Quote:
|
Originally Posted by Dean
Detonation is caused by the air fuel mixture spontaneously combusting due to temperature, pressure, and possible one or more ignition sources such as hot valve or other metal edge, hot exhaust particles still in the chamber, etc. But the ignition source is not required. That is how a diesel works without spark plugs. Continuious detonation.
|
That's right. But the *dangerous* pressures... i.e. the engine breaking pressures... come from the improperly timed combustion pressure. Basically, the piston's in the compression stroke, and the cylinder is too hot, allowing the compressed gasses to start to burn w/o spark. The combustion then occurs well before the piston reaches TDC, which means you've got a piston going up and an explosion going down... welcome to broken motor land.
Quote:
|
Originally Posted by Dean
And you can post all the pictures of burned buses you want, Oxygen is not combustable. Put a spark plug in a container of pure oxygen, and generate a spark, and nothing will happen. No explosion, no flame other than the spark itself. Same thing happens with a fuel. a container of pure hydrogen will not burn either.
|
Let me get this straight. You're saying oxygen "isn't combustable"? And you say you can't have combustion w/o an oxidizer? So which is it? Does the word "combust" only apply to the fuel in the reaction? The oxidizer is just along for the ride? 'Course, if I combust hyrogen and oxygen, I get water. If I then use electrolisis to split that water back up, hey look there's my hydrogen and oxygen... I guess I never really "burned" anything, did I? I better not apply the word "combustion" to anything!
And if you don't think hydrogen can burn by itself...
They call it fission and fusion... it's not "combustion", but it's certainly burning.
(Three things: Never get involved in a land war in Asia. Never go in against a Sicilian, when death is on the line. And don't waste your time trying to out symanticize sperry.
)