Porsche's patented six-stroke engine design adds compression and a power stroke in the middle of the cycle: Intake, Compression(a), Power(a), Compression(b), Power(b), exhaust. Between Power(a ...

In this regard, the German automotive company has filed a patent with the US Patent and Trademark Office detailing its plan ...

Most Cummins engines feature a four-stroke design, but Cummins has experimented with two-stroke diesel engine designs for use in its Indy 500 racing effort in 1934. The Cummins two-stroke diesel ...