Porsche recently received a patent for a six-stroke engine. Here are all the details, including what makes a six-stroke ...

Nikolaus Otto, working in Germany, designed an engine which provided a separate piston stroke (a move from one end of the cylinder to the other) for each of the necessary four functions. As in the ...

It is shown that when the piston finishes its stroke flush with the wall the piston vortex interacts with the primary vortex. Experiments reveal that the piston vortex can have a significant effect on ...

By the lead of a valve is meant that the port is opened a little in advance of the piston, or the port is open for one stroke before the piston has quite finished the preceding one. This valve ...

In its most basic form, the piston in a free piston engine simply ... the traditional four stroke reciprocating engine has continued to dominate the transportation space. Many of these ...

We’re introduced to the traditional two-stroke diesel engine as thermally efficient but not smooth-running, and then the gas turbine as smooth but much more inefficient. The free piston engine ...