René Vuaillat

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René Vuaillat (born March 28, 1923 in Saint-Germain-de-Joux, Ain) was an engineer of Arts and Crafts (Cluny 1941) , engineer of the Superior National School of IFP (1946) . It actively participates in the Maquis of Ain. For Renault, he designed the famous "Cléon-Fonte engine" , it is also the inventor of the braking distribution device full grip . It will also director of Renault-Gordini.


The September 10, 1946 , is an engineer René Vuaillat engine to the Dean of Studies at Renault . On 1 January 1952 , he was assigned to the direction of applied research , where he developed the adaptation of free-piston generators Pescara on our locomotives . On August 1, 1953, deputy department head passes motors studies. On 1 January 1957 , he became Head of Studies engines.[1]

He designed the famous " Sierra engine" better known as the "Cléon-Fonte engine". It appeared in 1962 on the Renault Floride S et la Renault 8. This four-cylinder models have animated generations passing through the years 956 to 1565 cm3 cm3 of Florida to Twingo via the Renault 11 Turbo and Renault 5 Turbo 2. This engine is known for its robustness and longevity. This legendary engine equipped with the Renault generations for decades: Renault Floride, Caravelle, Alpine A110, R4, R5, Le Car, Super 5, R6, R7 (Siete), R8/R10, R9/R11, Alliance/Encore, R12, R15, R18, R19, R21 (Export), Estafette, Trafic 1, Express (Rapid/Extra), Fuego, Twingo 1, Clio 1. Not to mention the range Dacia as of 1971.[2]

On 1 January 1962 , he became head of service and chassis architecture, and mechanical design project became director on 1 July 1965. On 1 January 1976 , René Vuaillat became director of Renault-Gordini, it is also deputy director of automotive research and development. He ended his career as director of advanced product technology.[1]

It is also René Vuaillat that we owe the braking distribution device full grip , whose patent was filed by Régie Nationale des Usines Renault 13 February 1980. To summarize the principle : The front axle and rear axle each having a differential , are connected by a free wheel which engages and locks when an axle is braked more than the other (main Application braking of a motor vehicle).[3]

He retired , December 31, 1985.

Cléon-Fonte engine[edit]


  • War Cross 1939-1945
  • Knight of the National Order of Merit (1970)

Notes and references[edit]

  1. ^ a b "Cléon - Association RENAULT HISTOIRE". Association RENAULT HISTOIRE.
  2. ^ « Moteur Cléon-Fonte: son histoire », sur
  3. ^ Patent: Braking distribution device to complete sticking EP 0014954 A1 sur