Comments on: Torque e-bike by Emil Møller Pedersen

By: Rich

Rich — Mon, 17 Oct 2011 22:11:33 +0000

This design would not be efficient for inputing human power. There’s nothing wrong with a standard hub motor that has a freewheel with gears, and normal bike chain. The rider can input instant power with 98% efficiency. The motor/controller/battery system is only about 80% efficiency for each stage.

By: Jason

Jason — Mon, 16 May 2011 06:40:14 +0000

Hi, Do you know what is Centric Motor System with Linear Signal Torque Sensing Mode for pedelec? Though Panasonic is Centric Motor System but it is Pulse Signal Torque Sensing Mode only, while other common one is Front or Rear Motor System with Pulse Signal Speed Sensing Mode.

By: David K Fried

David K Fried — Sat, 23 Apr 2011 06:50:27 +0000

Well… A chainless bike is just a scooter… Right?

By: art

art — Wed, 20 Apr 2011 13:35:55 +0000

Nothing in this design represents an insurmountable engineering problem unless you want it at a very low price point. Single sided hubs are all over the place, and I can see no problem fitting standard lithium ion batteries into the donut.

The only thing I would do differently as an engineer is move the bearings from inside of the rear hub to in the chainstay and have a rigid axle connected to the hub shell. That way the disc brake can be moved outboard, and the rear wheel can be a little more balanced.

By: Electric Bikes - Electric Bike News - Reviews - Trends - Information

Electric Bikes - Electric Bike News - Reviews - Trends - Information — Fri, 15 Apr 2011 06:52:32 +0000

[...] the complete article at: Torque e-bike by Emil Møller PedersenRelated NewsZero S – Two Wheeled Commuting of the Future?Engadget Reviews Brammo Enertia [...]

By: wilson

wilson — Fri, 01 Apr 2011 18:05:47 +0000

I’m happy than in Argentina we have no limit on bicycle speed limit. I know to or three cases of guys that modified 2 sotroke 80cc motors for bikes and goes near 60km/h. I wonder how they brake. By the way, helmets are not popular.

By: Dan

Dan — Thu, 31 Mar 2011 23:00:19 +0000

Electric bikes want ever be a big thing in europe. People younger than 50 dont want to ride at only 25 kmh. I’am midt forty and don’t consitter my self to be in very god shape, But still only do below 25 kmh for about 35 meters. The rest of the time the e-drive wouldt be ded weight. If it’s to be a succes it nets to help me op hill and head wind. An that’s not at 25 kmh. Slower than 30 kmh and i go in the car. They also increased the fines for doing more than 30/45 on mopet, So now we got to old cars!!!

By: Emil Møller Pedersen

Emil Møller Pedersen — Tue, 29 Mar 2011 09:36:58 +0000

Hi Mike
You are right that the only reason for a major engineering decision should not be style. But I do think the designer should challenge the engineering aspect sometimes. And I do think that the decision to make it single sided helps with making the bike different from a normal bike and causes it to stand out. Which was one of my primary goals.
And no I should not be a fashion designer!

I’ve sugested the use of 18650 batteries for my bike. There should be room for 30 batteries in the ‘donut’. According to the battery specialist I’ve asked the amps of the 18650 should reach 4.0 (2.6 today) in the next 5-8 years. And that should be more than enough to assists the user more than 50 kilometers.

A prototype would have been nice. But sadly I did not have money or time to make one. And I had to show something at my presentation, that is why I made these renderings.
The nearest I came to a prototype was this model: http://dl.dropbox.com/u/3476017/Torque%20model.jpg

By: Will

Will — Mon, 28 Mar 2011 19:19:19 +0000

I agree with Mike on this. Brutal design reviews were common and expected when I was in school. Hell, they’re common and expected now that I do proposal work. Everyone gets offended when someone tries to shoot down their work, but that’s the way things are, and getting hurt over it won’t help you. Also know that you won’t win over everyone in the room. Sometimes a good review is simply one where you had a reasonable reason for each reasonable question, and let the zingers go by with a “I’ll look into that for my next revision” or something along those lines.

By: Mike

Mike — Mon, 28 Mar 2011 18:08:43 +0000

The shape of the swing arm is limited by the fact that it has to enclose the chain, which absent some really goofy mechanicals has to run parallel to the centerline of the bike.

I may come off as pretty negative, but I’m not any tougher on these guys than the people who they would need to convince to spend money on their idea would be. If they’re not getting this level of critique from their instructors they should ask for a refund of their tuition.