Hey guys. Haven't posted much on here recently, but this has always been a great resource. I'm working on a build for my senior engineering project. Figured I'd post up the starts to the blog I'm writing, and update here as I go.

http://crecca.wordpress.com/


cliffs: Making a hybrid bike, posting here because it'll get interesting

just looked at the french website and had it translated with google. sweet idea, but will a supercharged single cylinder really be that much better than 2 non charged cylinders?

Neat concept.  But can it do this?
http://www.youtube.com/watch?v=-cM9S2AzU28

I love how the china wiggles on the plastic that it rests on.  Still cool regardless.

That depends on how you define better. Would this be better option for a high speed, long duration run? Probably not. For day to day driving? Absolutely. Imagine a Turbo that offers full boost from 0 rpm to redline, powered by regenerative braking. Essentially you're storing up wasted energy for you want to go fast, and removing the drag of a second cylinder when you don't.

Quote from: gregvhen on March 09, 2010, 09:44:36 AM
just looked at the french website and had it translated with google. sweet idea, but will a supercharged single cylinder really be that much better than 2 non charged cylinders?

senior design ftw.

hold on how long of a design process do they give you?

from what your blog is saying it looks like your doing a 2 year project in less than 2 months?

getting an EE here.

It's a two semester project. I'm about a month and a half in to the first semester. Fortunately, I have several other classes this semester with design projects that I will be using to put me ahead of the curve.

Project for machine and manufacturing design = all the machining and hardware to convert the cylinder to an air pump

Project for thermal power systems = characterizing a motor under a compressed air supply for doing fuel control later

Project for mechatronics = air tank/hybrid system controls design and programming

good luck
i hope you like machining or paying for machined parts lol

check this out for inspriation
http://thekneeslider.com/archives/2009/01/12/ducati-v-one-twin-to-supercharged-single-conversion/

looks like you will be designing a new crank and a new camshaft that opens the intake and exhaust every two piston cycles for the compressing cylinder.
sweet

Quote from: aaronjosephward on March 10, 2010, 08:55:55 AM
good luck
i hope you like machining or paying for machined parts lol

check this out for inspriation
http://thekneeslider.com/archives/2009/01/12/ducati-v-one-twin-to-supercharged-single-conversion/

looks like you will be designing a new crank and a new camshaft that opens the intake and exhaust every two piston cycles for the compressing cylinder.
sweet

I have a link to the ducati in the first or second entry in the blog. The idea here is to combine the mechanics of that set up with the hybrid system of the scuderi air gas hybrid motor.

No need to touch the crank shaft. Cams, possibly. There are 2 options I'm working through designs on for solving the compressor issue and new cams are on possibility. The issue is that no where really has the capabilities to make cams with two lobes without excessive costs. There are also a lot of issues with the ability to maintain enough duration when there are two lobes on the cam instead of one. The other option(and the option the ducati guy went with) is a new valve system using reed valves at the intake and exhaust ports. I have a reed valve in the mail to experiment with this.

Picked up the bike today. $400 for a 96 GS. Has a corbin seat, vance and hines exhaust, and clip ons.

Needs a new tire, the carbs rebuilt, new brake lever, and possibly a new battery(charging it right now to see if it needs replaced).

Got the bike running and riding around. Still needs new tires before I'll trust it for more than just circles in a parking lot though.

do some research on air powered motors, they use tiller motors, and weld onto the cam, then polish it to get compression on every stroke.  may work out ok for u?

The cams can be done that way, but it seems to bring up issues regarding how much duration one can achieve, which really limits air flow into the motor, at least when converting a gas motor over.

Currently, I'm moving forward with leaving the cams stock, essentially removing the valves from one piston, and installing reed valves at the intake and exhaust ports.

I appreciate the input though, the more ideas the better.

As for the bike, it's up in the air at the moment, getting new tires tomorrow. After that, valve adjustment and rejetting the carbs. It's running super rich at the moment due to the p.o. rejetting WAY too large.

Once I get it running in good shape, off to the dyno for some baseline runs and riding around to get some fuel consumption data.

sounds like you have a long way ahead of you!  we love pictures around here, and scans of dyno sheets are more prized around here than 21 yr old virgin strippers that love gs500's!

Got the bike up in the air right now. Liking this rear stand. Cost a whopping $39 at Harbor Freight.


Taking the wheels to get new tires put on them tomorrow. The rear wheel looks like this:

 

Other than a few <20 mph rides around the neighborhood to make sure everything is working, I'm not about to trust that tire to go very far. How the p.o. let it get that bad is beyond me.

the chain is scarier, and oh my, riding without a rubber can be life changing ! (the shifter)

Quote from: ohgood on March 14, 2010, 03:17:49 PM
the chain is scarier, and oh my, riding without a rubber can be life changing ! (the shifter)

The chain is actually almost new. Had a bunch of crap on it when I got the bike, but I cleaned and lubed it and it's looking better.
Not sure why it looks so damn rusty in the pictures.

Low sided the bike today turning onto a street. Bike has been bogging, etc, and generally running like crap at low rpm. Took off from a light slowly turning, it started to bog, I gave it more gas, and it decided it was time to go... straight towards the median. I panicked, grabbed too much brake and fixated on the curb. Dropped it, landed on my foot. Bike has a few minor scuffs, no biggie. I have a knot the size of baseball on my thigh, and my foot hurts like crazy from the bike landing on it.

Wouldn't have been too bad if a cop hadn't pulled up literally 10 seconds after.

Oh well, could have been a lot worse. Was wearing full gear, ended up with one little cut on my knee. The bruises will hurt more, the bruised ego will hurt the most.



Lesson learned... not riding the bike again until I sort out the carbs and spend more time in the parking lot doing low speed maneuvers.

May have broken a bone in my foot. Awesome!

Crap that sucks   Hope you heal quickly. 

This looks really interesting, I look forward to reading more about it