V-Twin Diesel with CVT and Reverse

[pietenpol2002]

This might appear to be the ultimate diesel bike engine. Especially if one were to desire a sidecar. I'm not entirely certain, but I wonder if it's a knockoff of the Yanmar water-cooled V-twin. The combination of a CVT, gearbox with reverse, and an output shaft that aligns with many shafty final drives makes for a very desirable package. The seller even claims it's intended for motorcycle applications. However, given the Malaysian Airlines debacle in Ukraine, I might not want to be picking one up in downtown Moscow any time soon.

Use your on-line translator of choice.

http://xn--80a3aeej.xn--p1ai/%D0%B4%D0% ... light_EV80

[tappy]

That looks to me more like the Punsun / Winsun 800cc V-twin. They do various "packaged" versions, one of which includes a CVT system with reverse, all ready to go in a small car. Those are of course air-cooled...

[pietenpol2002]

I do believe it's a Chinese knock-off of the water-cooled Yanmar 2V78 turned horizontal. To my knowledge Yanmar only produced this engine as a vertical design, although we have a member here on the board who did the conversion to horizontal. But, not his in the link below.

http://mbryner.fatcow.com/listerengineg ... temId=5330

Additionally, even though the Chinese version has low, high, neutral, reverse and park, I doubt that the low/high shift can be done on the fly. Scroll down for more detail.

http://www.haigepower.cn/product/139472 ... ssion.html

And given how wide/long it is (depending on orientation), it might be best to simply mate the engine to a Ural or Dnepr box for your reverse.

http://www.youtube.com/watch?v=mBjpckJugec
https://www.flickr.com/photos/emscherbl ... 693874885/

I might guess the 2 examples above are of Kipor/KAMA origin.

[Blunt Eversmoke]

Well, the package would be far more neat and acceptable for longitudinal mounting if it only had the CVT, sans gearbox. When I erase the gearbox from my mental picture of that package - just the CVT doesn't add all that much bulk even as it protrudes to the side somewhat. Driver's legs go well over that if a chopper style feet forward riding stance is utilized, and the passenger can probably be given foot pegs that keep their right foot out of harm's way comfortably, as well.

For a classic seating, however, the CVT would have to sit in front of the engine, and be, preferreably, separately mounted so as to facilitate installation on the bike, and have its output shaft face rearward. Thus it would stay well away from the driver's foot, and an output shaft running aside the engine would take away much less space than the gearbox. Just need some way to invert shaft rotation.

So - ditch the gearbox and we have a good idea, I'd say. Maybe for the reverse, a couple of steering assist pumps could be utilized - one driven off engine, one used as motor directly on one of the wheels? Easy to rig up, known tech.

[coachgeo]

...So - ditch the gearbox and we have a good idea, I'd say. Maybe for the reverse, a couple of steering assist pumps could be utilized - one driven off engine, one used as motor directly on one of the wheels? Easy to rig up, known tech.

For reverse go with a second Alernator and Copacitor (or large primary alternator). Put an electric hub in the front wheel. Now you got reverse and an on demand 2wheel drive.

[Blunt Eversmoke]

For reverse go with a second Alernator and Copacitor (or large primary alternator). Put an electric hub in the front wheel. Now you got reverse and an on demand 2wheel drive.

Reverse, OK. But 2WD? An affordable in-hub motor has how much, 0,5 to 2 KW. What's the point? Especially since for muddin', which is about the only 2WD application, you wouldn't want anything electric in a place as vulnerable to mud and water as the front hub...
Or was that meant as a joke? In that case - LOL

[coachgeo]

For reverse go with a second Alernator and Copacitor (or large primary alternator). Put an electric hub in the front wheel. Now you got reverse and an on demand 2wheel drive.

Reverse, OK. But 2WD? An affordable in-hub motor has how much, 0,5 to 2 KW. What's the point? Especially since for muddin', which is about the only 2WD application, you wouldn't want anything electric in a place as vulnerable to mud and water as the front hub...
Or was that meant as a joke? In that case - LOL

I was serious but Ill take a laugh where I can get them. I have too little clue about comparable comlexity cost and efficency nor weight between an electric and hydraulic front drive wheel to take a stand either way except that electric bikes are have been on the market for a few years now along with electric motorcycle hub motors for home builds. Hydraulic is still mostly in the barn except one offroad company (front wheel only; no reverse)

[Blunt Eversmoke]

I was serious but Ill take a laugh where I can get them. I have too little clue about comparable comlexity cost and efficency nor weight between an electric and hydraulic front drive wheel to take a stand either way except that electric bikes are have been on the market for a few years now along with electric motorcycle hub motors for home builds. Hydraulic is still mostly in the barn except one offroad company (front wheel only; no reverse)

So you WERE serious after all In that case I have to say that...

http://ev-propulsion.com/motorcycle-hub-motors.html

...You are absolutely right as far as availability and data goes: 10 KW continuous, 30 KW peak, can be had with double motor on wheel so you can double that; pretty light sans batteries. All cool.
But here comes a big but:

Price. If your goal is a pure or hybrid electric, or if you absolutely need 2WD, yes, it might be worth the $ 1300 per motorwheel. If you only want a reverse gear, two hydraulic steering assist pumps (one for use as your reverse motor) 25 euros a piece when used, about 100 euros a piece when new, give you far more value for the money. Like, in the order of magnitudes