公开(公告)号：US20220212534A1

公开(公告)日：2022-07-07

申请号：US17141597

申请日：2021-01-05

Applicant: GM Global Technology Operations LLC

Inventor： Farzad Samie ,  Madhusudan Raghavan ,  Jian Yao ,  Alireza Fatemi

IPC: B60K6/442 ,  F16H57/02 ,  F16H45/02 ,  B60K6/383 ,  B60K6/365 ,  F16H57/04 ,  H02K7/00 ,  H02K7/10 ,  H02K7/116

Abstract: A hybrid powertrain for an automobile includes a transmission adapted to provide power to wheels of the automobile, an engine adapted to provide power to an input shaft of the transmission, and an electric motor-generator unit adapted to provide power to the input shaft of the transmission, wherein the electric motor-generator is positioned within the transmission, coaxial with the transmission input shaft, the electric motor-generator being supported by and enclosed within a pump support of the transmission.

公开(公告)号：US11236718B1

公开(公告)日：2022-02-01

申请号：US17085168

申请日：2020-10-30

Applicant: GM Global Technology Operations LLC

Inventor： Chunhao J. Lee ,  Chandra S. Namuduri ,  Farzad Samie ,  Lei Hao

IPC: F02N11/08 ,  F02N15/06

Abstract: A pre-engaged piston starter system of an automobile vehicle includes an engine having a flywheel to start the engine connected to the engine by an engine shaft. A starter motor provides rotational energy to a starter gear. A pinion gear transfers rotational energy of the starter gear to the flywheel. A solenoid is energized to shift the pinion gear to an engaged position between the flywheel and the starter gear. An auto-stop mode is entered when an engine speed is decreased below a calibrated threshold speed defining approximately 250 rpm. A calculated pinion pre-engagement engine speed allows engagement of the pinion gear when the engine speed is below the calibrated threshold speed.

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：US10676080B2

公开(公告)日：2020-06-09

申请号：US16126654

申请日：2018-09-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Dongxu Li ,  Norman K. Bucknor ,  Chunhao J. Lee ,  Venkata Prasad Atluri ,  Neeraj Shidore ,  Farzad Samie ,  Derek F. Lahr

IPC: B60W10/02 ,  B60W20/13 ,  B60W20/40 ,  B60W10/06 ,  B60W10/08 ,  B60W30/192

Abstract: Hybrid vehicles and methods of operating the same are disclosed. Example methods may include providing a powertrain for the vehicle, which includes an internal combustion engine configured to provide rotational power to a rotatable input of a transmission by way of a starting device, and an electric motor-generator comprising a rotor configured to selectively provide rotational power to the rotatable input. The method may further include selectively disconnecting the engine from the rotatable input using a disconnect device separate from the starting device, thereby allowing the rotatable input of the transmission to be driven at a speed faster than an output speed of the engine.

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：US10337609B2

公开(公告)日：2019-07-02

申请号：US15289454

申请日：2016-10-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chunhao J Lee ,  Dongxu Li ,  Farzad Samie ,  Chi-kuan Kao ,  Kumar V Hebbale

IPC: F16H61/70 ,  F16H61/662 ,  F16H9/18 ,  F16H59/50 ,  F16H61/12

Abstract: A continuously variable transmission, a transmission control system, and a method is provided. The control system is configured to determine whether a predetermined condition is met for applying a clutch critical pressure to an applied clutch. The clutch critical pressure is less than line pressure and is a pressure at which the clutch may slip upon experiencing a predetermined torque disturbance level. The control system is configured to command the clutch critical pressure to be applied to the clutch if the predetermined condition is met. The control system is further configured to determine whether the clutch is slipping beyond a predetermined threshold, and if the clutch is slipping beyond the predetermined threshold, command a clutch slip control scheme to be applied to the clutch that is configured to bring a clutch slip of the clutch under the predetermined threshold.

公开(公告)号：US20190168731A1

公开(公告)日：2019-06-06

申请号：US15829043

申请日：2017-12-01

Applicant: GM Global Technology Operations LLC

Inventor： Chunhao J. Lee ,  Neeraj S. Shidore ,  Dongxu Li ,  Norman K. Bucknor ,  Farzad Samie ,  Derek F. Lahr

IPC: B60W10/02 ,  B60W20/40

CPC classification number: B60W10/026 ,  B60L15/2054 ,  B60W10/02 ,  B60W10/023 ,  B60W20/40 ,  B60W2510/0208 ,  B60W2710/021 ,  Y10T477/26

Abstract: Presented are engine-disconnect clutches with attendant control logic, methods for making/operating such disconnect clutches, and hybrid electric vehicles (HEV) equipped with an engine that is coupled to/decoupled from a transmission and electric motor via a disconnect clutch. A representative method for controlling an HEV powertrain includes receiving an HEV powertrain operation command, then determining a clutch mode of a multi-mode clutch device to execute the HEV powertrain operation. This multi-mode clutch device is operable in: a lock-lock mode, in which the clutch device transmits torque to and from the engine; a free-free mode, in which the clutch device disconnects the engine's output member from the transmission's input member, preventing torque transmission to and from the engine; a lock-free mode, in which the clutch device transmits torque from but not to the engine; and, a free-lock mode, in which the clutch device transmits torque to but not from the engine.

公开(公告)号：US10295000B2

公开(公告)日：2019-05-21

申请号：US15211646

申请日：2016-07-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Derek F. Lahr ,  Farzad Samie ,  Dongxu Li

IPC: F16D27/10 ,  F16D41/12 ,  F16D41/14 ,  F16D67/06 ,  H02K49/04

Abstract: A mechanical diode to transfer torque between a first torque member and a second torque member is described, and includes a first race element, a second race element and a slide plate that are coaxially disposed in the housing. The slide plate includes a tab element projecting radially outwardly. The slide plate is rotatable to one of a first position and a second position. A spring element is disposed between the slide plate and one of the first and second race elements, and is configured to urge the slide plate to the first position. A controllable braking element is disposed to apply a braking force to the tab element of the slide plate to urge the slide plate to achieve the second position in response to a control signal.

公开(公告)号：US10288159B2

公开(公告)日：2019-05-14

申请号：US15587787

申请日：2017-05-05

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Dongxu Li ,  Farzad Samie

IPC: F16H45/02 ,  F16D21/00 ,  F16D13/40 ,  F16D47/04 ,  F16H45/00 ,  F16D41/12 ,  F16D41/069 ,  F16D41/064

Abstract: Disclosed is a hydrokinetic torque converter (TC) with a TC housing. An impeller is disposed within the TC housing and connects to an engine output shaft. A turbine is disposed within the TC housing and connects to a transmission input shaft via a TC output shaft. A torque converter clutch (TCC), which is disposed within the TC housing and coupled to the TC output shaft, selectively locks the impeller to the TC output shaft. A damper, which is disposed within the TC housing and coupled to the TCC, dampens vibrations transmitted by the TCC. A disconnect device, which is disposed within the TC housing and coupled to the damper assembly and TC output shaft, connects the turbine to the TC output shaft or damper when positive torque is being transferred, and disconnects the turbine and TC output shaft or damper when negative torque is being transferred.

公开(公告)号：US10125866B2

公开(公告)日：2018-11-13

申请号：US15074280

申请日：2016-03-18

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: F16H37/02 ,  F16H61/70 ,  F16H61/664

Abstract: A transmission variator includes a first pulley rotatably attached to an intermediate member of a geartrain, and a second pulley rotatably attached to an output member that is rotatably coupled to the driveline. The geartrain includes an input member, a planetary gear set, a first clutch, a second clutch and an intermediate member. The second clutch is a low drag clutch. The input member rotatably couples to the prime mover. A controller includes an instruction set that is executable to activate only the first clutch in response to a request to operate the driveline in a forward direction, and activate only the second clutch in response to a request to operate the driveline in a reverse direction.