When I was a sprog with my Suzi TS250M I could wheelie like nobody's business.
Now I've spent my life on the road, I want to keep both boots firmly planted.
On top of that; wheel, tyre, forks, frame & head bearings take enough of a battering in everyday use, wheelies just knock the crap out of them even quicker.
Plus they draw unwanted attention most of the time.
So don't feel bad about not being a wheelie king, you don't need to prove anything.
i'm hung up on this swirl induction thing. i'm wondering if it's something like this:
The venturi effect isn't as pronounced as i intended. this would have to be downwind of the throttle plate, and I'm thinking the "bypass port" could originate in the throttle body/induction module, and end up going into the cylinder head, coming out directly upstream of the valve.
the port where the "bypass" air returns to the main intake tract would have to be at an angle tangent to the inside of the bore. if that makes sense. that should produce a swirling effect. in my limited understanding of things.
So don't feel bad about not being a wheelie king, you don't need to prove anything.
Reality is, I have little desire to learn to ride a wheelie. I used to be able to do it on my stingray bike as a kid. I would literally ride around the block in a wheelie no problem. No desire on a street bike though.
The swirl thing they mentioned reminds me of the "Twin Swirl Combustion Chamber" used by Suzuki for a very long time. I think they may still use it in some engines. Very effective design. EBR is doing it differently, but I think similar results.
i'm hung up on this swirl induction thing. i'm wondering if it's something like this...
Jesse- Here are a couple of relevant tidbits from the Cycle News article:
quote:
Controlled Swirl Induction: “Causing a specific type of swirl in the air entering the combustion chamber allows the EBR ET-V2 (East Troy V-Twin) engine to produce more power, a broader torque band and better fuel economy.”
It looks like the bypass port (whatever that is) must be an integral part of the system.
Another point I recall from Steve Anderson's article in Cycle World a couple of years ago on the Barracuda- it would have featured "staggered" opening of the intake valves which was supposed to induce swirl in the combustion chamber. I'd imagine the 1190RX incorporates this as well.
I hope Kevin Cameron will have an extensive article on this stuff in the next issue of Cycle World- I'd love to read his analysis of the engine's features.
There is an article in Motorcycle Mag about Baby Boomer bikes, the Hyperstrada and KTM 990 SM-T. I like both, and everything on paper but haven't ridden either of them yet. I'd like to see an EBR compete with these two.
I'd love a writeup, but not by Kevin Cameron. He seems to be more familiar with inline fours and consistently lets that cloud his judgement with regards to twins. To the point where he made a damaging, gross and obvious mistake that get all the way to print.
And the followup cycle world "apology" was about as non apologetic as it got, and did little to undo the damage the article did.
(Message edited by reepicheep on October 21, 2013)
Taking a guess here but I suspect the bypass port still dumps into the valve pocket upstream of the valve other wise you won't have anything sealing it from combustion pressure. If you open that valve slightly sooner than the other (as already mentioned) and give it a small "cross wind" with the bypass port then you can steer the flow even more toward the side of the cylinder to start swirl. Another speculation... the bypass port is fed via the IAC - make sense in my mind anyway. In that regard you could meter the cross wind strength by adjusting the IAC steps at different fuel table map points yet still use it for the traditional purposes of idle and engine braking control.
Or possibly it's a combination of the use of a Fetlockstrongler valve downstream of a Wheeble port, but siamesed with a Bimbler actuator linked to a Freen sensor.
Of course, as I'm sure you'll all agree, this would obviate the need of a scrunge zone but would necessitate the use of a Dingus Position Sensor.
I can't help feeling though that greater minds than mine will have surely tested this setup using a MTGB* or similar equipment.
Another speculation... the bypass port is fed via the IAC - make sense in my mind anyway.
In mine as well. If the external tube exiting the front of the head in the illustration is part of the system, then the IAC or similar component as a controller would make sense. That tube does not exist on the 1190RS motor. That said, creating a swirl effect upstream of the valves, would seem like a difficult thing to do given all the hardware in the way to disrupt the flow. I imagine that one would have to inject the air as close and as parallel to the valve head as possible, but maybe it's easier than I imagine.
I think Matthew's probably nailed it, or at least he's very close. For good highway fuel mileage, this system's going to have to be effective at low throttle openings, and that would seem to work out with the use of the IAC to bleed air in via an auxiliary port almost perpendicular to the normal port opening.
However it works, I'm sure it's cool and I'm looking forward to reading more about it.
Oh yea, Grumpy, shouldn't you be changing the blinker fluid or lubing the knueutsen valve on your truck or something?
Up to 51 mpg in normal use? NOW you're talking. Unless your name is "Froggy" I've never seen more than mid-30s from my old 1125R (and I'm HARDLY the most aggressive rider out on the roads either).
I never could understand how a sub-500lbs motorcycle would get worse mileage than my 850lbs behemoth of a tourer, but there it was.
I used to get even better mileage out of the K1200LT before the switch over to "Drunken Gas." The fact that the EBR can make those mileage claims even with the lousy pump grade fuel available today is impressive (for the record, the LT now only averages low to mid 40s where it USED to get high 40s/low 50s. I did get a reminder of that kind of mileage in 2011 in Wyoming where a lot of the stations STILL had "pure" gasoline).
Blinker fluid was changed at the same time as the dilithium crystals but the invisible grease for knueutsen valves is out of stock & on backorder due to a customs mixup at the Mongolian border.
your theories make perfect sense. i don't know why it would need the IAC however (isn't the IAC a stepper motor which controls the position of the throttlestop?), i would think the amount of air going through the bypass port would be controlled by feedback the ECM receives from the MAF, TPS, Temp sensor, and plugs. Assuming the EBR ECM gets readings from the sparkplug, like HD does.
Whoever is responsible for that setup deserves a cookie. and should design a retrofit kit for my 1125.
I project "swirl induction" in harley's future. But it will be called something different, because they have to have their own terminology. vortechnology or something stupid like that.
I do believe "swirl induction" has been done before.
1930s aero engine designs, I seem to remember from my apprentice days.
Induction swirl to get a better combustion has been known about for a long long time, but, like many technologies, has been remarkably refined with computer modeling techniques & new materials in recent years.
If you're interested in engine design, do some research on a chap called Harry Ricardo.
Thanks Mr grumpy. I always enjoy learning about machines and their development through the years.
I'm just imagining that once HD sees this blatant example of an american high-performance motorcycle capitalizing off of swirl induction IOT achieve more HP and more bottom end torque, they will think, hey that's a good idea. and then they'll market it with their own harley twist to make it an exclusively harley design.
LOVE the looks of the bike, especially in "Racing Red" but, as Clint Eastwood so eloquently said: "A man has got to know his limitations," and this bike is DEFINITELY on my "Murtagh List."
Just patiently awaiting something along the lines of my old 2000 M2 Cyclone (but with more reliability and power, and less HEAT).
