Posted by jdemaris on January 01, 2009 at 11:17:49 from (67.142.130.22):
In Reply to: Re: Timing Question. posted by jose bagge on January 01, 2009 at 10:59:21:
The word "timing" is useless if not put into specific context. An internal combustion engine requires the proper timing of many things.
If you don't buy gas in "time" the engine dies.
If your engine overheats and you don't turn it off in "time", you lose your engine.
If the engine blows to pieces, it might be "time" to buy a new one.
If a mechanic says your engine is not running correctly because it's out of "time" what does that mean? Not much without more specificity.
If you are an engine-design engineer and wish to convey proper valve timing - it has to be expressed in direct relation to something else.
If you wish to express ignition timing - you need to specify ignition where? - at the source or at the target. Not so important with spark-ignition travelling at the speed of light, but VERY important with compression-igntion with liquid fuel travelling slowly though injector lines or passages. Ignition timing also needs to be expressed in relation to what other part of the engine?
So, I ask . . . if to you - the crank is the "legs" of the engine, and the "cam" the brain - what is the piston?
Your "brain" idea has some big problems - especially since many engines don't have cams or valves.
This is getting a little silly. Maybe I ought to fire up my "brainless" chainsaw and go cut some wood. Amazing it runs at all without that central control center.
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