Posted on 05/24/2023 1:22:18 PM PDT by Red Badger
LiquidPiston says its new XTS-210 solves the efficiency, lubrication and fuel type issues of Wankel rotary engines. This supercharged, liquid-cooled two-stroke claims 5X the power of an equivalent size or weight diesel engine, and 3X the torque.
Targeted at military, commercial and aerospace applications, the XTS-210 is about the size of a basketball, weighs in at 19 kg (42 lb), and displaces 210 cc. It'll run on multiple fuels, including diesel and kerosene/jet fuel. The company is shooting for about 20 kW (26.8 hp) and 29.4 Nm (21.7 lb-ft) of torque, both at 6,500 rpm.
These numbers compare favorably against the 18.8 kW (25.2 hp) and 63 Nm (46 b-ft) peak outputs of the Kohler KDW1003 E536A, says LiquidPiston, a diesel roughly five times the physical size of the XTS-210, and over four times the weight. And the XTS design uses just two primary moving parts: a rotor and a shaft. You can see a breakdown of an older version in the video below.
VIDEO AT LINK......
So how do they work? "If you recall the Wankel," LiquidPiston co-founder and CEO Alec Shkolnik explained to us in a 2020 interview, "they have a triangular rotor inside a peanut-shaped housing. We have the opposite, a peanut-shaped rotor in a tri-lobed housing. So take everything you know about the Wankel and turn it literally inside out.
"They have a long, skinny, moving combustion chamber, we have a stationary combustion chamber that's nice and round. You can drive it to a high compression, just by making the chamber smaller. And because it's stationary, we can directly inject fuel where the Wankel could not. So those are the two key advantages of the diesel: high compression ratio and direct injection.
(Excerpt) Read more at newatlas.com ...
I bought my rotary engine RX-2 in 1972, in Houston.
We had a ‘79 RX-7. Wonderful fun and versatile little sports car. Keep it several years. We never had a single problem with it other than a dealer installed radio.
Anybody remember the Mazda rotary engines?
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Yup... I bought a ‘77 RX-7 almost brand new and still have it. I bought it off a Mazda dealer who got it right off the floor at an auto show (none was available yet at the dealers when he picked it up.) It’s currently up on blocks in my garage and one of these days, it will get completely refinished.
Nothing wound faster than my RX-7.
Not my Corvette, not my Trans Am.
But I enjoyed them all.
Powered by Dorito and fueled by salsa diesel?
Meh..........Nomad increased engine efficiency by 57% (IIRC) on the Starship Enterprise.
AND it brought Scotty back to life.
So....when you can top that............
It would appear to be Mazda, an amazing car company, for its size.
Mazda
I had the mazda MPV 1998.
Best designed family vehicle ever
The inner lobe has combustion always on one "ear" and exhaust on the other so the heat differential may be an obstacle.
It will be interesting to see how much oil it burns since the surface of the lobe is lubricated to pass each seal and then goes into combustion, burning the oil used to lubricate it. It would be comparable to having to lubricate the surface of a piston in each cycle.
It would also be interesting to see if this engine works best at a fixed speed, suitable for charging a battery pack in a hybrid car, or if it can handle acceleration and deceleration of normal driving.
I didn't see anything about using exhaust gas for a turbo or sending excess intake gas back into the engine.
.
Have ran the beans out of the RX-7’s and Z-series and everything else. Much fun, a mechanic’s perk...owned big-block Fords, too.
My RX-8 has mostly the same engine and 9000 rpm redline. Updated body and interior for more room and comfort.
Unfortunately, while the RX-8 has very good handling, it's too heavy to be as food a race car as the RX-7.
It's still a pure joy blasting around curvy roads while using only 2nd and 3rd gears.
Had several Mazda rotary powered cars. Bought a Rx-2 in 1972 or so, peppy little thing, had a tiny four barrel carb. About the same speed as small V-8 of the time. Younger brothers fried the engine somehow.
Later had a Rx-7 turbo in 1987. Fairly fast, even more so when removing the cat and adding a boost control. Great fun embarrassing Porchs of the day.
Almost bout a new 1994 Rx-7, glad i did not as they turned out to have a very short fuse and they disappeared within a few years.
On a related note, AMC intended to use a Wankel engine in the Pacer.
I am missing the exhaust cycle?
Still will require edge deals, a bugaboo of the earlier rotary.
thatsa good graphic!!
dork! lol...
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