As on my previous thread high frequency linear actuator - Motors, Mechanics, Power and CNC - Arduino Forum
After thorough consideration i have arrived at a solution to opening and closing a exhaust valve for a 2 stroke engine the idea is using a solenoid valve to control a pilot passage which is connected to the underside of valve so when the pilot is opened the pressure lifts the valve and lets exhaust gasses escape.
and when the input from arduino is given again the solenoid valve closes the connection .
how does this idea sound is it feasible ? any suggestions on this also suggestions on the solenoid are also welcome.
You need to give serious consideration to the mass of the moving parts. Using very simple thinking : If the 2-stroke is running at 3000RPM (50 RPS) you'll be looking to open and close the valve 50 times a second and require fully open to full closed in say 6 degrees of revolution (1/60th of a rev). In other words the valve is doing the equivalent of (50 x 60) 3000 cycles per second. I'd say that's just about impossible using a solenoid operated system.
what if i operate this at say idle conditions where the rpm is only going to be 800 rpm will the solenoid be able to do that much ?
and mass of moving parts ? I'm just going to use the solenoid to open and close a little pilot passage which lets in air to the underside of valve where the valve pushes it up not the solenoid do explain if there are any difficulties in that i do know that high speed may be a hinderance
You've been given this project as a training assignment. Such assignments are not always feasible or practical, the purpose is to see how YOU progress. The basis of the project is to identify how you research and develop an experimental rig. So far you've asked questions and been given feedback. What reading (research have you done). Perhaps it's now time you started making metal and build a rig to see if your ideas are feasible. Bear in mind that physical experiments do not have to be practical, the objective is to prove a principal. If this succeeds you then look at the practicality of the design.
For really fast motion you use voice-coil technology, it works for speakers doesn't it?
Its all about keeping the mass down, just the bare minimum mechanical support to the
copper coil and a static permanent or electromagnet.
Balanced rotor is much easier than oscillating mass of course, so a cam-operated
mechanism is up there for consideration.
