This is the third and final engine contributed by Jan Ridders of the Netherlands, a pressure controlled 2-stroke engine.
I asked Jan to pick his most simple designs in each of 3 categories, Stirling, Flame Eater, and IC. This set of plans is for his most simple IC design, a pressure controlled 2-stroke engine. If you’d like to see the other two designs shared by Jan, they can be found here: Jan’s Coffee Cup Stirling Engine and Jan’s Flame Sucker. And of course, all of Jan’s other engines can be found by visiting his site, which is written in both English and Dutch.
Here’s an animation and a description of the principle behind Jan’s masterpiece (excerpt from Jan’s site):
A ball valve only opens when the pressure below the ball is higher then above the ball. For the upper valve this is only the case, and for a very short time, when the piston reaches the exhaust port. The pressed gas mix below the piston and between the two ball valves is injected then, filling the cylinder and pushing out the remaining burned gases. Before and shortly after that moment the pressure above the ball in the upper valve is always higher then below the ball. When the piston is moving upwards there is an overpressure above the ball (gas mix compression) and a lower atmospheric pressure of the sucked-in fresh gas mix below the ball. When the piston is moving downwards there is a high overpressure above the ball due to the combustion (power stroke) and a much lower overpressure of the compressed fresh gas mix below the ball. So also during that power stroke the upper ball valve keeps closed until the piston opens the exhaust port.
So the timing of the process is exactly right and automatically controlled by the alternating pressures in the system. That is why I called this engine the “Pressure controlled Two-stroke”.
Here’s a video of the engine in action:
For more information on this engine (including construction tips and trouble shooting) please visit Jan’s website. Jan also has many other engines on his site and he shares his plans freely with anyone by request.
I’d like to say Thank You one more time to Jan Ridders for sharing multiple sets of plans with this site. By sharing your plans you’ve helped this site grow.
Pressure_Controlled_2-Stroke_Engine_-_Jan_Ridders.pdf (5.1 MiB, 2,678 downloads)
NOTE: You need to be a registered member (and logged in) to download this file.
- HOW? You can register using the yellow "Register" link in the upper right corner of the website. If you've registered previously you just need to log in using the "Have an account? Log In" link located in the upper right corner of the site.
- COST? It's currently free to register and become a member of this site.
- PRIVACY? Your email address will be encrypted and kept private.
YOU WILL NOT RECEIVE SPAM FROM THIS SITE!
- BENEFITS? Registering for the site allows you to download plans and other documents. Registering will also grant you forum access, allowing you to log into the forum using the same username and password you used to register for the site.
- RSS? Subscribing to the RSS feed or subscribing to receive email messages whenever the site content is updated is not the same as registering. If you would like to receive email notifications you still need to sign up for that service. AND WE STILL WON'T SPAM YOU! We will, however, send you an email whenever the site is updated with new content. That's typically about 1 email a month or less.