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公开(公告)号：US11639748B1
公开(公告)日：2023-05-02
申请号：US17560552
申请日：2021-12-23
发明人： Chengwu Duan , Dongxu Li , Jian Yao , Chunhao J. Lee , Norman K. Bucknor
摘要： An electrified drivetrain system that improves drivability is described. It includes a propulsion system having a rotary electric machine including a rotatable shaft, a torque converter including a fluidic stator, a pump, a turbine and a normally-closed torque converter clutch; a selectable one-way clutch coupled to the fluidic stator; and an output member. The rotatable shaft is coupled to the pump of the torque converter, and the turbine of the torque converter is coupled to the output member.
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公开(公告)号：US20210221353A1
公开(公告)日：2021-07-22
申请号：US16747281
申请日：2020-01-20
摘要： A hybrid electric powertrain for a vehicle includes an engine, electric machine, torque converter having a pump, turbine, and torque converter clutch (“TCC”) configured, when applied, to lock the pump to the turbine, a one-way engine disconnect clutch connected to the turbine, a transmission, and a controller. A transmission input shaft directly couples to the electric machine, and is selectively coupled to the engine via the disconnect clutch. An output shaft is connectable to road wheels of the vehicle. The controller, in response to an engine-off request, determines turbine and pump speeds of the turbine and pump, respectively, registers that the engine is in an engine-off state when the pump speed is less than the turbine speed, and executes an electric vehicle (“EV”) mode shift using machine torque from the electric machine when the pump speed is zero during the engine-off state.
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公开(公告)号：US20210207666A1
公开(公告)日：2021-07-08
申请号：US16734971
申请日：2020-01-06
摘要： A controller executes a method to manage an engine connect/disconnect decision in a powertrain having an engine, transmission, electric machine, and a battery pack and power inverter module (“TPIM”). In response to vehicle ground speed being less than a calibrated maximum electric vehicle accelerator pedal signal (“EVAPS”) level, the controller calculates a delta APS (“ΔPS”) value by subtracting a scaled APS value from the actual APS level. The scaled APS value is a scaled variant of a maximum EVAPS value selected from a maximum EVSAPS table, the latter populated based on inverter temperature, state of charge of the battery pack, and ground speed. When the ΔAPS value exceeds a threshold, the controller connects the engine to the transmission via an engine disconnect clutch. The engine is disconnected based on acceleration of the vehicle and the above-noted factors.
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公开(公告)号：US10900458B2
公开(公告)日：2021-01-26
申请号：US16406658
申请日：2019-05-08
发明人： Suresh Gopalakrishnan , Paul S. Lombardo , David W. Walters , Chunhao J. Lee , Chandra S. Namuduri , Neeraj S. Shidore , Thomas W. Nehl
摘要： A method of stopping an engine crankshaft includes selecting a target angular position at which the engine crankshaft is to be stopped and detecting an actual angular position of the engine crankshaft and a rotational speed of the engine crankshaft. A stopping torque in calculated based on the actual angular position of the engine crankshaft and the rotational speed of the engine crankshaft. The stopping torque is applied to the engine crankshaft via a motor/generator operably connected to the engine crankshaft. The engine crankshaft is stopped at the target angular position via the application of the stopping torque.
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公开(公告)号：US10851882B2
公开(公告)日：2020-12-01
申请号：US16165346
申请日：2018-10-19
发明人： Chunhao J. Lee , Farzad Samie , Derek F. Lahr , Norman K. Bucknor , Dongxu Li
IPC分类号： F16H45/02 , F16H41/24 , F16D41/12 , F16F15/123 , F16D41/04
摘要： A powertrain system includes a flex plate, a transmission input shaft, a torque coupling, a one-way clutch, and a damper assembly. The flex plate is configured to be connected to a crankshaft of an engine. The torque coupling connects the transmission input shaft to the flex plate while allowing slip between the transmission input shaft and the flex plate. The one-way clutch is configured to couple the flex plate to the torque coupling. The damper assembly couples the flex plate to the one-way clutch and is configured to inhibit vibration transmission from the flex plate to the one-way clutch.
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公开(公告)号：US20200079351A1
公开(公告)日：2020-03-12
申请号：US16126654
申请日：2018-09-10
发明人： Dongxu Li , Norman K. Bucknor , Chunhao J. Lee , Venkata Prasad Atluri , Neeraj Shidore , Farzad Samie , Derek F. Lahr
摘要： 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.
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公开(公告)号：US10576837B2
公开(公告)日：2020-03-03
申请号：US16032180
申请日：2018-07-11
发明人： Dongxu Li , Chengwu Duan , Chunhao J. Lee , Lei Hao , Norman K. Bucknor , Michael A. Potter , Farzad Samie
IPC分类号： B60L15/00 , B60W20/15 , B60W10/08 , B60K6/26 , B60W10/02 , B60L50/16 , B60L15/20 , F16H37/08
摘要： An electric drive unit is provided having an electric motor-generator coupled with a torque converter. Vehicles and machines employing the same, as well as methods of using the same, are also disclosed. The motor-generator may be configured to selectively drive a rotatable shaft with a motor output torque and generate electrical power from rotation of the rotatable shaft. The electric drive unit may further include a torque converter having an input and an output separated by a fluid coupling. The fluid coupling may be configured to selectively multiply torque received at the input such that a drive unit output torque at the output is selectively increased in at least a predetermined rotational speed range of the electric motor-generator.
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公开(公告)号：US20200016986A1
公开(公告)日：2020-01-16
申请号：US16032180
申请日：2018-07-11
发明人： Dongxu Li , Chengwu Duan , Chunhao J. Lee , Lei Hao , Norman K. Bucknor , Michael A. Potter , Farzad Samie
摘要： An electric drive unit is provided having an electric motor-generator coupled with a torque converter. Vehicles and machines employing the same, as well as methods of using the same, are also disclosed. The motor-generator may be configured to selectively drive a rotatable shaft with a motor output torque and generate electrical power from rotation of the rotatable shaft. The electric drive unit may further include a torque converter having an input and an output separated by a fluid coupling. The fluid coupling may be configured to selectively multiply torque received at the input such that a drive unit output torque at the output is selectively increased in at least a predetermined rotational speed range of the electric motor-generator.
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9.发明授权公开(公告)号：US10513251B2
公开(公告)日：2019-12-24
申请号：US16444641
申请日：2019-06-18
发明人： Chunhao J. Lee , Neeraj S. Shidore , Dongxu Li , Norman K. Bucknor , Farzad Samie , Derek F. Lahr
摘要： 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.
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公开(公告)号：US10458490B2
公开(公告)日：2019-10-29
申请号：US15665350
申请日：2017-07-31
发明人： Zhen Gao , Chengwu Duan , Jian Yao , Chunhao J. Lee
摘要： 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.
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