Alphonse Beau de Rochas

Alphonse Eugène Beau de Rochas (9 April 1815, Digne-les-Bains, Alpes-de-Haute-Provence – 27 March 1893) was a French engineer who originated the principle of the four-stroke internal-combustion engine. His achievement lay partly in his emphasizing the previously unappreciated importance of compressing the fuel–air mixture before ignition. He published his results in 1862, 16 years before Nicolaus Otto obtained his patent.

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)
NationalityFrench
OccupationEngineer
Known forFour-stroke internal-combustion engine


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