Ladies and Gentlemen,
In internal combustion engines you need high RPMs so that the engine is flexible... On the other hand I have the feeling that 5,000 - 6,000 RPMs are crazy and nothing but a huge waste of fuel - a 10th of the RPMs would be enough for the same output... But you need the high RPMs for flexibility...
Well, it doesn't sound good literally when there is no cumbustion in a cylinder (on the other hand you can also shut down whole cylinder banks in some engines)... What if you reduced the number of fuel injections in all cylinders when you reached a high RPM? The shut-down cylinders would only carry air to the turbo-charger(s) so the efficiency of the remaining combustions would be very good... I think such an engine management could sound even at high RPMs like "the whispering of the wind": much air and few combustions - "only quieter..."
By the way you could probably reduce both the fuel consumption and the sound level of very sportive engines, too (7,000 - 8,000 RPMs) the same way...
Best wishes, Joseph de la Mikula and Team
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