In case you didn't know, each movement between TDC and BDC is referred to as an engine stroke. However, it sometimes gets confusing when people use different terms like 2-cycle and 4-cycle when ...

The German automaker sees your four-stroke engine and raises you... two more strokes. Ready for some math? Porsche just ...

The power stroke extracts work from these gases as they expand and force the piston to BDC. In the exhaust stroke, the exhaust valve is open and the combustion products are expelled from the cylinder.

Along with a TIG welder and mechanical ingenuity bordering on genius-level, all of which come to bear on this fridge compressor to four-stroke engine build. The video posted by [Let’s Learn ...

[Huib Visser] built this glass cylinder four-stroke engine and he took great care to make it beautiful. We don’t need our projects to be polished and gleaming, but we have to admit that this the ...

Ilmor says the next step is to build another working prototype with targets of 10% better fuel efficiency and 20% less engine weight compared to an equivalent four-stroke engine.