Do More Strokes Mean Better THERMAL EFFICIENCY?!! - 5 STROKE ENGINE
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- Опубліковано 4 гру 2023
- Does More Strokes Mean Better Fuel Efficiency??! | 5 STROKE ENGINE 3 (100003)
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#5STROKE #4stroke - Авто та транспорт
This was already used with steam engines where the steam was allowed to partially expand and then was routed to a lager cylinder with lower pressure.
The design is genius, but not for the reason people think. There are a lot of ways you can extract more energy from fuel. And I do mean a LOT of ways. If you were so motivated, I would not be surprised if a highschool student could extract 70% efficiency out of a motor or more. The problem is the cost and packaging. You can add a series of turbines on the engine exhaust coupled to a generator and get a better efficiency rating. You could go one step further and use the water you would inject into the exhaust as coolant for the engine. This would preheat your water temp to near boiling so that you minimize any cooling effect which would again improve efficiency. You can go crazy, but it ends up costing a ton of money, adds a lot of weight, reduces reliability, and the system may not even fit into your application.
The genius of this design is that it is just an engine. There is no extra cost or packaging issues. The power is more than you realize because you get a lot of low end torque out of the deal. On paper, this engine seems kinda pointless, but in the real world it would kick butt as a daily driver motor.
This would be great on a diesel used in stationary applications like pumps and generators
the goal here is NOT to make more power but to extract more energy from the same amount of fuel
It is related to the triple expansion steam engines used in old ships.
Biggest problem isnt complexity but exhaust valve temperature.
The final exhaust valves that open double time do not have enough seating time to cool so they will burn.
The final exhaust valves should open single time as the exhaust volume is lower due to cooling and you do not need to open both of them.
This concept will work even better on a 3 rotor wankel engine because rotarys have more wasted exhaust energy than piston engine.
For reducing Exhaust Valve Temperatures, there are some classical approaches: Sodium cooled valves; Single Sleeve Valves, either Burt-McCollum or Piccard-Pictet; Spool Valves, as Lotus, Itala; Doughnut Valves, as Coates; Rotary Disc valves, as Reynolds, Felix Wankel, and many more...
the second cylinder does cool down the gas by expanding it, and the individual valves per side do in fact take turns opening
@@manitoba-op4jx Perhaps, but the gas enters expansion chamber at high temperature, and through the valves
this but I6, V6 or V12 would be epic
Brake mean effective pressure is very good metric to compare engines. This engine have bmep of 2.98 at peak torque, and for low boost turbocharged engine this is VERY GOOD. Fyi, conventional turbo engines can achieve same bmep with tune, but way past efficiency zone. In short - this "5-stroke" is impressively efficient
cool
It's gonna have crazy bad pumping losses
Unless I am missing something, it has about the same pumping loss as a 4 cylinder motor. Pumping losses occur when you try to move air from one part of the crank case to the other. As long as the internal volume of the crank case remains mostly constant your pumping losses are low. Im guessing the middle piston is sized so that the volume of air it can displace is about equal to the volume of air the 2 smaller pistons can displace, so Im not seeing how you would have any better or worse pumping losses than any other standard 4 banger.
Why any motor company doesn't make 5 stroke engine?
Nikolaus August Otto himself built an identical engine in 1879, the customer returned it for poor performance.
Eisenhuth Horseless Vehicle co. in Connecticut, built a car with such an engine, Patent US640890, 1900. One of these cars was in a Museum, later the exhibition content was spread.
Even If Double or Triple Expansion worked well in Steam Machines, the 'Titanic' had some of it, case was not same with Internal Combustion Engines.
Two Spanish Patents ES0156621, Jimeno-Cataneo, 1942; and ES0433850, Ubierna-Laciana, 1975, describe exactly same engine.
Then came Gerhard Schmitz, Patent US 2002/0050253, driving attention of ilmor, and an EU fellowship for Burgundy University to study it.
T Suzuki, in 'The romance of engines', SAE, points the Otto invention, and thus its remakes, have inherent drawbacks.
It must be the 'Patent Office's Elf' playing with inventors.
Calm
This is half of Mazda Skyactiv petrol engine, its work whitout spark plugs. Mazda is smarter than this videos engine.
Sorry for my english - proceeds to speak better than 80% of the population
Scam...