Quote:
Originally Posted by UnknownJinX
As for emission, I wonder if Mazda has figured out that sweet spot for the amount of oil to inject to keep the seals lubricated while keeping the emissions low. Again, it's a compromise between 4-stroke oil and 2-stroke oil. If they make the oil pan big enough and go with the same 4-stroke oil injection that has been used historically, the engine can potentially not need any oil added between oil changes. Actually, my RX-8's oil injection is electronically controlled and it doesn't consume much oil on highway trips(constant RPM and load).
It's true that the timing is static on a rotary engine. No valves in a rotary engine mean fewer moving parts and high revs, but the timing cannot be optimized for all RPM, unfortunately. However, since this generator runs at a set load and RPM, this will also become a non-issue. Figure out the best intake and exhaust port positions for that set RPM and you are good to go.
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actually when i said dwell i was referring to piston dwell time. Which promotes a fuller burn and higher thermal efficiency.
There's no dwell in a rotary since the rotor is constantly spinning. During combustion, the charge mixture at the trailing side of the rotor is pretty much thrown out the tailpipe.
Hence the trailing plug. But it doesn't help much.
One of the reasons for the multiple cats and high hc.
Maybe they'll implement hcci. That would probably remedy it. Or maybe laser ignition.