The internal combustion engine went through several ... in the cars and trucks seen on today's roadways rely on the four-cycle-engine principles developed in the late 1800s by Nikolaus Otto, ...

While the first Otto cycle patent was filed in 1887, Rudolf Diesel developed an alternate cycle for use in an internal combustion engine, with his first patent filed in 1898.

A four-stroke internal combustion engine operates on the Otto cycle, a design conceived by German-born Nicolaus August Otto as early as 1861 and eventually awarded patent number 365701.

This Otto vertical gas engine was originally inside the cellar of Boyd’s Drug Store, which was in Washington DC. It was used primarily in the 1890s by Dr George W. Boyd before being donated to the ...