air suspension

i can already 3 wheel but i wanted to do a suck up. i have an idea of what to do, but dont know if its right. do you put two valves near the exhuast end of the cylinder and then push the piston up and then release it with the 2nd valve. but then wont you have to leave the realese valve open becuase when you try to pick the car up there would be no room for the air to fill the cylinder if the is a limited amount of flow in the exhuast valve line?

any ideas, or suggestion will be fine thank you.