Fully reverse engineered Toyota 22RE 4 cylinder engine. Can utterly print a version that is totally rotating. Pistons working crank, and valve train. The valves open and close!!!. It might not be the most interesting engine but. Great the way the moving parts in them function and in the event you would like to know about engines. All components are printed except for several bearings and fasteners.
More than THREE days of complete print time.
The block alone was 34 hours. So be sure to have a printer that is trusted and nicely calibrated.
Some print times computed in Cura at .2millimeter layer height
Engine Block - 40 hours
Head - 23 hours
Valve Cover - 10 hours
Oil pan - 14 hours
Upgrade 02/01/2015: Updated the oil pan, timing cover, and back primary cover to use 4mm x 2mm disk magnets so the oil pan will remain on better. Paste magnets in and let each magnet to be exposed about 1mm above surface to enable the oil pan as well as a gap between the block.
Note!!! Connecting rod covers and spacer .125 weren't scaled correctly. Way too large/little. Updated 01/27/2015
Upgrade 01/27/2015: Added ported model of head. Has 3mm holes for spark plugs or LEDs for future upgrades. Print with support touching construct plate. Printed clean up and only a great number of support material to remove. However, you can see the valve in the event that you look through the interfaces moving.
Update 01/27/2015: Made intake. Lower can be printed with no support. Upper been divide into two halfs to print and paste together afterwards. In case you would like to print it with all support, Additionally, I uploaded the entire upper consumption. Manifold attaches with 4mmx2mm magnets just such as the header. I utilized 14 magnets total(7 on each side. 5 on top, 2 on bottom) due to the weight of the consumption. I assembled the lower, top, and accelerator bossy with m3 SHCS should you would like, however you can paste it. Will upload a fresh variant tomorrow of the head that's ported with spark plug holes. Only examine printing it now.
Upgrade 01/25/2015: I uploaded it and made a header for the engine. It printed incredibly in Cura with support. Be sure to choose "touching buildplate" for you support choice as the header is hollow the same as a real one and in the event that you do not, it'll fill the interior with support. It is held on with 8 4mm x 2mm disc world magnets epoxied in.
This version was engineered from a 22RE Toyota engine, All modeling was done in SolidWorks since that the largest my printer could print along with the STL files were scaled to 35% for printing. All components were printed on my RepRap original Prusa in PLA. There are 80 printed parts in this assembly, not including bearings or any fasteners. Likely a 1kg that is entire roll of plastic.
The version may be assembled in various periods, in the event you simply need the short block then just print those components. The head is fully removable to help you see additionally and the pistons going the valves opening and shutting. The oil pan is attached with magnets so you see the crankshaft going and can take it away.
Itis a complicated print and version. Complete print time of the block at 35% scale of the original was only over 34 hours. Only the head print time was 20 hours. Ensure you have a robust and nicely calibrated machine in case you'd like to print this. It is undoubtedly is a challenge for your printer as well as you. Sourcing bearings and fasteners will be a problem although it's possible for you to scale the model.
See the hardware list for all none printed components, bearings are all common bearings used on 3D printers so that they need to be simple to source. As you can buy individual amounts hardware is sourced from bolt storehouse. For the valve springs, I formed them using my drill and a 1/4" ratchet extension as a mandrel. I utilized 0.023" steel mig welding cable but you can use anything similar. The outer diameter of the spring should approximately be 0.470". Each spring stretch it enough to keep the valve shut and only has 10 loops. I wasn't unable to discover a pre-made springs with the perfect size and spring constant. If somebody does know of a spring that may operate with this please I'd like to know.
For Drive belts to join the fan pulley as well as the electric motor, I used rubber bands. Electric motor pulley and the crank pulley are setup to make use of a timing belt but I never got around to sourcing one. The teeth spacing is for a gates additional light timing belt. 1/8" wide, and .080" pitch.
If you do make the decision to print and assemble this model you'll most likely run into some fitment problems as a result of various printers, plastics, etc. For those who have some questions allow me to know. All STL files are not bad, they've been fixed with NetFabb so there should not be any issues there.
Once I get an opportunity I will upload assembly drawings later on.