4 ms·
The four strokes of a four stroke cylinder are intake, compression, combustion, and exhaust. That's down, up, down, up. Since there's no down or up in any of th
by dsr_ 4y ago
The four strokes of a four stroke cylinder are intake, compression, combustion, and exhaust. That's down, up, down, up. Since there's no down or up in any of this engine's combustion chambers, "strokes" is probably inappropriate.
- Cthulhu_ 4y agoI think for comparison, this (and the Wankel) would have to do two rotations for a single cycle.
- mcronce 4y agoTypical Otto cycle 4-stroke piston engines do two rotations for a single cycle. Wankels are more complicated; each rotor face acts as a separate combustion chamber and all four strokes happen in a single rotation. It looks like the situation is similar with LiquidPiston's implementation.
- RickHull 4y agoThe strokes have nothing to do with up and down (e.g. flat motors, like a boxer), but to do with compression and expansion. The direction of compression doesn't really matter aside from packaging concerns. As you said, 4 stroke has intake, compression, combustion, and exhaust. That's expansion, compression, expansion, compression. It fires between compression and combustion. A 2 stroke motor has compression and expansion. It fires between compression and expansion. Intake, exhaust, and combustion happen during the expansion phase. A rotary motor is traditionally 4 stroke, and I'm not sure a 2 stroke version is feasible. The LiquidPiston rotary appears to be a 4 stroke to me, despite the article text.