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Will Split-Cycle Engine Compete With EV Powertrains?
9/23/2011

One cylinder of Scuderi's split-cycle engine performs intake and compression, while the other handles power and exhaust. The engine completes all four strokes in one crankshaft revolution. (Figure courtesy of Scuderi Group.)
One cylinder of Scuderi's split-cycle engine performs intake and compression, while the other handles power and exhaust. The engine completes all four strokes in one crankshaft revolution. (Figure courtesy of Scuderi Group.)

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Ivan Kirkpatrick
User Rank
Platinum
Very Likely
Ivan Kirkpatrick   9/23/2011 11:25:07 AM
NO RATINGS
I think this is going to be a good technology to watch.  With the government mandating higher fuel efficiencies and "good enough" battery technology still a few years away, this might be the technology that gets us there.

Proving this works in high output engines will be an important factor.  It does have some interesting characteristics, for one, the hot side of the engine stays hot and the cool side does not heat up too much.  This is in contrast to the Otto cycle characteristics.  

I would be very curious as to just why the retardation of the spark helps so much in this design compared to the Otto cycle.  And another obvious question to me is if the split cycle is amenable to creating a split Diesel cycle?  Would there be any benefits in that?

Beth Stackpole
User Rank
Blogger
Re: Very Likely
Beth Stackpole   9/23/2011 12:14:11 PM
NO RATINGS
Seems to me that any kind of technology that has the potential to advance the cause of fuel efficiency is to be taken seriously. Glad to hear that analyst groups and automotive OEMs have this on their radar screens even if it's some time out before we see the actual technology in production vehicles.

William K.
User Rank
Platinum
Split cycle engine= two stroke?
William K.   9/23/2011 10:13:52 PM
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This sounds a lot like our two stroke engine, except for being more complicated and having six valves. Clearly it allows much more variation in timing of all the several parameters like when to start the air intake  portion and when to inject the fuel. Depending on the timing requirements, the same functions could possibly be delivered by a standard two-stroke engine, even better if it had direct fuel injection. Such an engine might possibly also fare better in emissions testing, although efficiency and low emissions seldom peak at the same time. But as the split stroke is compared to a two stroke, it is clear that they are similar.

TJ McDermott
User Rank
Blogger
Re: Very Likely
TJ McDermott   9/24/2011 8:28:51 PM
NO RATINGS
This is likely to be what gets the automakers to the 54 mpg 2025 limit.  If automakers are foreward thinking enough, they can trumpet they got there 10 years early, too.

Still, this takes away from the goal of weaning off fossil fuels.  The innovation that DOES make a storage battery approach the power density of liquid fuels is what is needed.

SCUDERI
User Rank
Iron
Shaking the Automotive Industry.
SCUDERI   9/25/2011 4:41:26 PM
NO RATINGS
Hello to all.  Scuderiengine.com  answers many of your questions.  THIS  innovative engine technology will definitely shange the engine world (ICE) forever.  Lets NOT be "Car-Centric" here.   There are ICE  Internal Combustion Engines in many other applications and not only the automobile.  Lawnmowers, tractors, big generators, boat engines (large + small) basicly ANY  ICE with piston technology.  As a former Rubber+ Plastics engineer and a youthful "Motor-head",,,,  I knew this project was a winner within 30 minutes of a complete inspection of their technologies and developments...

Go to the web-site.   This concept  "ATDC" is not only central but its been their focus for many years; at Team Scudei.    I immediately invested upon being offered the opportunity to get on board with this  "Gamechanger" ..

In my opinion....look at the progress and then the depth and gameplan that Scuderi  employs.  They are asked...they answer beyond expectations and then they engineer beyond expectations.   Right now...at 65 mpg proven via simulation,,,there is talk in the 80 mpg range and a longer view of 100 mpg.  Will they breach these barriers?  I do not know; but they have repeatedly pushed foward beyond their expectations many times before.

Right now....I await the announcement of our 1st leassee of the technology and I am preparing for the push to "Go Public "  as Sal Scuderi has stated may times in the past; as the GOAL of Scuderi Motors.    The time has come for a real world demonstration.  The significant strides foward can no-longer be kept in the closet.  It's time to show the public and get ready for the stampede !!!!

GO SCUDERI !!!

                                                                                              Clifford White  :))

 

 

vandamme
User Rank
Silver
Re: Shaking the Automotive Industry.
vandamme   9/26/2011 9:26:59 AM
"..at 65 mpg proven via simulation,,,there is talk in the 80 mpg range and a longer view of 100 mpg."

In other words, they haven't built anything that performs, but the investors are dreaming big dreams of selling out and the PR machine is cranked up to 11.

wlawson
User Rank
Iron
Re: Shaking the Automotive Industry.
wlawson   9/26/2011 10:29:11 AM
Having a long history of watching these various technologies I am very skeptical until they actually build one and run it on a dyno or an instrumented vehicle.  They need to build it and test it, otherwise it is just another idea that is good on paper but will never materialize.  The world is full of failed attemps.  like the ECOmotor.  So far no one has been able to violate the laws of thermodynamics

Currently the most efficient practical engines are the direct injected European Diesels at over 30% actual dyno efficiency. We cannot use these in the US becaus of the high combustion pressures and temperatures (the key to efficiency) causes too much NOx

RNDDUDE
User Rank
Platinum
Re: Very Likely
RNDDUDE   9/26/2011 10:31:01 AM
Isn't this essentially an internal supercharger? Seems a traditional supercharger would have less parasitic loss, no fricton from extra pistons and valve train, and would accomplish exactly the same thing....

Ivan Kirkpatrick
User Rank
Platinum
Fossil Fuels are plentiful
Ivan Kirkpatrick   9/26/2011 10:43:47 AM
I suspect that we will be using fossil fuels a lot longer than many people suspect or desire.  Reducing emissions is a laudable goal but the world is going to use up all the fossil fuel we can no matter what the green climate folks would like to see happen.

I would really like to see the EV replace ICE powered ones but the target to beat is still the ICE and the availability of fossile fuels is still good enough.  How good and for how long is difficult to say but we keep finding more and figuring out how to get it in a relatively cost effective manner.  Oil, coal, natural gas, methane hydrates, we are going to use them all.

vandamme
User Rank
Silver
Re: Shaking the Automotive Industry.
vandamme   9/26/2011 11:03:59 AM
"We cannot use these in the US becaus of the high combustion pressures and temperatures (the key to efficiency) causes too much NOx"


So, it's purely political? We can fix that.

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