Wankel Engine

[Gabriel Haidamak]

Hello, my name is Gabriel.

I'm a engineering student. I also have a cousin that is just a huge fan of drag racing.
The joint of this two fact, is that because of my cousin's talkings, i start to search about the Wankel Engine.
This is a super eficient engine, if you look at the point that in just one turn of the axle, it performs 3 Otto cycles.
The big problem of this engine, is its premature wear of the engine gaskets and excess internal lubrication. The last one problem makes it burn oil and its carbon emission is too high.
I really want to solve one of this problems and i'd like do debate with people about possibilities.
If anyone there knows some manual about wankel engines, or have informations about it, please, answer it.
Thank You.

 

[GregLocock]

"I'm a engineering student"
"This is a super eficient engine"

You are going to have trouble with engineering if you think a Wankel is super efficient. In fact, for a four stroke spark ignition engine, it is pretty lousy efficiency wise. The reason is that the combustion chamber has a high ratio of surface area to volume, and it has poor emissions due to the crevice effect.

I suggest you learn a lot more about engines before 'solving' the Wankel engine.



Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[SWComposites]

yeah, start here:

https://en.wikipedia.org/wiki/Wankel_engine

then ponder how Mazda and other engineering teams have spent many decades trying to improve the Wankel engine.

 

[fel3]

From 1976 to 1989, I owned a 1973 4-door, 4-speed, Mazda RX-2. I got it from my dad when he bought a pickup. The Mazda was a lot of fun to drive: strong engine for its size, decent and decently sized interior for a small car, poor handling (but not worse than many other cars of its era), etc. Of the dozen or so cars my wife and I have owned over the years, this was the car she found easiest to sleep in on long road trips.

BUT efficient? NO. In town I averaged about 14 mpg (the occasional street race didn't help) and the best I ever got on the freeway was about 22 mpg. IIRC, equivalent four-bangers (though with less than the Mazda's 120 hp) were getting more than 20 mpg in town and around 30 mpg on the freeway.

The rotary's advantages are power to weight ratio and smooth operation. However, piston engines are much smoother than they used to be and some of the high-end ones have very high power to weight ratios themselves and piston engines in the same class as Mazda's rotaries typically have higher torque.

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"Is it the only lesson of history that mankind is unteachable?"
--Winston S. Churchill