Quote:
Originally Posted by Logic
I'm going to pretend we actually read each others posts with the intent to understand,
rather than immediately rushing to engage in some insane game of intellectual one-upmanship to satisfy a need to be considered cleverest and for the pure joy of a good argument.
ie: This reply is not actually for aerohead, as he wont read it with the intent to understand it, but for others reading this thread.
...
Leaving the placement of the catalyst after the tune-pipe and centrifuge as the last remaining problem to be solved before light and simple, fixed rpm 2-strokes might be unbanned.
Any ideas?
One does not want to waste fuel to re heat a damn catalyst..?
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I'm not sure that Aerohead disapproved of this subject. I think his point was that the legal requirements could be difficult to satisfy for new two stroke engine products in the US. I thought that the information he gave us was useful. If a new two stoke engine could meet the emission requirements it may be accepted. With the recent changes at the EPA, that might be easier. I hope we are not going to be breathing more pollution soon, but we probably will because of the large amount of fuel being used or burned up in wars. If we can clean up old two stroke engines, it would be a step in the right direction.
I do have an idea. I suggest wrapping the expansion chamber (tune-pipe) in insulation so the exhaust gas will be hot enough for the catalyst. The centrifuge may not be needed if the two stroke oil burns cleanly. I think it would be useful to add valves to the transfer and exhaust ports. They could be rotory valves so they can operate quickly. That could improve engine efficiency by delaying the opening of the exhaust port. The transfer port opening could also be delayed until after the piston reaches the bottom of the stroke to allow enough time for most of the exhaust to leave the cylinder before the new fuel mixture starts to go in. This might work better if a reed valve is added to the bottom of the transfer port and the volume of the transfer port is increased.