Prevention of Advanecement of Engine Performance

Perhaps it was the same thing that prevented blood from flowing to your brain.

Merry Christmas.

The analysis is misunderstood by those who use it and is mainly used to excuse poor results of very expensive experiments by grants recipients, who also wrongly interpret the second law of thermodynamics.

Max Planck, the father of thermodynamics introduced Entropy as a tool for calculations. He also re-instated the second law of thermodynamics originally stated by Clausius. Unfortunately Planck had stopped to work with engines when was attacked by underachievers of his time and got interested by more attractive and intellectually challenging field of theoretical physics. Those who continued have not much of intellectual power and attacked people like Sultzer who has double the efficiency of two stroke diesel engine, by introducing better expansion of exhausts. He demonstrated in 1933 his diesel engine with prove efficiency of 46.5%, but his engine is only used as marine ship propulsion.

It is obvious that wrong is winning always! Is it that oil business is behind keeping efficiency of diesel engine low?

"He demonstrated in 1933 his diesel engine".

"His" diesel engine was designed by Rudolph Diesel.

Sulzer, not Sultzer didn't design anything. He bought the rights from Diesel.

Don't distort the facts.

To the extent that that's true, it would be because it's against the Laws of the Universe, some of which can be studied in thermodynamics class.

Some of this comes down to nothing more than politics. What an IC engine can achieve for maximum efficiency is now put aside for supposedly cleaner exhaust requirements made by politicians not scientists.

There is little point in arguing about a 35 - 45% peak efficiency limit for IC engines when the emissions compliance requirements choke them off at 20 - 25% or less real life working efficiency levels.

I for one don't care about how theoretically efficient my engine can be rather what I care about is how much fuel I pay for at the pumps. If politics make my engine half as efficient as it can be I want that politically placed mechanical crap removed and replaced with parts that can get me closer to that theoretical limit.

Actually clean engine is more efficient than polluting. Proved by inventor of gun-engine the efficiency of which is close to Carnot engine.

Would that be the same theoretical gun engine that got you laughed right out of CR4 a while back because its unbuildable or because the purported physics and related concepts behind its operation don't fit into this reality?

If you want to fantasize about magical mystery engines that use para physics to work go hang out with DAS.

Why the entropy analysis prevented improvements of efficiency in ic engines?

This is like asking: "Why does gasoline prevent engines from running?" "The" (??) entropy analysis has not prevented improvements.

Entropy analyses contribute to the improvement of efficiency in engines. Aside from non emission-controlled engines, where development has been stagnant for the last 40 years (with e.g., lawn mower engine efficiency not having changed at all in meaningful ways) most engines have improved in efficiency. Direct injection marine 2 stroke engines emit 1/10th the unburned hydrocarbons and burn 30% less fuel per horsepower-hour than their pre emission-controlled equivalents.

If you really hold the strange belief that entropy analysis somehow prevents engine improvements, and want to spread that belief, then you would have to develop a logical narrative for how that could be the case.