Scuderi~Split Cycle Engine, anything to it?
Scuderi~Split Cycle Engine, anything to it?
(OP)
http:/ /www.foxne ws.com/lei sure/2012/ 04/10/scud eri-files- patent-for -split-cyc le-engine/
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.





RE: Scuderi~Split Cycle Engine, anything to it?
My question was whether the balance was right between increased complexity and advantage.
JMW
www.ViscoAnalyser.com
RE: Scuderi~Split Cycle Engine, anything to it?
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: Scuderi~Split Cycle Engine, anything to it?
Here is OK and it isn't a double post because different people posted.
Not everyone covers both forums so its justification enough to leave both running.
JMW
www.ViscoAnalyser.com
RE: Scuderi~Split Cycle Engine, anything to it?
2) Anybody equipped with a copy of Heywood and a brain can identify the likely reasons why its performance (in a general sense) is likely to be ho hum. There are some offsetting advantages, maybe there is some magic there. They have sternly resisted the temptation to publish hard numbers for efficiency and bsfc and power.
3) They have a lot of lawyers and money
Nuff said.
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Scuderi~Split Cycle Engine, anything to it?
1) why is the charging cylinder the same displacement as the combustion cylinder?
2) has anybody got a quick estimate of the losses associated with the redundant compression/transfer/expansion portion of this engine's cycle?
Incidentally underneath the hood there are a lot of similarities with our old friend the Bourke engine, and really with any crankcase charged two stroke.
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Scuderi~Split Cycle Engine, anything to it?
I suspect the primary reason for not exploring simple alternatives is that every configuration change becomes an excuse for the Research Institute that's been eating their money to restart the simulation build effort from scratch.
I haven't been able to get a straight answer about how many actual engines exist, or ever existed. The published claims seem to be all based on simulations.
Mike Halloran
Pembroke Pines, FL, USA
RE: Scuderi~Split Cycle Engine, anything to it?
JMW
www.ViscoAnalyser.com
RE: Scuderi~Split Cycle Engine, anything to it?
JMW
www.ViscoAnalyser.com
RE: Scuderi~Split Cycle Engine, anything to it?
RE: Scuderi~Split Cycle Engine, anything to it?
Sorry, I'm not from the texting generation.
JMW
www.ViscoAnalyser.com
RE: Scuderi~Split Cycle Engine, anything to it?
- Steve
RE: Scuderi~Split Cycle Engine, anything to it?
RE: Scuderi~Split Cycle Engine, anything to it?
JMW
www.ViscoAnalyser.com
RE: Scuderi~Split Cycle Engine, anything to it?
http://en.
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Scuderi~Split Cycle Engine, anything to it?
RE: Scuderi~Split Cycle Engine, anything to it?
This report made in 1944 mentions BSFC as an acronym for Brake Specific Fuel Consumption. I think 1944 is well before the advent of texting.
I also remember using # as a symbol for number going back to mainframe computer days like the 1970s.
Regards
Pat
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RE: Scuderi~Split Cycle Engine, anything to it?
JMW
www.ViscoAnalyser.com
RE: Scuderi~Split Cycle Engine, anything to it?
However, it has only 1/2 the intake ports and valves and 1/2 the exhaust ports and valves and it looks like the durations of the intake and exhaust events are shorter than they can be in a 4-stroke. The intermediate port and valves are extra restrictions in the chain. It appears to me that the performance of the 2 coupled cylinders would have to be much poorer than for 2 cylinders of a 4-stroke. The BSFC should be higher also because of the added pumping losses in the intermediate port and transfer problems.
The conflict between induction of the pre-compressed charge into the power cylinder and the compression stroke at the same time and the timing of the spark with the induction port still open looks restrictive for induction, compression and spark timing, but only experimentation can tell if or how much of a problem this is.
Is this right? What am I missing?
BTW, the second intermediate valve won't seal well opening to the outside of the chamber. Why is that necessary?
RE: Scuderi~Split Cycle Engine, anything to it?
Elegantly and politely put . basicly this design in its present form has no future . Why not do away with the charging cylinder and add or substitute a turbocharged intercooled positive displacement supercharger (roots), The result would be better.
A tidy mind not intelligent as it ignors the random opportunities of total chaos. Thats my excuse anyway
Malbeare
www.sixstroke.com
RE: Scuderi~Split Cycle Engine, anything to it?
Update. They are now posting BSFC numbers on their website. Looks like 233gr/Kwh with turbocharger. Malbeare I agree with your thinking. Looks like someone within the organization is starting to get it.------Phil
RE: Scuderi~Split Cycle Engine, anything to it?
If you look carefully at those graphs they are simulations, not tests.
233 is a bit hohum, but I suppose you could argue it is good for a two stroke on gasoline, but then as two strokes go it is more of a 4 stroke.
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376 http://eng-tips.com/market.cfm?
RE: Scuderi~Split Cycle Engine, anything to it?