Quote:
Originally Posted by cmac2012
Not sure if I follow all of that. Is that a regular cam shaft, driven by the crankshaft? I can see the advantage to this though, I think. I'm guessing that setup closes the valves faster than the springs would, which I gather can be a problem at really high RPMs. Maybe drains less hp to move the valves as well.
However, I can't tell what keeps the valve closed.
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MB in the early 50s while racing perfected the Ducati system called desmo tronic - the cam opens and closes the valve in and while its rotating , the compression of the engine closses the valve - it also doubles as a compression release letting of just enough bypass while cranking - it is very good at making torque and the system reduces the speed at which it makes torque reason ducati has won 10 world championships - it does not use valve spring at all -- jz