Finnish manufacturer Wärtsilä introduced an engine back in 2015 that was so good, it snagged a Guinness World Records title for being the most efficient four-stroke diesel engine shortly after its ...

For hundreds of years of human history, the invention that has defined our ability to travel, explore, and expand our boundaries has been the combustion engine. This hallmark of mechanical development ...

Essentially, it’s a six-stroke engine that relies on a different stroke length for one of the strokes. The first three strokes are very like those in a four-stroke: intake, compression, ...