"mark krawczuk" wrote in message
...
Detonation is all of the fuel burning at once(explosion). A proper flame
path will happen relatively slowly to push the piston(burn).
tell me what is the change over point at which a "slow burn" turns to a
explosion.
u want the fuel to burn slow , so teh engine runs slower ?

you are incorrect , dentonation is the IGNITING of fuel at the wrong
time
.


hmmm of course its a explosion, i`ll put u in a petrol vapour filled room
with a sparkplug connected up to a engine , via a long plug lead, then
i`ll
crank the engine over KABOOM !!!!of course its gonna explode.



"Captain Midnight" wrote in message
...
"Homer J Simpson" wrote in message
news:_DJJh.41829$lY6.17214@edtnps90...

"Captain Midnight" wrote in message
...

Their is no explosion in a properly operating internal combustion
engine.

Sure there is. But you want it at the correct time in the cycle.
Knocking
is
caused by misfiring.


Detonation is all of the fuel burning at once(explosion). A proper flame
path will happen relatively slowly to push the piston(burn). The
beginning
of the burn is timed to push the piston when the crank is in the proper
position. How long the burn lasts and it's timing is dependent on engine
design and application. If an explosion was acceptable there'd be no
need
for high octane fuel. Apparently you've never seen a piston with a hole
in
the crown. It's like the difference of flipping a light switch with your
finger or hitting it with a hammer.

Pinging is hot spots in the combustion chamber causing self ignition at
the
wrong time. The extra heat from this can cause detonation though.


Seems you are also incapable of understanding the difference between burning
and an explosion too.