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Alphonse Beau de Rochas: Pioneer of the Four-Stroke Engine

Alphonse Beau de Rochas, a French engineer, was the first to patent the four-stroke internal combustion engine in 1862. While he didn't build one himself, his groundbreaking idea was later developed by Nicolaus Otto and other engineers, paving the way for modern engine technology.
French engineer
Alphonse Eugène Beau de Rochas
Alphonse Beau de Rochas
Born(1815-04-09)9 April 1815
Digne-les-Bains, Alpes-de-Haute-Provence
Died27 March 1893(1893-03-27) (aged 77)
Vincennes
NationalityFrench
OccupationEngineer
Known forFour-stroke internal-combustion engine

Alphonse Eugène Beau de Rochas (9 April 1815, Digne-les-Bains, Alpes-de-Haute-Provence – 27 March 1893, Vincennes) was a French engineer. He was the first to patent the four-stroke engine in 1862, but he did not build one and the idea was subsequently developed by Nicolaus Otto and other engineers.