Originally Posted by manic_monkey
modern 2 strokes use direct injection and are very good on emmisions. also, 2 stroke engines are very light and simple. companies which make things like lawm mower engines and generators just use the oldest cheapest technology they can, which doesnt help the reputation of the 2 stroke.
Apparently I missed that post, my previous one was about 5/6-stroke engines.
I'd forgotten about the modern DI 2-stroke, and in CA you can actual find those on any lawn mower made after a certain date... I'm pretty sure it was 2000 but I know they made some weird loophole provisions for overstock and such, but anyone MANUFACTURED after 2000 should have it. So you could use an engine from one of those CA models.
Speaking more directly on parallel hybrids... I need to squeeze extra mileage out of my '87 Honda CH250 Elite (a maxiscooter). Currently she runs like a winner with only 4800 miles on it and 1500 the last two months from me, and I'll be putting another... about 3500-5000 on it by the end of the year. Anyway, my point is mechanical problems are not an issue, but I can only squeeze about 60mpg at 65mph which is my preferred commute speed, and I actually was able to do some way-to-much-free-time testing in parking lots and found out that I'm using significant amounts of gas in stop-n-go traffic (which is half my 70mile round trip commute).
By driving at a lower speed in town and preventing stops or at least reducing the amount of full or nearly full stops I needed brought me up to 64mpg, and reducing my cruising on the back roads from 65mph to 55mph brought me additionally to 74ish mpg (which is more than people claim for it, so I assume since its not a wheelie popper people are heavy with the throttle, I know I was).
I know that under cruising conditions the ICE is about as good as I'm going to get with this (can't afford batts for a conversion), but I'm wondering if I can't turn the bike into either a:
- psuedo-hybrid with a paralleled electric assist for stop an go using only capacitors that would be charging under the idle at a light...
- series hybrid where I toss the cvt tran (which is tiny and on the outside), slap a gen on the ICE make it a rear wheel-motor drive or use a small pancake motor on the side (so I can still make left turns) and then mount the caps on both sides of the bike on the outer panelling (I'll just paint them to match).
I'm wondering if you guys think it would even be worth it? I'd be using capacitance only and later possibly add some batteries to it. There isn't room for batts right now except on the outer side panels and those won't take too much weight, I don't want to overly modify the bike itself just swap some parts here, just in case I can't find a fair price buyer for the converted version... though I could swap the passenger foot rests for pegs and put batteries in the front gap and use it more like a motorcycle (that or just straddle the batteries I guess, lots of good bolts I can expose without modification and use to hold a mounting system).
Anyhoo, I'd obviously need 55mph cruising speed, this would initially be provided with energy by the ICE exclusively, buffered and stored in some good capacitors.
List of Needs
8" or smaller pancake motor producing enough constant power for 55mph cruising -or- 10" rim wheel motor that is capable of those speeds and power outputs (this is a 250cc single scooter)
1 or more capacitors no bigger than about 6 cans of lighter fluid that hold enough power to get it nearly or all the way to cruising speed, or at minimum to 40mph for the stop-n-go
controller that's small, doesn't have regen braking, DC system obviously, has throttle control programming for acceleration and can handle the power.
Ok, I know there's more to it due to voltage and such which might require a large bunch of small caps, but I'm wondering if this would give me any appreciable bonus or minus to my economy?