Differential Stroke-Cycle Piston Technology (D-Cycle)
The heart of YAN Engine’s Differential Stroke-Cycle Piston Technology – or D-Cycle™ – is a vertically split-piston that completes the same four engine strokes of a traditional internal combustion engine (ICE) in a single crankshaft revolution.
This is the working path for a typical D-Cycle™ implementation – from left to right:
- the crown is mated with the seat during the power stroke;
- the two halves split at the low-pressure portion of the power stroke;
- the crown performs the exhaust and intake strokes; and
- the crown and seat recombine during the compression stroke.
All four strokes – power, exhaust, intake, and compression – are completed within a single crankshaft rotation.
D-Cycle™ technology executes a true mechanical Atkinson stroke, reduces cyclic energy losses, and matches intake displacement to power demand – which all adds up to higher power density and better fuel efficiency.
D-Cycle™ can be designed into existing production engines, and we have successfully retrofitted a variety of engine sizes using different fuel sources.