front of or behind it, and automatically moving either forwards or backwards by some inches to avoid being hit by the moving car (while of course avoiding hitting other parked cars) in case it comes dangerously close.
2- Similarly, the same car could detect a nearby car leaving it's parking space and slide 'out of the way' to let it get out more easily. It should then move back to a reasonable distance from remaining cars. We don't want our car to be stuck with no free room to leave the parking place...

I believe one VW implementation had the wheels rotate 90° ...


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