gruntguru wrote: ↑
Sun Nov 17, 2019 11:38 pm
https://link.springer.com/article/10.10 ... 016-0107-9
Feliks wrote: ↑
Sun Nov 17, 2019 8:55 pm
Well, it's not like you are trying to describe it .. This is where you came to the specialist for cams ...
firstly, both speed and acceleration increase with revolutions also .. and all inertial forces in this mechanism turn into friction, because they increase, but already the square of revolutions .. So the amount of energy to drive the mechanism increases with the square, because you do not eliminate friction .. And the skin increases with the square, it is unfortunately also energy, although you wish otherwise ... (and not only you ) ..
Extract (Page 11.)
You are entitled to disagree with published peer reviewed articles and the data gathered from actual testing, but don't expect anyone to agree with you unless you post some ACTUAL DATA that supports your <>
<edited for language>
This is not just my theory ... it is a general theory that has always been in mechanics ... which should be known ...
This colorful graph, made by ignorant people, does not exaggerate what the engine has, the nice green color "describes" its need for energy in terms of revolutions ..
So, let it be, desmodronic timing, which has no springs at all ..
The demand for energy to drive such a timing is definitely in line with the square of revolutions ... at which it works ... not only such a timing, but every slide timing, also needs energy and it also increases with the square of revolutions, according to general mechanical theory. .
So for 1 we will take 1000 RPM and for 6 6000 RPM, the increase in energy in this range will be ... (1) squared, i.e. = 1, and, (6) squared, i.e. = 36 .. so this green bar on the right it should be 36 times wider
.. but it is the same, and you can see that it is only the pious wishes of the illustrator sa, and not real values. We can now assume that instead of a closing cam, in normal popular timing, it is replaced by a spring that thunders energy earlier when it is pressed, then close the valve. And not driving the cam, which at high speed barely touches, and sometimes breaks away from it, because the energy as it is available is too small to close the valve. But on the basis of such unreliable charts, new adepts of mechanical art learn, and even after 100 years of experience they still produce such camshafts,
Here is a photo I took with Maciek, who thanks to this he perfectly adds to his retirement in his workshop, regenerating such camshafts from Audi V6.
Well, well, even big companies are cheating, which was detected in terms of their data regarding the pollutants they emit ... (by the way my engine does not produce them, because the elements in the combustion chamber do not have a higher temperature than 350 degrees Celsius and NOx is not generated, similarly to engines with opposing pistons)
So on about people coloring pictures nicely with the help of their preschoolers, discussing makes no sense.
Anyway, the most powerful bomber engine during World War II was a springless valve, such a Hercules engine ...