Also, FWIW, the speed of the flame front having to chase the piston
is not as significant as it might seem, as the gas charge is also
chasing the piston.
Bob
On 25-Feb-11, at 2:44 AM, Daniel Chisholm wrote:
For what it's worth:
preignition, piston clatter (slap), and pinging are three different
things
pinging is detonation
a fuel's octane rating is not a measure of its energy content nor
of how fast it can be made to burn. Octane rating is a measure of
a fuel's resistance to detonation. Typically (and
counterintuitively) a higher octane fuel is slower burning
burn rate is not a constant, among other things it depends on
pressure and temperature, both of which change as a piston moves
and also as a function of how much burning has already happened
--
- Daniel
Fredericton, NB Canada
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