# US 8,784,261 B2 · Continuously variable transmission > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,261 B2 - Document ID: US8784261B2 - Status: Granted - Kind: B2 - Application number: 13/513,414 - Filed: 2009-12-02 - Published: 2012-09-27 - Granted: 2014-07-22 - Earliest claimed: 2009-12-02 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Hiroyuki Ogawa; Akira Murakami - Inventors: Hiroyuki Ogawa; Akira Murakami - Web page: https://patentgrep.com/patent/US8784261B2 ## CPC - F16H 15/52: in which a member of uniform effective diameter mounted on a shaft may co-operate with different parts of another member - F16H: GEARING ## 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. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The continuously variable transmission according to claim 1, wherein the cooling device cools the continuously variable transmission mechanism by supplying the coolant to an inside of a carrier holding the rotary members. ### Claim 3 (depends on 1) The continuously variable transmission according to claim 1, wherein the cooling device cools the continuously variable transmission mechanism by supplying the coolant to an inside of a carrier holding the rotary members. ### Claim 4 (depends on 1) The continuously variable transmission according to claim 1, wherein the cooling device cools the continuously variable transmission mechanism by supplying the coolant to an inside of a carrier holding the rotary members. ### Claim 5 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. ### Claim 6 (depends on 5) The continuously variable transmission according to claim 5, wherein the cooling performance adjusting device includes a flow rate adjusting device configured to adjust flow rate of the coolant. ### Claim 7 (depends on 6) The continuously variable transmission according to claim 6, wherein the cooling device cools the continuously variable transmission mechanism by supplying the coolant to an inside of a carrier holding the rotary members. ### Claim 8 (depends on 5) The continuously variable transmission according to claim 5, wherein the cooling device cools the continuously variable transmission mechanism by supplying the coolant to an inside of a carrier holding the rotary members. ### Claim 9 (depends on 5) The continuously variable transmission according to claim 5, wherein the cooling device cools the continuously variable transmission mechanism by supplying the coolant to an inside of a carrier holding the rotary members. ### Claim 10 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.