VLR bumblebee AWD bike, ASC system, geared hubs.

[vvk_rvn]

The mini-moto is built according to an all-wheel drive scheme with 2x1kW gear motors, controled by two KLS4812S with addition ASC(anti-slip-control) system to prevent any wheel slip. Peak power 2kW on each motorhub. The total moment is 84N.m. Maximum speed 75 km / h.
Three-crown front fork - with progression levers, separate patent.
Rear swingarm - with progression levers too.
Handlebars - clip-ons with ergonomic grips.
The false tank is made of carbon composite with a reflective layer under the varnish.
The battery has a capacity of 1.7 kW / h (14S10p 18650, 58.8V max, 33Ah)
Power supply to start the system in standby mode - by pressing the button on the tank.
Throttle stick - right lever type.
This concept implements the anti-slip system (ASC anti-shift control v2).
Brakes are hydraulic, rotor diameter 203mm (front) 185mm (rear). Brake machines are equipped with limit switches that work even when the brake levers are lightly pressed.
The bike is equipped with an exclusive 50W headlight. Also installed are custom-made brake lights and turn signals.
When the ignition is turned on, Day Light glows - two narrow LED sources that are clearly visible even during the day.
Using the buttons on the left hand remote control, you can turn on the low or high beam(control by Servo motor inside head lamp with turning main lens to an angle).
On the control panel, near the left grip, there are five buttons. A short press on the button turns on a certain function, a slightly longer press turns it off. The upper left button is the left turn indicator, the right one is the right turn indicator, the middle button is the ASC system ON/OFF, the lower right button ON/OFF main light, the lower left is the high beam. The remote control is located very ergonomically and allows you to effortlessly use all the functions while driving.
The bike is charged by a built-in charger 58.8V 12A. Charging time from almost completely discharged to 80% - 2 hours, to 100% - 3 hours. The bike has a built-in GPS tracking system.
An extraordinary feature of the bike is the presence of a 1.2 kW gasoline generator, which allows charging the battery even on the move in sequential mode.
Bike frame made of chromium steel, brass brazed.
Total weight of the bike 52kg.

Videos of fork working:
https://youtu.be/7akoU2Qfgno


Some winter videos:
https://youtu.be/EVOVdokFwA8
https://youtu.be/78hzglc9aoQ


Photos of creating:

View attachment 7View attachment 2

 

[COAR]

That's certainly a unique creation. Finished product looks very polished so you definitely have some fabrication skills.

With the generator you've basically created a hybrid motorcycle. Or rather a plug in hybrid. If there's no direct connection to the drivetrain it'd operate a la BMW I3 w/ a range extender. It would probably be more efficient to just drive the rear wheel directly with an ICE (add in a clutch so it can disengage but I suppose the generator allows you to retain the AWD and not have to deal with any belts or chains to transfer power.

That fork is an interesting design as well. I've never seen anything like it.

 

[vvk_rvn]

Thanks for your reply.

You are right, about no having belte or chain and AWD fulltime,
also, generator works on stable rpm, therefore has a maximum efficiency as for engine as for generator machine.

Fork is an own development, there were three prototypes before. It has all the benefits of a progressive suspension, and it also doesn't compress when braking like a conventional fork. In addition, it is designed for high torque at the front wheel.

 

[Logic11]

As the electricity is more off than on here nowadays (The New... South Africa) I'm very interested in the engine generator:

Finding a small, efficient ICE and generator/alternator where the ICE's max efficiency RPMs and power match those of the generator is no small feat!
What ICE and generator are you using?
Are they connected by belt or chain? Geared to a ratio?

I can understand people turning up their noses at the Engine - Serial Hybrid System in countries where a power outage is a major news event,
but
I'm surprised by the lack of interest in your progressive, anti-dive suspension here. I guess it doesn't look 'pretty'..?
I saw puck fretty! Gimme Anti-dive over pretty any day!

Then the anti-slip/skid system trekking through snow!
https://www.youtube.com/channel/UCNe6hWAvNfZm48h1-fslrhg

All in all; I love it! Great job!

 

[vvk_rvn]

Thanks for interesting the project)

What ICE and generator are you using?

I used an ICE similar to a grass mower engine, 37cc, from 1kW invertor type generator.
I changed the alternator coil reduced voltage to my ACU level (58.8V). Also I threw out the inverter and replaced it with my designed charger. I left the carburetor, changing the settings a little.
I have made circuit for RPM control by changing throttle position with stepper motor. It have two steps: 3200rpm and 4500 rpm, that gives me two levels of power: ~700W and about 1kW.
In close cycle, when use bike in the city, charge of ACU gives me about 40-60km of range, and now I am using 2,5L gasoline tank - it add about 90-100km more.

Nearest future there will be an update of project info. There is a war in my country, the lack of gasoline forces the use of electric vehicles constantly.

Some alternator parts and generator ICE you can see on photos.

 

[Logic11]

I used an ICE similar to a grass mower engine, 37cc, from 1kW invertor type generator.
I changed the alternator coil reduced voltage to my ACU level (58.8V). Also I threw out the inverter and replaced it with my designed charger. I left the carburetor, changing the settings a little.

Thx so much for the detailed reply vvk_rvn.

Ah; so the genetator windings have been changed to give the exact voltage you want for charging, without ant heavy ad wasteful transformers.
Thought as much.

I have made circuit for RPM control by changing throttle position with stepper motor. It have two steps: 3200rpm and 4500 rpm, that gives me two levels of power: ~700W and about 1kW.

I assume step 1 is for charging the battery at the battery's max charge amps?
While step 2 gives more amps, but the extra amps are used by the motors, rather than stressing the battery?

Did the winding change negatively affect the optimal ICE/gen RPMs?
ie: Is the generator at optimal efficiency RPMs at the ICE's optimal efficiency RPMs?

In close cycle, when use bike in the city, charge of ACU gives me about 40-60km of range, and now I am using 2,5L gasoline tank - it add about 90-100km more.

2.5L/100km isn't bad at all!

To improve ICE efficiency:
As the ICE runs at a fixed RPM (2 in your case) a tuned length exhaust is the 1st thing I'd try as the stock thing is highly restrictive to fit in a small space.

The maths:
http://mezporting.com/exhaust_length.html
(Similar maths for intake on same site IIRC. NB Bell Mouth. 1/4 the exhaust volume changes maths)
https://www.musclecardiy.com/performance/mastering-exhaust-system-math-build-high-performance-engines/
https://www.musclecardiy.com/performance/exhaust-system-performance-math/

NB that you cant just put a glass pack muffler after this pipe.
See around/after the 290 min mark here:
https://www.youtube.com/watch?v=5keTM9eyCOg
You need a pressure wave terminator box:

(Has some anti reversion = wider rev range...)

NB that glass packs kill high frequencies, but low frequencies aren't attenuated...)

2nd thing I'd try is electronic fuel injection. There are many small engine kits available and I have no experience with them so cant make recommendations.

Nearest future there will be an update of project info. There is a war in my country, the lack of gasoline forces the use of electric vehicles constantly.

More people are murdered here per annum than were killed in the Vietnam War, so know the feeling.
Here its electricity that's short. (No maintenance or expansion since the Old SA)

 

[Logic11]

Has anyone LOOKED at this front suspension and thought:
"I could put a mid drive and gears on that front wheel with no unsprung weight penalty!"

Sometimes I wonder...

 

[Logic11]

Also; take a look at the magnets in that genset 3 posts up.
Those look like std old Ferrite Magnets..? Grey-black and one has a corner missing.

That means that one could get a huge boost in performance and efficiency out of those cheap little gensets simply by replacing them with neodymium magnets?