So I have a question...From what little I know of rotary engines and diesel engines I am wondering why they haven't made a rotary diesel.
1. diesel engines operate at higher temperatures to try ro burn the excess fuel...rotary engines already operate at a high temp.
2. rotary engines require lubrication in the combustion chamber...diesel fuel has more "oil" in it than gasoline...solves a problem right?
Also diesel engines have a lot of torque and low horsepower and the rotary is the opposite....
I am admittedly not an engineer I am just curious...

 

there are diesel rotaries. It's just that generally diesel's are for commerical applications and noone wanted to really develop a whole new engine and all around it. Licensing fees for rotary tech back in the 70's we pretty outrageous too.

 

Diesel burns slowly, that is why there is so much low down torque. If you tried winding out a diesel engine to 9,000 rpms... LoL It would be pretty funny.

Seriously though, it would be a purely low rpm machine, and it's piston counterparts would be better suited I think.

 

so if 'they' were to continue developing a deisel rotary for everyday drivers, would it work more efficiently or whatever like kantons points 1 and 2 suggest?

 

I'd like to see one running in our 1.3L. I wonder if our chambers could deal with the compression needed. I think pistons are better suited to the diesel cycle.

 

yeah I'm not so sure the internal gearing would be ideal for a rotary, you'd still have to wind it out more than its piston counterparts.

 

Rolls Royce and Yanmar Diesel worked on Wankel-Diesel engines:
http://www.der-wankelmotor.de/Motore...lls-royce.html

 

^what do they say on that website? How much power did it make...spec's etc?

 

345HP at 4500 RPM, :P Can't you read numbers?

 

That's in the R6 1972 version

 

Hy,

I've been reading on this forum a while now... and here it is. The first post...

As you could see on this website, the total horsepower reached in a dieselwankel is 350 bhp!? And this is without any new dieseltechnology like 3th generation common rail. It's kind of a big engine though and it's the first time I see that the two combustion chambers (or how do you call 'em in rotaries) are different in size. The first is quite big: 3250 cc. Seems like a lot for a rotary.

Imagine the possibilities: nowadays diesle engines reach 160 bhp for a 2.0 liter... Probably there a good reason why they aren't developing this further. Perhaps because of the design of a rotary the high compression rate is hard to reach?

 

The combustion chamber shape of a rotary makes diesel difficult.

 

Me no lern good....

I didn't see those numbers, but intersting regradless.

 

im reading the page translated. am i understandign this correctly? it say stage one chambe rvolume 3250 and stage 2 chamber volume 1265. in the chart at the bottom it says 2 x (3250 +1265)

that suggests to me that they may be using first stage as a compressor then handing it off to the smaller stage for final compression / combustion.


is that right?

 

That's how I'd understand it too, yes. At least that's how that page explains it (and I do speak German).

 

You guys don't need a translation. You just need to find someone with a book with all the info on it who can scan it!

 

very, very intresting

thanks!

 

Wonder how much torque those were putting out. Can you imagine a 6.4 liter Rotary with 700hp in a Ford Superduty! Wonder why Mazda never expanded those ideas? It is all useless now, the way California is going, all diesels will be outlawed next year anyway.

 

thanks. thats preetty cool

 

the L shaped seal that allows the gas to get behind and seal it tighter is ingenious. the whole thing is just brilliant

 

The only problem is that Rolls would put it in a 7000 lbs car.

 

Thanks RG...that was some good reading!

 

A thing about that...I know their engine was a high compression engine, but could the L shaped seal but good for our rotary?

 

Any idea on torque? This is a cool design.

 

I'm gonna resurect this thread.. I've been considering tinkering with a diesel rotary and this picture piqued my interest.. is this a 13b rotary I spy?

http://www.smartplugs.com/images/engines/rotary3.jpg



I've been debating running a gas-diesel mix first. maybe 5-10% to start and going higher.