When was the four-stroke engine, a fundamental component of gasoline vehicles, patented by Nikolaus Otto?

Answer

1876

The four-stroke engine technology, which paved the way for practical gasoline automobiles, was patented by Nikolaus Otto in 1876.

When was the four-stroke engine, a fundamental component of gasoline vehicles, patented by Nikolaus Otto?
inventionHistoryAutomobilePopularitygasoline