US 12,140,210 B2
Continuously variable transmission for electric vehicles
Benoit Boulet, Boucherville (CA); and Abdeslam Medouar, Montreal (CA)
Assigned to THE ROYAL INSTITUTE FOR THE ADVANCEMENT OF LEARNING/MCGILL UNIVERSITY, Montreal (CA)
Appl. No. 18/566,235
Filed by THE ROYAL INSTITUTION FOR THE ADVANCEMENT OF LEARNING/MCGILL UNIVERSITY, Montréal (CA)
PCT Filed Jun. 3, 2022, PCT No. PCT/CA2022/050886
§ 371(c)(1), (2) Date Dec. 1, 2023,
PCT Pub. No. WO2022/251966, PCT Pub. Date Dec. 8, 2022.
Claims priority of provisional application 63/196,962, filed on Jun. 4, 2021.
Prior Publication US 2024/0263687 A1, Aug. 8, 2024
Int. Cl. F16H 3/72 (2006.01); B60W 10/08 (2006.01); B60W 10/101 (2012.01); B60W 30/19 (2012.01); F16H 3/64 (2006.01)
CPC F16H 3/721 (2013.01) [B60W 10/08 (2013.01); B60W 10/101 (2013.01); B60W 30/19 (2013.01); F16H 3/64 (2013.01); B60W 2510/081 (2013.01); B60W 2510/083 (2013.01); B60W 2540/10 (2013.01); B60W 2710/08 (2013.01); B60W 2710/1005 (2013.01); F16H 2200/0021 (2013.01); F16H 2200/2007 (2013.01); F16H 2200/2035 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A continuously-variable transmission (CVT) for an electric vehicle having an electric motor, comprising:
a gearbox having
a first planetary gear train having a first sun gear, first planet gears meshed with the first sun gear and rollingly supported by a first carrier, and a first ring gear meshed with the first planet gears,
a second planetary gear train having a second sun gear, second planet gears meshed with the second sun gear and rollingly supported by a second carrier, and a second ring gear meshed with the second planet gears,
a first rotating spool defined by one of the first sun gear and the second sun gear engaged together, the first carrier and the second carrier engaged together, and the first ring gear and the second ring gear engaged together,
a second rotating spool defined by another one of the first sun gear and the second sun gear engaged together, the first carrier and the second carrier engaged together, and the first ring gear and the second ring gear engaged together,
an input defined by a remaining one of the first sun gear, the first carrier, and the first ring gear, and
an output defined by a remaining one of the second sun gear, the second carrier, and the second ring gear;
a first brake operatively connected to the first rotating spool for selectively blocking rotation of the first rotating spool;
a second brake operatively connected to the second rotating spool for selectively blocking rotation of the second rotating spool; and
a transmission motor drivingly engaged to the first rotating spool or to the second rotating spool.