by "Demon-Xanth knows how to operate a street." (demon-xanth)
Published 01/12/2017 at 09:00
by "Demon-Xanth knows how to operate a street." (demon-xanth)
Published 01/12/2017 at 09:00
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STARS: 3
"bhtooefr" (bhtooefr)
01/12/2017 at 09:02, STARS: 0
Because that’s the only way you’ll get enough compression with a Wankel, to light off diesel fuel - compress it twice.
"Demon-Xanth knows how to operate a street." (demon-xanth)
01/12/2017 at 09:04, STARS: 0
Yep, the first effectively becomes a turbocharger.
"Daily Drives a Dragon - One Last Lap" (ddadragon)
01/12/2017 at 09:05, STARS: 0
Wait so it’s boosting itself. Right....
Who’s idea was this?
"Demon-Xanth knows how to operate a street." (demon-xanth)
01/12/2017 at 09:07, STARS: 0
Rolls Royce.
"Daily Drives a Dragon - One Last Lap" (ddadragon)
01/12/2017 at 09:11, STARS: 0
I assume it works stunningly well.
"Smallbear wants a modern Syclone, local Maple Leafs spammer" (smallbear94)
01/12/2017 at 09:12, STARS: 0
Stick it in a brown manual Miata wagon and that’s everything Oppo stands for.
Mind you I’d still rather my truck but with a manual and an LMK Duramax.
"whoarder is tellurium" (whoarder)
01/12/2017 at 09:15, STARS: 0
"Demon-Xanth knows how to operate a street." (demon-xanth)
01/12/2017 at 09:16, STARS: 0
Don’t think it made it past prototype, so not really...
http://www.thedieselgarage.com/forums/119-parking-lot/95286-weird-rolls-royce-diesel-wankel.html
"Daily Drives a Dragon - One Last Lap" (ddadragon)
01/12/2017 at 09:34, STARS: 0
I think it’s just a bad idea.
"Demon-Xanth knows how to operate a street." (demon-xanth)
01/12/2017 at 09:38, STARS: 0
It did make sense in the HP/LB and HP/space needed area. It just lacked too far in other key areas to be desirable. So it definitely was worth investigating, but like other wankel programs, just wasn’t worth moving to production. I do have to admit, a 20B in my Corvair would probably work phenomenal.
"Cé hé sin" (michael-m-mouse)
01/12/2017 at 09:53, STARS: 0
It’s a bit like a supercharged two stroke diesel then - they can’t get enough air in using natural aspiration to provide any decent amount of power.
"bhtooefr" (bhtooefr)
01/12/2017 at 10:04, STARS: 0
So, all 2-strokes require a pressurized intake to function at all - there’s no vacuum formed to allow intake air into the cylinder, and the pressurized intake air also helps blow exhaust out of the cylinder.
Most 2-stroke gasoline engines use the crankcase, which is pressurized by piston motion, as the intake manifold. However, that means that you have to have a total-loss lubrication system, which is unacceptable for a heavy duty engine. That’s why 2-stroke diesels have an external blower, but it’s barely creating any pressure at all - just enough to get the air into the cylinder and push out the exhaust.
This will actually be generating appreciable intake pressure, because the goal is to actually compress and heat the air enough for diesel fuel to light off spontaneously in it. A wankel mathematically is unable to get much over 9:1 compression IIRC, where modern diesels are around 14-17:1, and old diesels were around 20:1. So, compress 9:1 twice, and you get about 18:1 compression ratio.