Really though, I just enjoy science, physics, and have thought of a similar idea before. After doing 10 minutes of research, learned that valves like this one allow a LOT of backflow, and only "increases resistance" to the backflow, never stopping it, which is not what you want.
That is also my first impression. It looks like it function parallels how a labyrinth seal functions.
My curse is I am an engineer. Older engineers are often labeled as closed minded and critical of new ideas. Engineers are trained to pursue ideas that are supported by physics and the other disciplines of science as they pertain to the task or device that we are trying to design, or improve. We are trained to find flaws in everything we do and we see flaws in everything around us that science can be applied too. Because of this we are labeled as being critical. This training causes us not to pursue ideas not supported my science or projects that seem closely related to other failed projects or ideas that we have personally experienced or seen others experience. Many of my customers, guys on the forums and some younger enthusiastic engineers often see me as closed minded to ideas that they consider to be new or revolutionary. As I grow older and accumulate experience in my field, I have seen and been in involved in more failed projects and designs than I would care to admit. I try diligently to avoid making the same mistake twice and also try diligently to warn others of not making the same painful and expensive mistakes I have personally made. Some called it closed mindedness and critical, I just call it experience.
A two stroke engine needs some type of valve at low RPM that allows the crankcase to pump efficiently at various throttle positions and various RPMs.
With the proper intake tract dimensions a two stroke will run at high RPM with the reed petals held wide open.
The 24/7 type of reed valves have been undergoing development in the back rooms of engine companies for a number of years. The 24/7 reed has petals and functions like a conventional reed valve at the lower RPMs. At a predetermined RPM when the inertia in the intake tract is sufficiently high the reed petals move out of the way and we have an unobstructive intake port that is open 24/7.
Over the years I have experienced a lot of broken reed petals on two stroke engines. These engines with a missing petal or hole in a reed petal will usually start and idle because the area under the closed carb slide has a smaller area than the hole in the reed petal. The engine will die when the throttle is opened because the crankcase stops pumping air into the engine when the flow area through the carb is larger than the hole in the petal. As the piston goes up, the crankcase sucks air in through the reed cage windows that have good reed petals and through the window of the missing petal. When the piston goes down, the pressure in the crankcase will cause the good petals to seal shut but some of the crankcase mixture will be forced through the hole in the broken petal before the transfer ports open. The amount of crankcase mixture that flows through the window with the broken petal depends up on the RPM, throttle position and size of the hole.
I think a reed assembly needs to seal relatively well (stop reverse flow) when the flow through the intake is low due to low RPM and or small throttle openings and have enough window area to flow enough air to support the HP capability of the engine at high RPM.
I see this new design as possibly having too much reverse flow at small throttle openings and not enough flow area at the discharge end to support the engine's air flow requirements at high RPM. If the discharge end area is increased, the velocity may drop enough to keep the design from stopping the reverse flow to an acceptable level. As the air flow increases I think the efficiency of stopping the reverse flow increases with increasing throttle position and RPM. It seems to have flow characteristics that are opposite to what most two stroke needs. I would like to see the flow ratio of:
(forward flow) / (reverse flow)
with the same pressure ratios applied to the upstream and downstream ends of the valve.
It will be interesting to wait and see flow and power test results to see if this is going to be something revolutionary or the same old pig we have seen many times before with a different color of lipstick.
