Multi-range, belt-type, continuously variable transmission

Details Multi-range, belt-type, continuously variable transmission Multi-range, belt-type, continuously variable transmission

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 37/08 (2006.01)

Patent

CA 2287310

In a multi-range, continuously variable transmission according to the present invention, input engine power is split between a belt-type, continuously variable transmission unit and a system of interconnected planetary gears. This gear system then combines the split power received from the engine and the transmission unit output to produce a transmission output for propelling a vehicle in multiple forward ranges and one reverse range, each range of continuously variable speed produced by stroking the transmission unit. Synchronous shifting between ranges is achieved by selectively clutching or braking elements of the planetary gear sets at appropriate stroke settings of the transmission unit, such that the vehicle may be smoothly accelerated from rest to maximum speed.

Dans cette transmission à changement de vitesses continu à plages multiples, la puissance d'entrée du moteur est fractionnée entre une unité de transmission à changement de vitesse continu du type à courroie et un système d'engrenages planétaires interconnectés. Ce train d'engrenages combine alors la puissance fractionnée provenant de la sortie du moteur et de l'unité de transmission pour produire une sortie de transmission et ce, afin de propulser un véhicule à plusieurs vitesses de marche avant et à une vitesse de marche arrière, chaque plage de vitesse variable en continu étant produite par déplacement de l'unité de transmission. Le transfert synchrone entre plages s'effectue par embrayage ou freinage sélectifs d'éléments des trains planétaires à des points de réglage appropriés de la course de l'unité de transmission de sorte que le véhicule est en mesure de passer sans à-coups de l'arrêt à la vitesse maximale.

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