Édouard Napoléon François Delamare-Deboutteville (8 February 1856 – 17 February 1901) was a French inventor, engineer, and industrialist. He is known for designing and operating one of the earliest automobiles powered by a petrol-fuelled four-stroke internal combustion engine, predating the Benz Patent-Motorwagen by nearly two years.
Early life Delamare-Deboutteville was born in Rouen, France, into a wealthy textile industrialist family. He studied at the École Supérieure de Commerce de Rouen and later managed the family spinning mill at Mont-Grimont in Fontaine-le-Bourg.
Automotive innovation In 1883, he and mechanic Léon Malandin developed an early petrol-fuelled internal combustion engine, first mounted on a tricycle then evolved into a four-wheeled vehicle. On 12 February 1884, they successfully ran a car between Fontaine-le-Bourg and Cailly.
On that day, Delamare-Deboutteville filed French patent no. 160267 (associated with Malandin), which described their four-cylinder petrol vehicle with electrical ignition, chain transmission, shaft and differential. This patent is widely recognized as the first ever granted for a four-wheeled automobile using liquid fuel.
The vehicle specifications as described by historical sources include: Twin-cylinder horizontal engine (~8 hp at 250 rpm, ≈ 8129 cm³ displacement) Petrol mixed with ~3% oil Carburetor, chain drive, and differential
Though fragile and never commercialized, the prototype is considered a technical milestone in automotive history.
Other work He continued developing gas engines under the brand Simplex. He received a gold medal at the 1889 Exposition Universelle in Paris for a 100 hp gas engine. The Belgian firm John Cockerill acquired manufacturing rights in July 1889 and later produced engines up to 700 hp by 1899.
Delamare-Deboutteville also published works on oyster farming, Sanskrit grammar, and maintained an ornithological collection. He held over 70 patents and was made Officer of the Legion of Honour in 1896.
Death He died of typhoid fever on 17 February 1901 at Mont-Grimont near Fontaine-le-Bourg and was buried in the family chapel.
Legacy While Karl Benz is often credited as the "inventor of the automobile," some historians acknowledge Delamare-Deboutteville as a pioneering precursor in the development of motor vehicles. His contribution is often overshadowed by commercial successes of others.
See also History of the automobile Karl Benz Étienne Lenoir Gottlieb Daimler
References
Further reading Jehan Le Povremoyne, “Inventeurs de l'automobile à essence … un monument à Fontaine‑le‑Bourg”, *Revue de Rouen* Gérard Leterc, “Édouard Delamare-Deboutteville … moteurs Simplex aux expositions universelles”, *Bulletin de la Société libre d’émulation de la Seine‑Maritime* (2003) Alain Dugard, *Édouard Delamare-Deboutteville “le père de l’automobile moderne”* (Ed. Nationale 7, 1984)