Alphonse Beau de Rochas

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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

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 1861, a year after Christian Reithmann was granted a patent in Germany and 16 years before Nicolaus Otto obtained his patent.

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Alphonse Eugène Beau de Rochas
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