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No! The exhaust on a 4 stroke has a very limited effect on the engines economy or performance. Whereas a 2 stroke's expansion chamber exhaust has an enormous effect on the engine's performance & economy.
It seems as if the friction is most important however it is mostly about newton times distance, make a sheet showing the total area (integral) of the newton meter curves for each engine resulting in a power advantage.
It's a good idea, but don't we want to leave the byproduct of burning something behind and also leave the conversions to electron current behind to comprehend and use a much more direct way of energy conversion?
I wonder weather if the two stroke engine is more suitable for a vehicle that's supposed to be destroyed after reaching a destination. I think 2 stroke engine contains less parts and less cost ?
Mazda needs to use heavier valve springs to eliminate valve float valve float keeps the valves open which will defeat the whole purpose of this new motor love the design and I really hope Mazda will still keep away from the cvt transmission other then valve float Mazda came up with a very great design
Energy losses. The belt will slip especially under high acceleration or torque. Before the power reaches the wheel there's also the reduction gears which is why you need to replace gear oil in a scooter but not other types of motorcycles. Any type of power transference will have power losses. Manuals have transmission gear towards an output shaft with a chain drive all of which is bathed in oil except for the chain drive and sprockets but that still has lubricants
In my humble opinion, the piston did not need to rotate with the connecting rods, it could have a bearing in which the connecting rods were on a platform and there would be less wear on the piston and cylinder!
No data on power (KW or PS) is provided, nor for T in Nm, nor the displacement, nor at what rpm such performance data were reached. To be able to calculate the mean effective pressure would provide a measure of the ratio of converting fuel to mechanical power. Why is that not provided? A Go-kart running at x km per hour is not a useful number. I agree that the friction will be far lower but not to make up for 30% higher power or 30% higher efficiency, The gentlemen did so much, but he never measured the power output or rpm? Strange.
I imagine that the larger the piston diameter and the shorter the stroke, the more efficient the engine will be, because the gas dynamics will be better directed. Another aspect that should be tested would be the replacement of camshafts with cames with rotary cylindrical valves, which would greatly increase the efficiency of the system.
Seems like, although you're recapturing some of the heat energy with water, running cooler would have a negative impact on the first power stroke. I guess it works though since Porsche is doing it.
The water would make the engine cool down and heat up repeatedly making the metal dilate and shrink down a couple times in a second, so I suppose structural rigidity is a huge challenge as well
Very cool from an engineering standpoint. I do think that it's going to be extremely tough to make something like this power-dense enough to make any sense. I have to wonder about onboard processes for purifying or distilling water.
Yes the citroen 2 cv is the best engine design and engineer in the world! It's a big shame this great engine wasn't made to a 1.1 size to be fitted into the citroen visa as it was a heavier car, plus being a bigger engine and maybe have a 5 speed box would be amazing on the motorway, and going up very steep hills and mountains, its an engine and car that fits any where in the world, especially the citroen visa!!!
