Building a LEGO Pneumatic Machine with Variable Valve Timing

🔽 A LEGO Pneumatic Switchless Machine with adjustable timing, working throttle with idle mechanism, openable controls panel and building instructions. 🔽 This engine is a custom creation of my own. Build around a single pneumatic cylinder, with air distribution using custom valves. The switchless valves are composed of 2 hose loops by cylinder chambers, which are operated by pushers with a single camshaft, enabling to pinch the hose to restrict the air flow. It’s switchless in the sense that it doesn’t use the official LEGO switch. In LEGO lingo this is called a switchless mechanism, not to say it doesn’t have a switch, but to say it didn’t use a LEGO switch metapiece. The whole valve assembly can rotate around the camshaft, enabling a rotation angle offset between the camshaft assembly and the crankshaft, in order to adjust precisely the timing (ignition point of internal combustion engine). The yellow wheel on the front panel controls the timing angle, with a vis