Attached are a couple of files that appear to indicate progress with a
direct injected multifuel approach.
The first is of most interest, because if the Wankel SuperTEC KMM502 and
KMM503 make it to production, they may instantly become a very cost
effective source of an engine. Â More and more photos of this design
appear to be emerging on the WWW.
The second file was captured from a Russian web page. Of interest to me
is the information about ceramic coatings.
Just wanted to share this with our "Rotary" community.
"Thinking outside the box"
JCP
Do you have a link for that Korean pdf John? Too big at 2.7 meg topublish
on here.
We have had bad luck with ceramic coatings coming off and
destroying the rotor housings.
----------------------------------
Also those engines appear to be charged cooled like the Rotamax.
I don't know how many charged cooled engines people need to make
before they figure it out that charge cooling is not the best way to
design a Wankel engine. I predict this company will turn out
to be a loser. Charge cooling is giving the Wankel rotary engine
a bad name.
-------------------------------------------
I watched all the videos on the web site
http://www.lmlkorea.com/ and it may not be charged
cooled. It has plain journal bearings. That implies an oil
cooled rotor like the Mazda. If they make it.... it
might be a dream come true. It has a unique combustion chamber shape
and
direct injection. Who knows? They might pull
it off.
Paul Lamar
It's interesting that KKM502 is listed as an NSU product here:
http://cp_www.tripod.com/rotary/pg05.htm
Matt-
KKM502
*IS* a NSU Product. I was there.
WST spells it Kkm502. (copycats)
Regards
Rolf
I uploaded the video to youtube.
http://www.youtube.com/watch?v=Sw3-X6Zn3E0
Do you see any changes from the original KKM 500?
Paul Lamar
Appears to be an light weight water/oil cooled P-Port design.
Notice the oil pan in some photos.
Design also seems to be far along, as photos show die castings.
Not the crude sand castings of RotaMax.
(RotaMax scared the heck out of me at Oshkosh 2008,
as they appear to have zero engineering capability !)
Check out US patents 7234374, 7234924, 7264454 and 7491046.
US Patents are available at
http://www.uspto.gov/patft/
Will need to download and install TIFF viewer available on same site
Yes a dream come true.
But only if it goes into high volume commercial production.
Not a dozen at a time for some top secret military drone project.
At a half million a copy !
KKM is the German abbreviation for a Wankel engine.
JCP
Here is a better patent retrieval site.
http://www.pat2pdf.org/pat2pdf/foo.pl
Here are some pictures of charge cooled Wankel Gmbh engines
which this may be a follow on.
------------------------------------------------------
After looking at the patents and this web site
probably not a follow on of Wankel Gmbh.
It is a whole new look. LOTS of new stuff. Too bad!
It will take millions to develop it. All sorts of
subtle problems are possible. Two million Mazda
have been made and they are still making small changes.
One area that may be a problem is the narrow rotor bearing.
That will limit the max RPM and the HP.
They should have scaled down a Mazda. Don't hold your breath.
I will say it is head and shoulders better than the Rotamax.
Paul Lamar
From the video there is not much to compare.
A key difference I see off hand is the cut-out pocket in the rotor being
much deeper at the leading side.
KKM stands in German for _
*K*_reis_*K*_olben*_M_*otor as opposed to
DKM, for _
*D*_reh_*K*_olben_*M*_otor.
The initial version by Felix Wankel was the DKM where the housing was
rotating as well and the eccentric was stationary.
There were no balancing masses need, and balancing was limited to
balance the individual parts themselves. These were the rotor and the
housing, the rotor being the easy part.
This engine could run at very high speeds, and that was the eye catcher
initially. Some 29 hp our of 125 cc (7.6 cuin) at 17,000 rpm
Each rotor flank had a spark plug.
But getting the charge in and out was a problem having the housing
rotating. Central shaft canal were used, but still, this was not
practical for mass production.
Then NSU (Paschke) made the "kinematic inversion' of having the housing
stationary and the eccentric (eccentric shaft) rotating, which is the
configuration of all Wankel engines used to date.
Rolf
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