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Ravigneaux compound planetary gear set

This movie show a Ravigneaux compound planetary gear set, used in automatic transmissions. It is made of two planetary geartrains sharing the same ring gear (in the movies, the ring gear has been split in two parts to better see the inner mechanism). The two yellow ring gears turn together. All planets (short and long) are on the same planet carrier. Number of teeth Planets (long and short) 12 Little Sun Gear (magenta) 36 Large Sun Gear (orange) 60 Ring Gear (yellow) 84 1st Gear Input: Little Sun Gear (magenta) Output: Ring gear (yellow) Planet Carrier held stationary Ratio: 2.3 : 1 2nd Gear Input: Little Sun Gear (magenta) Output: Ring gear (yellow) Large Sun Gear (orange) held stationary Ratio: 1.6 : 1 3rd Gear Input: Little Sun Gear (magenta) Output: Ring gear (yellow) All parts turn together Ratio: 1 : 1 4th Gear (overdrive) Input: Planet Carrier Output: Ring gear (yellow) Large Sun Gear (orange) held stationary Ratio: 0.6 : 1 Reverse Input: Large Sun Gear (orange) Output: Ring gear (yellow) Planet Carrier held stationary Ratio: -1.4 : 1 ------------------------------------------ Ce film montre une transmission automatique de type Ravigneaux, constitu?e de deux trains d'engrenages plan?taires partageant une m?me couronne (la couronne a ?t? s?par?e en deux pour mieux voir l'int?rieur du m?canisme). Nombre de dents: Plan?tes (longues et courtes) 12 Petit pignon central (magenta) 36 Grand pignon central (orange) 60 Couronne (yellow) 84 1er rapport: Entr?e: Petit pignon central (magenta) Sortie: Couronne (jaune) Support des satellites immobile Rapport: 2.3 : 1 2?me rapport: Entr?e: Petit pignon central (magenta) Sortie: Couronne (jaune) Grand pignon central (orange) immobile Rapport: 1.6 : 1 3?me rapport: Entr?e: Petit pignon central (magenta) Sortie: Couronne (jaune) Tout tourne ensemble Rapport: 1 : 1 4?me rapport (overdrive): Entr?e: Support des satellites Sortie: Couronne (jaune) Grand pignon central (orange) immobile Rapport: 0.6 : 1 Marche arri?re: Entr?e: Grand pignon central (orange) Sortie: Couronne (jaune) Support des satellites immobile Rapport: -1.4 : 1
Length: 02:34

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