Functional 4-Stroke Engine
Print Profile(2)
Bill of Materials
Description
This is a single-cylinder four-stroke engine with functional valves. Good for educational purposes or just having a nice toy to play around. The assembly process is simple yet fun with only minimum amount of non-printed parts needed. Please refer assembly guide for location of parts and part list. When assembling, make sure to align timing marks in the 3 gears. If not aligned, collision between piston and valves can happen. Printing all parts (with my print profile) takes around 14,5h with 357g of material needed. You can choose between 3 variants of cylinder heads: Without text, with 4-stroke text or with OHC text.
Non-printed parts needed:
-2pcs Compression spring for valves (I used 9.5x19mm): max outside diameter 10mm, min inside diameter 7.5mm. length ideally around 20mm, but not less than 14mm.
-2pcs screw for exhaust, M2.5X8. If you have a Bambu printer, the provided screws for the scraper are suitable.
Tips for smooth functioning:
-Sand down sliding surfaces if needed, especially holes for crank shaft and the shaft for idler gear (see picture)
-Add lubricant. Especially valve stems might need it if they stick up too much
Documentation (2)
License
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.
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