# US 10,369,876 B2 · Power train with a variable-speed transmission and motor vehicle of hybrid type using such a power train > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,369,876 B2 - Document ID: US10369876B2 - Status: Granted - Kind: B2 - Application number: 15/523,075 - Filed: 2015-08-11 - Published: 2017-11-16 - Granted: 2019-08-06 - Earliest claimed: 2014-10-29 - Assignees: Ifp Energies Nouvelles - Applicants: IFP Energies nouvelles - Inventors: Misa Milosavljevic - Web page: https://patentgrep.com/patent/US10369876B2 ## CPC - B60K 6/365: with the gears having orbital motion - B60K 6/383: One-way clutches or freewheel devices - B60K 6/387: Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means - B60K 6/48: Parallel type - F16H 3/725: {with means to change ratio in the mechanical gearing} - B60K 2006/4816: {Electric machine connected or connectable to gearbox internal shaft} - B60K 2006/4833: {Step up or reduction gearing driving generator, e.g. to operate generator in most efficient speed range} - F16H 2200/0021: specially adapted for electric vehicles - F16H 2200/2007: with two sets of orbital gears - F16H 2200/2082: one freewheel mechanisms - F16H 2200/2084: two freewheel mechanisms - F16H 2200/2094: using positive clutches, e.g. dog clutches - Y02T 10/62: Hybrid vehicles - Y10S 903/911: with two or more gear sets - Y10S 903/913: One way - Y10S 903/914: Actuated, e.g. engaged or disengaged by electrical, hydraulic or mechanical means - Y10S 903/919: Stepped shift - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - F16H: GEARING - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract The present invention relates to a powertrain for a motor vehicle comprising a thermal engine (10), a variable-speed transmission device (14) including an engine epicyclic gear train (26) with a sun gear (36) carried by a hollow shaft (42) and a crown gear (56) carried by a hollow shaft (62) surrounding hollow shaft (42) of the sun gear, the sun gear and the crown gear are each connected to shaft (12) of thermal engine (10) respectively by a controlled clutch (28 and a second controlled clutch 30) and to a fixed part (48) of the vehicle by a one-way clutch (32 and 34), and a track (126 and 128) for motion transmission to a drive axle (16). According to the invention, the powertrain comprises in addition to the first and second controlled clutches a controlled connection (132) between the two hollow shafts (42 and 62). ## Claims ### Claim 1 A powertrain for a motor vehicle comprising: a thermal engine and a variable-speed transmission including an engine epicyclic gear train having a sun gear carried by a hollow shaft and a crown gear which is carried by a hollow shaft that surrounds the hollow shaft carrying the sun gear; and wherein the sun gear and the crown gear are each connected to a shaft of the thermal engine respectively by a first controlled clutch and a second controlled clutch and to a fixed part of the vehicle by a one-way clutch, and further including a track transmission for transmission of motion to a drive axle including a controlled connection between the hollow shafts while the first and second controlled clutches are not active. ### Claim 2 (depends on 1) A powertrain as claimed in claim 1, wherein: the controlled connection comprises at least one radial pad housed in a wall of the gear shaft carrying the sun gear which cooperates with the shaft carrying the crown gear. ### Claim 3 (depends on 2) A powertrain as claimed in claim 2, wherein: the pad has an upper end having a surface comprising a friction material for connection to the shaft carrying the crown gear. ### Claim 4 (depends on 2) A powertrain as claimed in claim 2, wherein: the pad is housed in a radial bore extending through the wall of the shaft carrying the sun gear and opens into a hollow chamber of the shaft carrying the crown gear. ### Claim 5 (depends on 3) A powertrain as claimed in claim 3, wherein: the pad is housed in a radial bore extending through the wall of the shaft carrying the sun gear and opens into a hollow chamber of the shaft carrying the crown gear. ### Claim 6 (depends on 4) A powertrain as claimed in claim 4, wherein: the hollow chamber is limited by at least part of the wall of the shaft carrying the sun gear and two transverse partitions. ### Claim 7 (depends on 5) A powertrain as claimed in claim 5, wherein: the hollow chamber is limited by at least part of the wall of the shaft carrying the sun gear and two transverse partitions. ### Claim 8 (depends on 4) A powertrain as claimed in claim 4, wherein: the chamber is connected to a pressurizing device. ### Claim 9 (depends on 5) A powertrain as claimed in claim 5, wherein: the chamber is connected to a pressurizing device. ### Claim 10 (depends on 6) A powertrain as claimed in claim 6, wherein: the chamber is connected to a pressurizing device. ### Claim 11 (depends on 7) A powertrain as claimed in claim 7, wherein: the chamber is connected to a pressurizing device. ### Claim 12 (depends on 8) A powertrain as claimed in claim 8, wherein: the pressurizing device comprises a delivery line for feeding a fluid to the hollow chamber and a pressuring device. ### Claim 13 (depends on 9) A powertrain as claimed in claim 9, wherein: the pressurizing device comprises a delivery line for feeding a fluid to the hollow chamber and a pressuring device. ### Claim 14 (depends on 10) A powertrain as claimed in claim 10, wherein: the pressurizing device comprises a delivery line for feeding a fluid to the hollow chamber and a pressuring device. ### Claim 15 (depends on 11) A powertrain as claimed in claim 11, wherein: the pressurizing device comprises a delivery line for feeding a fluid to the hollow chamber and a pressuring device. ### Claim 16 (depends on 12) A powertrain as claimed in claim 12, wherein: the pressuring device comprises a piston and a control for controlling the piston. ### Claim 17 (depends on 13) A powertrain as claimed in claim 13, wherein: the pressuring device comprises a piston and a control for controlling the piston. ### Claim 18 (depends on 14) A powertrain as claimed in claim 14, wherein: the pressuring device comprises a piston and a control for controlling the piston. ### Claim 19 (depends on 15) A powertrain as claimed in claim 15, wherein: the pressuring device comprises a piston and a control for controlling the piston. ### Claim 20 (depends on 12) A powertrain as claimed in claim 12, wherein the fluid is lubricating oil.