# US 10,502,268 B2 · Drivetrain provided with a CVT > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,268 B2 - Document ID: US10502268B2 - Status: Granted - Kind: B2 - Application number: 15/522,887 - Filed: 2015-10-30 - Published: 2018-09-27 - Granted: 2019-12-10 - Earliest claimed: 2014-11-10 - Assignees: Transmission Cvtcorp Inc. - Applicants: Transmission Cvtcorp Inc. - Inventors: Jean-François Dionne; Jean-Robert Desmeules; Rémi Tremblay - Web page: https://patentgrep.com/patent/US10502268B2 ## CPC - F16D 13/58: Details {(tools for assembling or disassembling clutches B25B27/0064)} - F16D 13/76: specially adapted to incorporate with other transmission parts, i.e. at least one of the clutch parts also having another function, e.g. being the disc of a pulley - F16H 37/021: {toothed gearing combined with continuously variable friction gearing} - F16H 37/086: {CVT using two coaxial friction members cooperating with at least one intermediate friction member} - F02D 21/00: Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas - F16H 3/006: {power being selectively transmitted by parallel flow paths, e.g. dual clutch transmissions} - F16H 15/38: with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces - F16H 2037/028: {having two distinct forward drive ratios and one reverse drive ratio arranged in series with a continuously variable transmission unit} - F16H 2037/088: {Power-split transmissions with summing differentials, with the input of the CVT connected or connectable to the input shaft} - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - F16H: GEARING - F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W) ## Abstract A drivetrain for connection between the output of a prime mover and the input of a final drive is described herein. The drivetrain comprises a CVT including an input connected to the output of the prime mover and an output; a power mixer having a first input connected to the output of the prime mover, a second input coupled to the output disk of the CVT and an output; a three-speed transmission having an input connected to the output of the power mixer and an output connected to the input of the final drive. ## Claims ### Claim 1 A drivetrain for connection between the output of a prime mover and the input of a final drive; the drivetrain comprising: a CVT including an input connected to the output of the prime mover and an output; a transmission having an input connected to the output of the CVT and an output connectable to the input of the final drive; the transmission including first and second cascading selection mechanisms provided between the input of the transmission and the input of the final drive; wherein the first and second cascading selection mechanisms are so configured and controlled that the position of the second selection mechanism can be changed by the controller depending on the next desirable configuration. ### Claim 2 (depends on 1) A drivetrain as recited in claim 1, wherein the first selection mechanism includes a three-position friction clutch including an input and first and second outputs. ### Claim 3 (depends on 1) A drivetrain as recited in claim 1, wherein the second selection mechanism includes first and second clutches, each including an input connected to a respective output of the first selection mechanism. ### Claim 4 (depends on 3) A drivetrain as recited in claim 3, wherein the first and second clutches are dog clutches. ### Claim 5 (depends on 3) A drivetrain as recited in claim 3, wherein the first and second clutches of the second selection mechanism each include first and second outputs connected to a respective gear train. ### Claim 6 (depends on 5) A drivetrain as recited in claim 5, wherein the first and second outputs of the first clutch of the second selection mechanism are respectively connected to a low-speed gear train and to a high-speed gear train and wherein the first and second outputs of the second clutch of the second selection mechanism are respectively connected to a medium-speed gear train and to a reverse-speed gear train. ### Claim 7 (depends on 6) A drivetrain as recited in claim 6, wherein each of the low-speed, medium-speed, high-speed and reverse gear trains include an output connected to the final drive. ### Claim 8 (depends on 1) A drivetrain as recited in claim 1, wherein the second selection mechanism includes a) a first clutch including first and second inputs connected to a first output of the first selection mechanism via a low-speed gear train and a high-speed gear train, respectively and b) a second clutch including first and second inputs connected to a second output of the first selection mechanism via a medium-speed gear train and a reverse-speed gear train, respectively. ### Claim 9 (depends on 8) A drivetrain as recited in claim 8, wherein the first and second clutches are dog clutches. ### Claim 10 (depends on 8) A drivetrain as recited in claim 8, wherein the low-speed gear train is a planetary gear train having a first input connected to the first output of the three-position friction clutch, a second input connected to the output of the prime mover and an output. ### Claim 11 (depends on 1) A drivetrain as recited in claim 1, wherein the transmission further comprises a power mixer having a first input connected to the output of the CVT, a second input connected to the output of the prime mover and an output connected to an input of the first selection mechanism. ### Claim 12 (depends on 11) A drivetrain as recited in claim 11, wherein the power mixer includes a planetary gear train. ### Claim 13 (depends on 2) A drivetrain as recited in claim 2, wherein the first output of the three-position friction clutch is connected to the input of the final drive via a low-speed gear train; and wherein the second selection mechanism includes a three-position clutch having first and second inputs and an output connected to the input of the final drive; the first input being connected to the second output of the three-position friction clutch via a high-speed gear train and the second input being connected to the second output of the three-position friction clutch via a reverse speed gear train. ### Claim 14 A drivetrain for connection to the output of a prime mover and to the input of a final drive therebetween; the drivetrain comprising: a CVT including an input coupled to the output of the prime mover and an output; the CVT being so configured as to provide, between the input and output thereof, a primary continuous range of gear ratios; a transmission including: a first selection mechanism including an input connected to the output of the CVT and first and second outputs; a first gear train connected between the first output of the first selection mechanism and the input of the final drive, the first gear train being so configured as to selectively provide, in cooperation with the CVT, a first secondary continuous gear ratio between the output of the prime mover and the input of the final drive; a second selection mechanism including first and second inputs and an output connected to the final drive; a second gear train connected between the second output of the first selection mechanism and the first input of the second selection mechanism, the second gear train being so configured as to selectively provide, in cooperation with the CVT, a second secondary continuous gear ratio between the output of the prime mover and the input of the final drive; and a third gear train connected between the second output of the first selection mechanism and the second input of the second selection mechanism, the third gear train being so configured as to selectively provide, in cooperation with the CVT, a third secondary continuous gear ratio between the output of the prime mover and the input of the final drive. ### Claim 15 A drivetrain for connection to the output of a prime mover and to the input of a final drive therebetween; the drivetrain comprising: a CVT including an input coupled to the output of the prime mover and an output; the CVT being so configured as to provide, between the input and output thereof, a primary continuous range of gear ratios; a gearbox including: a first selection mechanism including an input connected to the output of the CVT and first and second outputs; a second selection mechanism including first and second clutches each having an input connected to a respective output of the first selection mechanism and an first and second outputs; a first gear train connected between the first output of the first clutch and the input of the final drive, the first gear train being so configured as to selectively provide, in cooperation with the CVT, a first secondary continuous gear ratio between the output of the prime mover and the input of the final drive; a second gear train connected between the second output of the first clutch and input of the final drive, the second gear train being so configured as to selectively provide, in cooperation with the CVT, a second secondary continuous gear ratio between the output of the prime mover and the input of the final drive; a third gear train connected between the first output of the second clutch and the input of the final drive, the third gear train being so configured as to selectively provide, in cooperation with the CVT, a third secondary continuous gear ratio between the output of the prime mover and the input of the final drive; and a fourth gear train connected between the second output of the second clutch and the input of the final drive, the third gear train being so configured as to selectively provide, in cooperation with the CVT, a fourth secondary continuous gear ratio between the output of the prime mover and the input of the final drive.