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Thanks Jim. I appreciate the help.

Here we go. This article here corresponds to my first idea, and is similar in system requirements. Maybe I should just copy them exactly. http://www.findarticles.com/p/articles/mi_m3012/is_5_180/ai_62685781

kinda sorta. They are both related. Sorry, I am not very good at getting things acrossed through typing. Nope, I'm pretty sure I can find something suitable. I'm not trying to discredit any given advice of course. I think International Diesel uses something similar in their camless engines...

Yes, I know this is pretty extreme. I have found a few sources for the 24v solenoids so far. But no 48v yet. I'm only hoping I can get a fast enough response time.

Please excuse my typing skills. I meant *tough spring*. After talking to a friend tonight I am reconsidering the hydraulic system altogether. Instead we are looking at just using a solenoid to replace the valve and hydraulic cylinder altogether. I'm sure this will bring a whole new set...

That is a good idea, thanks! In fact, you've all been really helpful, I appreciate it. It definately does a lot of good to take a step back and consider all the problems, instead of jumping the gun.

Gkranz, you are exactly right. We are going to be testing valve springs for internal combustion engines. It is to make sure the springs operate to the rpm and lift at which we rate them. HAHA! I'm going to have fun with this one then. It was more like "yeah sure, I'll give it a shot". I...

Ahhh yes... Making the cylinder respond at such a speed is going to be difficult (at least it will only have to do it for a short time. The load it is pushing is a touch spring, so I think it can. Just going to take some time. I am incorporating this into a project for a friend of mine. The...

Oh yeah, sorry. Bore: 5.8 mm Max Stroke: 10.5 mm

Thanks for all the GOOD advice. I am simply trying to consider all aspects involved in this project. Since I am new to hydraulics I do not know they limitations, and am having a hard time finding resources applying to the physics of hydraulics. I have found at least one source for high speed...

okay, sorry I posted this thread a little prematurely. I believe I have solved this problem. I will just slow the piston down with a spring (duh! I tried to make it more complicated than it had to be). Still not quite sure how to make the stroke length continuously variable. Are there...

well, I re-evaluated the amount of pressure and the forces produced (oil is switched through a hydraulic cylinder). I think the flow will be closer to 750 mL/min. I know I have seen some pretty quick cycle times for valves somewhere.

aaah... facetious

^^ Edit: 1. I must be able to control the *stroke length*.

Oh, I forgot. It must also be able to flow roughly 2.3 Liters a minute.

Does anyone know of a souce for high speed valves. Needs for my application are as follows. 2-way latchable Must be able to complete 40+ cycles per second Temperatures up to 200*F Pressures of 3000 psi.

Sorry if this is a stupid question, but I am new to the subject and am quite enthusiastic about a project I have going. I will be using a 2-way valve to control the flow of oil into and out of a hydraulic cylinder. The cylinder must be able to complete 40 cycles a second. For my purposes...