Infinitely variable transmission with power branching, with electric selector
AssigneeRENAULT s.a.s.
InventorsAhmed Kefti-Cherif, Marc Picard, Michel Buannec, Sebastien Chanson
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Abstract
An infinitely variable transmission with power shunting having at least two operating modes, whereof the components are distributed between two power paths connecting in parallel the heat engine to the vehicle wheels, including at least three planetary gear trains, two electrical machines, at least one reduction stage, and a control distributing differently the power between the two power paths based on the operating mode thereof.
Claims29
A power-splitting infinitely variable transmission, comprising:
- a primary power train on which there is disposed a compound gearset including a first epicyclic gearset and a second epicyclic gearset;
- a secondary power train provided with a third epicyclic gearset and a fourth epicyclic gearset associated with electric machines including a first electric machine and a second electric machine of an electric variator, and the first electric machine of the electric variator is connected to a first reducing stage coupled to a sun gear of the first epicyclic gearset and to a ring gear of the third epicyclic gearset;
- and
- a mode-changing system configured to selectively immobilize at least one spinning element of one of the epicyclic gearsets associated with one of the electric machines, such that at least one mode of operation of the infinitely variable transmission is selected among a plurality of modes of operation, wherein
- an internal combustion engine is connected via a second reducing stage to a ring gear of the first epicyclic gearset and to a planet carrier of the second epicyclic gearset of a gearbox.
A power-splitting infinitely variable transmission, comprising:
- a third epicyclic gearset in series with one of a first epicyclic gearset and a second epicyclic gearset on one of two power trains connecting an internal combustion engine in a parallel manner to wheels of a vehicle, the third epicyclic gearset cooperating with an adjusting means such that, in a first mode of two modes of operation of the transmission, a sun gear, a ring gear, and a planet carrier of the third epicyclic gearset are spinning at a same speed, wherein,
- on a first power train of the two power trains, the vehicle wheels are connected via a first reducing stage to a planet carrier of the first epicyclic gearset, and a sun gear of the first epicyclic gearset is connected directly to a shaft of the internal combustion engine, and
- a second power train of the two power trains is coupled to the first epicyclic gearset by a ring gear of the first epicyclic gearset.
A power-splitting infinitely variable transmission, comprising:
- a first compound gearset configured to connect an internal combustion engine to vehicle wheels along a first power-splitting train;
- a second compound gearset that, along with the first compound gearset, is configured to achieve power splitting via a second power-splitting train;
- and
- a simple gearset configured to recombine the first and second power-splitting trains, wherein
- the first compound gearset, the second compound gearset, and the simple gearset achieve a system for changing modes between at least two modes of operation of the infinitely variable transmission, and
- the internal combustion engine is connected to a first epicyclic gearset of the first compound gearset via a sun gear of the first epicyclic gearset.
Dependencies are inferred from the claim text.