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View Full Version : comprex supercharger, this will confuse you :)


Dervy
08-09-11, 07:17 PM
went to the scrappy today and found this, i have never seen one of these before, and afder looking at info online im only slightly convinced i know how it works lol.

http://i37.photobucket.com/albums/e69/amandayork_photo/Picture001-3.jpg
http://i37.photobucket.com/albums/e69/amandayork_photo/Picture005.jpg
http://i37.photobucket.com/albums/e69/amandayork_photo/Picture003-2.jpg
http://i37.photobucket.com/albums/e69/amandayork_photo/Picture006-1.jpg
http://i37.photobucket.com/albums/e69/amandayork_photo/Picture014.jpg
http://i37.photobucket.com/albums/e69/amandayork_photo/Picture008-2.jpg
http://i37.photobucket.com/albums/e69/amandayork_photo/Picture016.jpg
http://i37.photobucket.com/albums/e69/amandayork_photo/Picture013.jpg
http://i37.photobucket.com/albums/e69/amandayork_photo/Picture007-2.jpg

please google it and try and understand how it works :)
Spudly
08-09-11, 07:21 PM
At first glance, it looks to be a turbo and a supercharger in one package....?
Spudly
08-09-11, 07:24 PM
Well before googling it, im like..... :)



After googling it, im like............. :tard:
mowgli
08-09-11, 07:27 PM
http://en.wikipedia.org/wiki/Pressure_wave_supercharger

not that it made much sense to me, but it does have some funky design stuff, i'm guessing there is more to it though

http://imagineauto.files.wordpress.com/2007/09/comprexanim.gif
pressure wave supercharger
MK999
08-09-11, 07:36 PM
Interesting, uses the exhaust pressure to compress the intake charge. Probably crap as you'd end up with a % of EGR throughout the rev range and I doubt it has much in the way of pressure increase with an intake that will be roasting hot, interesting though lol
Dervy
08-09-11, 07:38 PM
lol spud yea thats what i was like, basically it use`s the exhaust gas pressure to pressure up the intake gases, so its a pressure exchange. the exhaust gas and the intake gas dont actually mix though which is the cool bit
mowgli
08-09-11, 07:38 PM
its all to do with the pulse tuning.... but certainly pretty crazy technology
MK999
08-09-11, 07:38 PM
Must do, look at the soot on the intake outlet.
Dervy
08-09-11, 07:44 PM
Must do, look at the soot on the intake outlet.

no only very small amount of exhaust gas mixes, only as much as you get with normal egr.
thedjse
08-09-11, 07:47 PM
What car is it off?
mowgli
08-09-11, 07:48 PM
mazda??
MK999
08-09-11, 07:48 PM
no only very small amount of exhaust gas mixes, only as much as you get with normal egr.

Well then it still mixes :p It will mix at WOT as well which isn't what you want.
mowgli
08-09-11, 07:52 PM
mk999, the vanes & port design is apparently set to pulse the gases to the right place....
Dervy
08-09-11, 07:52 PM
Well then it still mixes :p It will mix at WOT as well which isn't what you want.

WOT ????

mazda 626 diesel

and moglie is right about the pules
MK999
08-09-11, 07:53 PM
You will still get mixing though, you're sending 2 turbulent gases crashing into each other, it's somewhat inevitable.

WOT= Wide Open Throttle.
Dervy
08-09-11, 07:56 PM
You will still get mixing though, you're sending 2 turbulent gases crashing into each other, it's somewhat inevitable.

WOT= Wide Open Throttle.

thats the point mark the gases don`t crash into each other
MK999
08-09-11, 08:07 PM
thats the point mark the gases don`t crash into each other

Then they don't pressurise either lol There's no valves etc on it as far as I can see, so in some way or another pressure is being applied to the intake, that will lead to inevitable mixing.
mowgli
08-09-11, 08:25 PM
mk999, you are missing the concept by some distance

what you are also forgetting is that as its crank driven, so it pulls the air in & pulls it out too, it is in effect, a super charger & an expander, but in the same body.. and by allowing a bit of egr at low revs, its probably quite clean...
Dervy
08-09-11, 08:26 PM
no as mowgli said it use`s pulse`s, thats why this is also could a pulse wave supercharger, you know how a pulse works.
MK999
08-09-11, 08:32 PM
I understand how it works, however you can't punch a wall without losing some of your skin to it, same as you can't pulse an exhaust into an intake without losing some of it. Which is evidenced by the intake looking like the tailpipe on my diesel. It's also only crank driven as a timing thing, there's no pressure added by doing that.
mowgli
08-09-11, 08:38 PM
the vanes spinning round at several thousand rpm will have quite a big effect on boosting it.. but as it came off a diesel, its all about low end torque, and the variable valving will have to be tuned to a particular engine...merc have been playing with variable diameter inlets for years on their turbo engines, and getting really good performance..i'm guessing that merc have the patent, so others look for funky alternatives..
MK999
08-09-11, 08:56 PM
There is no valving if you look at it, it works like the ports on a 2 stroke.