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Chainsaw
4 stroke chainsaw is it in the future?
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<blockquote data-quote="CTYank" data-source="post: 2817045" data-attributes="member: 53405"><p>There are a couple of things that can keep 2-strokes' emissions under the limit (in no particular order):</p><p>1) stratified charge</p><p>2) catalytic converter (unless folks insist on ripping them out)</p><p>3) electronically controlled direct fuel injection (could make stratified charge redundant)</p><p>4) rotary valves (a la Rotax) for intake (and exhaust?) would get you past the unwanted symmetry relative to piston motion, of opening.</p><p>5) metered oil injection (as in outboards and Mazda Wankel cyl lube)</p><p></p><p>Then there were diesel chainsaws, like the norwegian Comet.</p></blockquote><p></p>
[QUOTE="CTYank, post: 2817045, member: 53405"] There are a couple of things that can keep 2-strokes' emissions under the limit (in no particular order): 1) stratified charge 2) catalytic converter (unless folks insist on ripping them out) 3) electronically controlled direct fuel injection (could make stratified charge redundant) 4) rotary valves (a la Rotax) for intake (and exhaust?) would get you past the unwanted symmetry relative to piston motion, of opening. 5) metered oil injection (as in outboards and Mazda Wankel cyl lube) Then there were diesel chainsaws, like the norwegian Comet. [/QUOTE]
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