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Post by FrankenMech on Aug 26, 2016 23:44:28 GMT -5
Ahhhh, another project! life is so much fun when there are projects to play with.  |
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Post by Chris Cristini on Aug 27, 2016 20:47:40 GMT -5
Ahhhh, another project! life is so much fun when there are projects to play with. You mean something like this? |
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Post by FrankenMech on Aug 28, 2016 3:15:11 GMT -5
Yeah, I think so, I had to watch a few times to catch what was going on. Just use a chain from the crank to the planetary instead of the belt so oil and grease is not a problem. Or reverse the assy and use the planetary on the crank. The ring control motor with a #25 chain can go anywhere, even between the #35 chain strands from the crank to the rear. Just adjust positions for minimum overhung load on bearings. The chains are offset from each other. The ring control motor could mount somewhere back of where the kickstart is now with slots for adjustment. The #35 drive chain can use a spring tensioner or a slotted adjustable tensioner underneath near the rear sprocket. No cooling would be necessary in the case so it can be sealed for grease retention except for a small vent hole on top, like an old car rear axle vent or a barb fitting and some tubing. The kickstart might get lost but hell, -I have never really used mine but once as a demonstration to another old geezer in a McDonalds that asked to see it work. I used it a few times to try to prime the fuel system but that was a PITA. An electric pump was installed instead on my low-mount fuel tank system. I suppose a rope start assy could be used. When I was looking at those Comet CVTs I figured I could bore a 1" shaft to slip over a 50cc scoot crank and weld a section of splines from that kickstart-clutch / fan-holder, whatever it is called, onto the end of the shaft. You might have just come up with a really good solution for sucky belt CVTs!!!  With precise electronic control included Just set your max HP, cruise, and (clutch) engagement RPMs with a dip switch or jumpers. |
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Post by FrankenMech on Aug 28, 2016 17:37:53 GMT -5
Thinking again...
With the planetary setup on the engine calculations are easier for RPM settings etc without an intermediary gear ratio.
With the rear brake applied holding the planetary gears stationary the ring gear control motor could spin the sun gear on the crankshaft for engine starting.
The 125/150cc engine uses an inboard electric starter setup. The 500cc engine uses that outside sprocket for the electric start.
For the speed settings:
1 dip switch times 128 for drive engagement speed
1 dip switch times 256 for cruise
1 dip switch times 256 for power target
I don't know maybe I am cornfuzed. It is time for a nap.
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Post by Chris Cristini on Aug 30, 2016 0:03:12 GMT -5
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Post by Chris Cristini on Aug 30, 2016 10:36:30 GMT -5
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Post by 190mech on Aug 30, 2016 17:24:26 GMT -5
I'm old school and this stuff is over my head..Will that gizmo handle 12000+ rpms of centrifugal force?Does it have the same or better ratio spread as a stupid CVT system??Is it cheaper to build than a CVT?Had ta ask...
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Post by Chris Cristini on Aug 30, 2016 18:18:09 GMT -5
No sir on all of that. Just an other idea. The engine would have to be a slow 4 Poke 5000 or so RPM The planetary gears them selves would be fine and the Electric motor It self could handle it as well Not 12K lol some stuff would come apart. Also I like the stupid CVT system.  It is not practical ATM but It could be. How ever it would never be cheaper than the good old Belt CVT. |
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Post by 190mech on Aug 30, 2016 18:30:26 GMT -5
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Post by Chris Cristini on Aug 30, 2016 18:36:26 GMT -5
I'm really hoping for a better idea!I think Ive already posted about the newer moped/scoot CVT system Honda and Yamaha have out,its all housed in a compact motorcycle style case,reduction gears/clutch also,then chain drive to the rear wheel..     Gotta be a better way!! I like that Idea as well I never got around to designing it so That be next my friend I am already thinking of a design that wont be to close to Honda And some nice swing arms can be designed with better handling in mind. |
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Post by FrankenMech on Aug 30, 2016 19:58:13 GMT -5
Good work!
That Honda and Yamaha CVmatic system would not be cheap either. It would also not work in a standard GY6 application. Engineering is all about compromise.
Faster, Better, Cheaper, -pick two.
The hub motor is Chris' idea, running it off the crank end is my idea. The only parts that regularly see high RPMs are the sun and planet gears. Planetary gearsets see high RPMs in many applications, including the CVmatic above.
Replacing the slide bushings in the common CVT would be a great improvement.
Damn, it is raining again outside.
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Post by Chris Cristini on Aug 30, 2016 21:18:45 GMT -5
I'm old school and this stuff is over my head..Will that gizmo handle 12000+ rpms of centrifugal force?Does it have the same or better ratio spread as a stupid CVT system??Is it cheaper to build than a CVT?Had ta ask... I forgot to mention the Ratio would be spread farther than The normal CVT also you could use Electric motor power with engine power to gain acceleration and top speed only until the power source drains to the point the engine has more power then Regen will happen Takeoff RPM and acceleration Curve could be fully programmable so If you wanted it to take off like you just Dumped a clutch that could be achieved or If you want steady acceleration from 0 to top speed that is possible to. It really is a unique concept that could be realized easier than you think it is way out of the box But all of the parts to make it happen exist And as long as the Electric motor has more torque than the engine which with a small 4 stroke is an easy task this thing could be a rocket think 60 MPH with a stock 49cc 4 stroke the hard part is a 60+Volt LI POLY Pack that is on the cheap side Being the most expensive thing on the build list next to a 3 phase golf cart controller. so realistically cruise Speed would be around 30MPH with the Hub motor charging anything faster or maintaining Speed up hill would deplete the battery going slower than 30MPH the Regen would be lessened so basically it would be charging sitting still as you accelerate to 30 the resistance on the ring gear increases until it is no longer rotating that would be max ratio OD would be when the ring gear gets rotated the opposite direction. Sorry if some of this does not make sense. |
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Post by FrankenMech on Aug 30, 2016 23:35:42 GMT -5
The batteries don't have to be Li-poly either. Plain SLA can be used for testing. NiCd or Nimh can be used also for charging simplicity. With the regen capability the batteries only need some extended surge capacity, not a long runtime. It is a true hybrid design with the liquid fueled motor providing all the power after an initial charge. The batteries add torque for acceleration, hill climbing, and bursts of high speed.
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Post by Chris Cristini on Sept 1, 2016 23:27:40 GMT -5
Some one else came up with a geared CVT this one is hydraulic.
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Post by niz76 on Sept 1, 2016 23:38:56 GMT -5
Some one else came up with a geared CVT this one is hydraulic. Holy shyte that's a lot of gears! I don't get it lol |
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