Adolphe Kégresse
Adolphe Kégresse (born June 20, 1879 in Héricourt , Haute-Saône, † February 9, 1943 in Croissy-sur-Seine ) was a French engineer and designer. He was a co-inventor of the half-track vehicle , which was introduced as a tractor by the French army in 1929 as the Citroën-Kégresse P17 .
Life
Kégresse emigrated to Russia at a young age and was responsible for the operation of agricultural equipment at the court of Tsar Nicholas II . Here he improved and perfected the idea of the caterpillar drive . This was previously only used for military purposes and was very slow and prone to failure. After his return to France, Kégresse worked for the manufacturer Citroën and developed the first half-track vehicles that were produced for civil use. He developed a drive called a half-chain or a caterpillar. What was new about this invention was that tracks were fitted instead of the rear wheels. The first model of this type was the B12. It was initially produced by the Autochenille Citroën-Hinstin-Kégresse joint venture , and in 1920 André Citroën acquired the Kégresse patent.
transmission
In 1939, Kégresse applied for the first patent for a kind of dual clutch transmission , a year before Professor Rudolf Franke from the TH Darmstadt , who presented a similar design. It was not until the 1980s that Porsche realized the invention under the name PDK (Porsche Doppelkupplungsgetriebe).
Web links
Individual evidence
- ↑ Oerlikon dual clutch transmission - in fractions of a second. (PDF; 1.46 MB) In: oerlikon Communicator - Global employee newspaper of the Oerlikon Group - 02/07 edition. OC Oerlikon Management AG, February 13, 2007, p. 18 , accessed on March 30, 2014 .
| personal data | |
|---|---|
| SURNAME | Kégresse, Adolphe |
| BRIEF DESCRIPTION | French engineer and designer |
| DATE OF BIRTH | June 20, 1879 |
| PLACE OF BIRTH | Héricourt , Haute-Saône |
| DATE OF DEATH | February 9, 1943 |
| Place of death | Croissy-sur-Seine |