Now in Dutch production

[Checkswrecks]

Looks like it uses the little SmartCar/Mercedes deisel:

https://www.dieselmotorfiets.nl/eva.html

Looks pretty cool.

 

[Bogey907]

The Canbus display is kewl. I'm looking forward to motorcycles having built-in integrated nav/music systems like cars.

 

[johnny80s]

I did not see a clutch lever?

 

[Joe2Lmaker]

I did not see a clutch lever?

CVT (continuous variable transmission)

Don't ask me what it means. I get a mental image of the Flintmobile.

 

[Leskid]

I did not see a clutch lever?

CVT (continuous variable transmission)

Don't ask me what it means. I get a mental image of the Flintmobile.

CVTs have been around forever on snowmobiles. FF to around 45 seconds on this video and you can see how it works.



Basically, the drive clutch is attached to the crank and is cone-shaped. As the engine revs, clever weights & ramps pull one side of the clutch in towards the other, 'squeezing' the drivebelt and pushing it further outwards, increasing the drive ratio. The driven clutch is the same thing in reverse so the same length of belt works while one clutch is using more or less of it.

Given how many drivebelts my snowmobile chewed-up in a season, I'm not sure I'd like my car or motorbike using them. But I've seen Nissans with the CVT emblem on them so they must be more durable than snowmobile units.

 

[Bogey907]

Given how many drivebelts my snowmobile chewed-up in a season, I'm not sure I'd like my car or motorbike using them. But I've seen Nissans with the CVT emblem on them so they must be more durable than snowmobile units.

My GF has a Nissan with a CVT. It works well, without the clunky shifting of most 4 cylinder automatics. Nissan warranties it for 120,000 miles.

 

[MotorToad]

CVT = what's on your QT-50. I like the idea of a turbodiesel, but I'm not buying that paired with a CVT in dirt. There was something else about the bike that bugged me when I read about it in a magazine, but I can't recall what it was.

 

[charismaticmegafauna]

Well, the EVA should be efficient -- if that's what you're after. Looks like 3-cyl turbo-diesel of moderate displacement coupled with an CVT transmission on a relatively light motorcycle. All this adds up to efficient economy to me.

The Dutch have been building rubber belt CVT vehicles for 50 years.

Modern autos use something-like a 'Speidel' metal watch band between the clutches all running in an oil-bath.

CVTs constantly search for optimum with engine power overcoming the load under acceleration and the load restricting engine speed under cruise in a step-less movement up and down (in and out) through the ratio range.

Conceptually, it's the ideal transmission. In practice, it's been less than stellar.

 

[kolonial72]

CVTs in automobiles do not seem failure-prone, from a mechanical standpoint. According to this article, Ford mechanics see fewer failures in CVT trannies than in traditional ones. Sounds like electronics are the weakest link in these setups.

 

[wfooshee]

The idea of the CVT is not necessarily stepless shifting, but being able to keep the engine in its most efficient rev range. Not enough RPM = luggin, no torque. Too much RPM = engine wear, fuel waste. And that point of efficiency changes with load.