mangogrooveworkshop
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| posted on 7/4/10 at 10:02 PM |
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Clever gearbox design
http://www.abc.net.au/tv/newinventors/txt/s2865950.htm
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MakeEverything
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| posted on 7/4/10 at 10:06 PM |
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Excellent.
There will still be a high demand for Type 9's and renault transaxles though!!!!
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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tomgregory2000
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| posted on 7/4/10 at 10:17 PM |
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No more red line smoking starts then 
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tegwin
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| posted on 7/4/10 at 10:24 PM |
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Been things like this around for a while..
The one I remeber is the two cones with a belt for constant variation gears..
The big issue with that design is going to be the drag from all the counter rotating gubbins etc....
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Would the last person who leaves the country please switch off the lights and close the door!
www.verticalhorizonsmedia.tv
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MikeRJ
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| posted on 7/4/10 at 10:45 PM |
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There are many different types of CVT and IVT, but they all have various disadvantages. If this guy has managed to make an infinitely variable
transmission that doesn't rely on traction drives, or ratcheting mechanisms etc. that are lossy, torque limited and/or don't give smooth
output rotation then he will very likely become rich.
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robocog
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| posted on 7/4/10 at 10:57 PM |
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Daf Variomatic is the only one I can think of
http://www.youtube.com/watch?v=R8AzqtomwD0
Never been in one to pass judgement..but would have thought they would still be in used if they wre any cop?
Another way could be to use hydraulics
eg engine driving a hydraulic pump, and using hydraulic motors on each wheel?
(vaguely recall a 2WD motorbike prototype using something similar...may have been on here even?)
Happy enough being in full manual control over what gear and when....regular automatics always panic the bezeesus out of me whenever i'm forced
into driving them
constantly worried they will stall at junctions or 'forget to change gear" or even worse decide to change into an inaprpriate one one the
motorway!
I'm not 100% sure how automatics work (other than black magic and valves bathed in foul smelling "cats pee" smelling oil) and not
sure it would put my mind at rest even if I did vaguely understand them better...
Regards
Rob
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richardlee237
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| posted on 8/4/10 at 06:42 AM |
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From what I can see it is an epicyclic gearbox with the annulus gear controlled by a driven layshaft which needs a variable speed drive.
If so then the design has been around for years on things like aircraft constant speed propellers
The question for automotive use is how do you control the layshaft without introducing unacceptable losses.
Quote Lord Kelvin
“Large increases in cost with questionable increases in performance can be tolerated only in race horses and women.”
Quote Richard Lee
"and cars"
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coozer
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| posted on 8/4/10 at 07:11 AM |
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quote:
Originally posted by tegwin
Been things like this around for a while..
The one I remember is the two cones with a belt for constant variation gears..
My old 2 stroke Speedy has cones and springs and belts.... wish it had a 'normal' box!
1972 V8 Jago
1980 Z750
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MikeRJ
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| posted on 8/4/10 at 11:20 AM |
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quote:
Originally posted by richardlee237
From what I can see it is an epicyclic gearbox with the annulus gear controlled by a driven layshaft which needs a variable speed drive.
If so then the design has been around for years on things like aircraft constant speed propellers
The question for automotive use is how do you control the layshaft without introducing unacceptable losses.
Reading the patent that does appear to be the case. It's not dissimilar to Toyotas "Hybrid Synergy Drive" on the Prius that uses
epicyclic gears to split power between two motors and the internal combustion engine. In Toyotas case they use one of the motors to provide the
variable speed drive.
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