公开(公告)号：US20230166710A1

公开(公告)日：2023-06-01

申请号：US17562169

申请日：2021-12-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Norman K. Bucknor ,  Chunhao J. Lee ,  Dongxu Li ,  Lei Hao ,  Chengwu Duan

IPC: B60W50/06 ,  B60W10/08 ,  B60W10/02 ,  F16H45/02

CPC classification number: B60W50/06 ,  B60W10/08 ,  B60W10/024 ,  F16H45/02 ,  B60W2520/04 ,  B60W2520/105 ,  B60W2540/10 ,  B60W2710/024 ,  B60W2710/081 ,  B60W2710/083 ,  F16H2045/0215

Abstract: A method for controlling an electric drive unit (EDU) having a motor-driven torque converter includes receiving a request signal indicative of a requested output torque of the EDU, and operating the motor at a target motor speed using the requested output torque. The target motor speed minimizes system losses while achieving the requested output torque. When the requested output torque remains below a calibrated threshold and a turbine speed is less than a corner speed of the motor, a torque converter clutch (TCC) transitions to or remains in a locked state. The controller commands the TCC to transition to an unlocked state to reach the target motor speed, thereby selectively enabling torque multiplication. A powertrain system includes a driven load and the EDU. A computer readable storage medium may include executable instructions for performing the method.

公开(公告)号：US11646611B2

公开(公告)日：2023-05-09

申请号：US17387473

申请日：2021-07-28

Applicant: GM Global Technology Operations LLC

Inventor： Jian Yao ,  Chengwu Duan

IPC: H02K1/14 ,  H02K21/24 ,  H02K16/02 ,  H02K1/18

CPC classification number: H02K1/148 ,  H02K1/182 ,  H02K16/02 ,  H02K21/24 ,  H02K1/141 ,  H02K1/16 ,  H02K1/165

Abstract: A stator core assembly for an axial flux electric motor for an automobile includes a cylindrical outer case that defines a central axis, first and second disk shaped insulate frames axially spaced from one another and positioned within the outer case, each of the first and second insulate frames including a circular outer ring, a circular inner ring and a plurality of radial spokes extending between the outer ring and the inner ring and spaced circumferentially about the central axis, and a plurality of segmented core sections extending axially between the first and second insulate frames spaced circumferentially around and supported by the first and second insulate frames, wherein, a radial spoke is positioned between each adjacent pair of segmented core sections, and at least one radial spoke extends across each axial end of each one of the plurality of segmented core sections.

公开(公告)号：US11594929B2

公开(公告)日：2023-02-28

申请号：US16779788

申请日：2020-02-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jian Yao ,  Chengwu Duan ,  Mingyuan Zhang

IPC: H02K3/28 ,  H02K1/18

Abstract: An axial flux motor having reduced spatial harmonics including a rotor with a plurality of magnets. A rotor shaft is coupled to the rotor. A stator faces the rotor and an air gap defined between the rotor and the stator. The stator includes a plurality of electromagnetic components defining a plurality of magnetic poles. The electromagnetic components include a plurality of posts, a plurality of slots, and a plurality of distributed electrically conductive windings disposed in and spanning across nonadjacent slots of the plurality of slots. At least one electrically conductive winding has a winding pitch span of greater than or equal to about 3 to less than or equal to about 20. The axial flux motor may include two rotors and one stator or alternatively two stators and one rotor. Such axial flux motors have short pitch provide desirable reduced spatial harmonics to enhance motor performance.

公开(公告)号：US20230029734A1

公开(公告)日：2023-02-02

申请号：US17387473

申请日：2021-07-28

Applicant: GM Global Technology Operations LLC

Inventor： Jian Yao ,  Chengwu Duan

IPC: H02K1/14 ,  H02K1/18 ,  H02K16/02 ,  H02K21/24

Abstract: A stator core assembly for an axial flux electric motor for an automobile includes a cylindrical outer case that defines a central axis, first and second disk shaped insulate frames axially spaced from one another and positioned within the outer case, each of the first and second insulate frames including a circular outer ring, a circular inner ring and a plurality of radial spokes extending between the outer ring and the inner ring and spaced circumferentially about the central axis, and a plurality of segmented core sections extending axially between the first and second insulate frames spaced circumferentially around and supported by the first and second insulate frames, wherein, a radial spoke is positioned between each adjacent pair of segmented core sections, and at least one radial spoke extends across each axial end of each one of the plurality of segmented core sections.

公开(公告)号：US10941840B2

公开(公告)日：2021-03-09

申请号：US15829259

申请日：2017-12-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jian Yao ,  Chengwu Duan ,  Chunhao J. Lee ,  Derek F. Lahr ,  Farzad Samie

IPC: F16H9/18 ,  F16H61/662 ,  F15B15/12 ,  F16H57/04 ,  F16H63/06 ,  F16H57/12 ,  F16H9/26 ,  F16H61/664 ,  F16H55/56

Abstract: A powertrain has a continuously variable transmission including a shaft rotatable about an axis. The CVT further comprises a variator assembly that includes a pulley supported on the shaft. The pulley has a movable sheave with a ramp surface. The movable sheave is axially movable on the shaft. The variator assembly also includes an endless rotatable device frictionally engaged with the movable sheave. An actuator mechanism includes a wedge component supported on the shaft. The wedge component has a wedge surface that automatically engages the ramp surface when torque on the shaft is in a first direction. The wedge surface applies a wedge force on the ramp surface. The actuator mechanism further includes an actuator that is operatively connected to the movable sheave and is activatable to apply a force on the movable sheave.

公开(公告)号：US10767729B2

公开(公告)日：2020-09-08

申请号：US15750696

申请日：2015-09-16

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chengwu Duan ,  Chi-kuan Kao ,  Jian Yao

IPC: F16G5/18 ,  F16H9/24 ,  F16G13/08 ,  F16H57/00 ,  F16G5/20 ,  F16G1/28 ,  F16G13/06 ,  F16H55/56 ,  F16H55/49 ,  F16G13/04 ,  F16H55/52

Abstract: A number of variations may include a product that may include a linking member that may have links arranged in rows that have multiple pitch lengths. Each of the rows may have at least one link. Each of the multiple pitch lengths may be a discrete length that may be different from others of the multiple pitch lengths. The rows may be arranged along the linking member in a repeating sequence of the multiple pitch lengths.

公开(公告)号：US10651740B1

公开(公告)日：2020-05-12

申请号：US16354279

申请日：2019-03-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mingyuan Zhang ,  Chengwu Duan ,  Lei Hao ,  Jian Yao

IPC: H02M3/158 ,  H02G5/00 ,  H02M7/46

Abstract: An electric drive system for a vehicle may include positive and negative bus rails carrying a direct current (DC) bus voltage, an energy storage system (ESS), a power inverter having a plurality of semiconductor switches operable for inverting the DC bus voltage into an alternating current (AC) bus voltage, and an electric machine. A DC-DC converter may be connected to the bus rails between the capacitor and the power inverter and may include a converter semiconductor switch disposed in the positive bus rail, an inductor coil connected to the positive bus rail and receiving current flowing through the converter semiconductor switch, at least one diode, and a bypass switch connected to the positive bus rail and configured to allow current to bypass the converter. The DC-DC converter may be configured to output a DC bus voltage to the power inverter with a same polarity as the battery polarity.

公开(公告)号：US10473200B2

公开(公告)日：2019-11-12

申请号：US15829287

申请日：2017-12-01

Applicant: GM Global Technology Operations LLC

Inventor： Chengwu Duan ,  Chunhao J. Lee ,  Jian Yao ,  Ying Huang ,  Derek F. Lahr ,  Farzad Samie

IPC: F16H3/54 ,  F16H37/02 ,  F16H25/18 ,  F16H63/06 ,  F16H61/662 ,  F16H61/02 ,  F16H9/24 ,  F16H59/46

Abstract: A continuously variable transmission (CVT) comprises a shaft rotatable about an axis, and variator assembly, and an actuator mechanism. The variator assembly includes a pulley supported on the shaft and having a ramp surface, and an endless rotatable device frictionally engaged with the pulley. The ramp surface inclines in an axial direction along the axis toward the endless rotatable device. The CVT further comprises an actuator mechanism that includes a wedge component that has a wedge surface interfacing with the ramp surface, and a rotary piston operatively connected to the wedge component. The rotary piston defines a first fluid chamber pressurizable to apply a rotational force that provides relative motion between the ramp surface and the wedge surface resulting in a wedge force on the ramp surface and a clamping force of the endless rotatable device on the pulley.

公开(公告)号：US10295056B2

公开(公告)日：2019-05-21

申请号：US15532264

申请日：2014-11-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Ying Huang ,  Chengwu Duan

IPC: F16H61/662 ,  F16G1/28 ,  F16G5/20 ,  F16H9/24 ,  F16H9/18 ,  F16H55/17 ,  F16H55/56 ,  F16H61/00 ,  F16H59/46

Abstract: A vehicle includes a power plant, continuously variable transmission (CVT), drive wheels, sensors, and controller. The CVT achieves a fixed gear/positive engagement and friction drive modes, and includes an input member that receives input torque from the power plant, an output member, and a variator assembly having drive and driven variator pulleys. The pulleys are connected to each other via an endless rotatable drive element, and to a respective one of the input and output members. Pulley actuators change a CVT speed ratio. The controller calculates a relative slip of the pulleys using measured speeds and displacements from the sensors, reduces the relative slip until the relative slip is below a calibrated speed limit or within a calibrated speed range via actuator control signal to the pulley actuators, and commands the fixed gear/positive engagement mode via positive engagement control signals to the CVT until the relative slip reaches zero.

公开(公告)号：US20190032729A1

公开(公告)日：2019-01-31

申请号：US15665350

申请日：2017-07-31

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Zhen Gao ,  Chengwu Duan ,  Jian Yao ,  Chunhao J. Lee

IPC: F16D41/26 ,  B62H5/08 ,  B62M11/16

CPC classification number: F16D41/26 ,  B62H5/00 ,  B62H5/08 ,  B62H5/14 ,  B62M11/00 ,  B62M11/16 ,  F16D41/00

Abstract: Systems and methods are provided for locking a cycle. A clutch system of the cycle includes a forward lock system configured to alternatively prevent or allow operation of the cycle in a forward direction. A shaft extends through the clutch system. An actuator is configured to move the forward lock system along the shaft between a lock position and a free position. A controller is configured to shift the actuator, via a signal from a processor, between the lock position and the free position. The cycle is configured to be locked against forward operation by the clutch system.