Strokers Galore!
ceci, trouble is electronics are so accurite, both sensors and delivery. A box of infinitely adjustable electronic parts (ECU) are so cheap compared to the manufacture of mechanical injection parts. As well as the ability to pull 'tricks' that nothing mechanical can do.
Surrender to the dark side, you will. Smile Emoji.
Head mounted intake reeds have been used in millions of reciprocating compressors for over a hundred years.
As they are the major component affecting the units performance, efficiency & reliability, quite a bit of serious scientific study has been done on their dynamics.
Under normal circumstances the intake reeds must close when the pressure above the (rising) piston exceeds the static & dynamic pressure of the transfer flow.
If the engine speed was to exceed the design range by Very significant amounts, harmonics could mess up their behavior a bit.
The above illustration does not include the damping effect of the sealing face or any travel limiter, if used.
Cheers, Daryl.
Thanks for the translation Ceci. I understand spoken and written Spanish (and Italian, French, English, German and even some Dutch) but not everyone will, so translations are always welcome. Of course we have Google Translator, but its capacities are limited; it still thinks a stroke is a medical condition.
The Martin Clerch system of using the crankcase pressure fluctuation reminds me of a Tillotson pumper carb. I cannot see a real difference. Am I missing something?
Neils,
Glad to see you have been toying with this idea for so long!
Next we have to convince people that the present two stroke design will not be able to cope with what is expected of it (by the powers that be) as the bar continues to rise!
But will any manufacturer want to take the risk? (they have more or less given up except in the area of simple scooters or in certain sporting areas such as Snowmobiles or Karting!).
Will a driven front wheel ever be necessary?
Strokers Galore!
The three indicated systems (Martin Clerch, Stihl and Bosch) are not valid to be used in TPI ?.
The fluctuation in crankcase pressure may not be sufficient to pump at the proper pressure for the present-day injection (Spray creation), which implies that a suitable injector must be developed for this system.
The pumping pressure can also be increased, interacting with effects that occur in other parts of the 2S process.
Progress, but slow.
It will fit but it will be tight.
Building the top crankcase pattern next.
ceci, this one could run carburetors, rival DI?
Niel, any chance of a simple pencil drawing of the cylinder piston crank set up you have in mind..im thinking of alternatives to bolting to an existing engine with your casting expertise.. and room for the set up....are there pulley wheels and belts involved for the drive off the crank/cranks?
Possibly not directly related to this thread, but something about some more bits for the cause.
In this case, the next version of the UHV, which will feature an assymetric layout, this needed new head and reeds. So, you can see the unfinished head (no combustion bowl as yet), the reed valve to suit and the "waste" piece which is a leftover from the wire cutting process. The very thin arms are only 0.5 radially wide.
"Success is the ability to go from one failure to another with no loss of enthusiasm.”
There are currently 5 users browsing this thread. (0 members and 5 guests)
Bookmarks