Continuously variable transmission
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsHiroyuki Ogawa, Akira Murakami
Life of this patent
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Abstract
A continuously variable transmission includes a continuously variable transmission mechanism that includes an input disk, an output disk, and planetary balls sandwiched between them and that steplessly changes a transmission ratio between the input disk and the output disk by tilting the planetary balls, wherein cooling performance of a cooling device for the continuously variable transmission mechanism is enhanced as the transmission ratio becomes larger than 1 or smaller than 1.
Claims10
A continuously variable transmission including a continuously variable transmission mechanism that includes an input member, an output member, and rotary members sandwiched between them and that steplessly changes a transmission ratio between the input member and the output member by tilting the rotary members, the continuously variable transmission comprising:
- a cooling device configured to cool the continuously variable transmission mechanism by supplying coolant thereto in such a manner that flow rate of the coolant is increased as the transmission ratio becomes larger than 1 or smaller than 1,
- wherein the continuously variable transmission mechanism is incorporated in a rotary electrical machine, and
- wherein the cooling device also cools the rotary electrical machine.
A continuously variable transmission including a continuously variable transmission mechanism that includes an input member, an output member, and rotary members sandwiched between them and that steplessly changes a transmission ratio between the input member and the output member by tilting the rotary members, the continuously variable transmission comprising:
- a cooling device configured to cool the continuously variable transmission mechanism by supplying coolant thereto;
- and
- a cooling performance adjusting device configured to increase flow rate of the coolant as the transmission ratio becomes larger than 1 or smaller than 1,
- wherein the cooling device also cools a rotary electrical machine incorporating the continuously variable transmission mechanism, and the cooling performance adjusting device is provided between the continuously variable transmission mechanism and the rotary electrical machine.
A continuously variable transmission including as a continuously variable transmission mechanism a traction planetary gear mechanism, the continuously variable transmission comprising:
- a cooling device configured to cool the continuously variable transmission mechanism by supplying coolant thereto in such a manner that flow rate of the coolant is increased as the transmission ratio becomes larger than 1 or smaller than 1,
- wherein the continuously variable transmission mechanism is incorporated in a rotary electrical machine, and
- wherein the cooling device also cools the rotary electrical machine.
Dependencies are inferred from the claim text.