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公开(公告)号：US12000478B1
公开(公告)日：2024-06-04
申请号：US18362285
申请日：2023-07-31
申请人： FCA US LLC
发明人： Frank C Thompson, IV
IPC分类号： F16H61/32 , F16H61/664
CPC分类号： F16H61/32 , F16H61/6645 , F16H2061/323
摘要： A method of controlling a four wheel drive (4WD) low range shift in a vehicle is provided. The vehicle has a powertrain including a transmission that drives a transmission output shaft to provide drive torque to a driveline including a power transfer unit (PTU) that delivers torque to front drive wheels and a rear differential unit (RDU) that delivers torque to rear drive wheels. The PTU and RDU are selectively rotatably coupled to each other through a propeller (prop) shaft. The PTU and the RDU are commanded into a neutral position. A clutch at the RDU is commanded to selectively engage to a degree that communicates a desired amount of torque from the prop shaft to the RDU. A determination is made that an output speed of the transmission output shaft is synchronized to match a speed of the RDU and the RDU is commanded to shift into 4WD low.
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公开(公告)号：US11686388B2
公开(公告)日：2023-06-27
申请号：US17684507
申请日：2022-03-02
发明人： Weidong Zhu , Xuefeng Wang , Gang Li
CPC分类号： F16H61/664 , F16H3/76 , F16H59/40 , F16H59/42 , F16H59/70 , F16H59/44 , F16H2059/704 , F16H2061/009 , F16H2061/0096
摘要： A nonlinear closed-loop control combined with an integral time-delay feedback control is disclosed to adjust a speed ratio of an infinitely variable transmission (IVT) system. A speed ratio control for an IVT system involves a forward speed controller and a crank length controller for different speed ranges. The time-delay control is designed to reduce speed fluctuations of the output speed of an IVT with an accurate speed ratio. The speed ratio of an IVT with the disclosed control strategy can achieve an excellent tracking response for the desired constant output speed and reduce speed fluctuations of the output speed of an IVT by the time-delay feedback control.
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公开(公告)号：US20220337118A1
公开(公告)日：2022-10-20
申请号：US17721355
申请日：2022-04-15
发明人： Hiroshi SHIRAI , Tomoki SATO
IPC分类号： H02K5/173 , H02K7/116 , H02K11/215 , F16H15/50 , F16H61/664 , F16H37/12
摘要： One aspect of an electric actuator of the present invention includes: a motor having a motor shaft rotatable about a motor axis; a transmission mechanism coupled to one side in the axial direction of the motor shaft; an output shaft extending in the axial direction of the motor shaft and to which rotation of the motor shaft is transmitted via the transmission mechanism; and a rolling member group including three or more rolling members arranged to surround the motor axis. The motor shaft is a hollow shaft. At least a part of the output shaft is located inside the motor shaft. The motor shaft and the output shaft are supported with each other in the axial direction and the radial direction via the rolling member group.
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公开(公告)号：US11454315B2
公开(公告)日：2022-09-27
申请号：US16643159
申请日：2018-08-21
IPC分类号： F16H59/70 , F16H59/38 , F16H61/664 , F16H63/06 , F16H61/00
摘要： A transmission controller of a toroidal continuously variable transmission includes a gain setting unit that adjusts a gain of closed-loop control for calculating a target value of a roller position in accordance with a change in a rotation speed of a disc in a first rotation speed range and a second rotation speed range higher than the first rotation speed range. The gain setting unit changes, in the first rotation speed range, the gain so that sensitivity of the closed-loop control decreases with an increase in the rotation speed, and changes, in the second rotation speed range, the gain so that a rate of decrease in the sensitivity of the closed-loop control with the increase in the rotation speed is smaller than that in the first rotation speed range.
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公开(公告)号：US11447264B2
公开(公告)日：2022-09-20
申请号：US17286883
申请日：2019-10-21
IPC分类号： B64D41/00 , B64D31/06 , B64D31/14 , F16H15/38 , F16H59/72 , F16H61/664 , H02P9/06 , B64C19/00 , F04C14/22 , H02P101/25 , H02P101/30 , B60W50/00
摘要： A power generation controller of an aircraft includes a low-temperature start-up control section and a power generation control section. When it is determined that an oil temperature of a hydraulic actuator configured to change an operation position of a speed change element of a hydraulic transmission satisfies a predetermined low-temperature condition when starting up an aircraft engine, the low-temperature start-up control section sets a power generator to a power non-generating state and controls the hydraulic actuator such that the speed change element is positioned at an acceleration side of a median in a speed change range. When it is determined that the oil temperature satisfies a predetermined low-temperature start-up completion condition, the power generation control section sets the power generator to a power generating state and controls the hydraulic actuator in accordance with a rotational frequency of the aircraft engine.
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公开(公告)号：US20220252151A1
公开(公告)日：2022-08-11
申请号：US17723805
申请日：2022-04-19
发明人： Weidong ZHU , Gang LI , Meilin YU , Xuefeng WANG
IPC分类号： F16H61/664 , F16H59/40 , F16H59/42 , F16H3/76 , F16H59/70
摘要： A tidal current energy converter including an infinitely variable transmission (IVT) control system and a hybrid vertical axis wind (or water) turbine (VAWTs) apparatus. The hybrid VAWT apparatus includes a modified-Savonius (MS) rotor in the central region and a straight bladed H-type Darrieus rotor in the surrounding annular region. The IVT control system includes a nonlinear closed-loop control combined with an integral time-delay feedback control to adjust a speed ratio of the IVT. A speed ratio control for an IVT system involves a forward speed controller and/or a crank length controller for different speed ranges. The time-delay control is designed to reduce speed fluctuations of the output speed of an IVT with an accurate speed ratio. The speed ratio of an IVT with the disclosed control strategy can achieve an excellent tracking response for the desired constant output speed and reduce speed fluctuations of the output speed of an IVT by the time-delay feedback control.
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公开(公告)号：US20220243794A1
公开(公告)日：2022-08-04
申请号：US17726245
申请日：2022-04-21
申请人： Deere & Company
发明人： Norbert Fritz , Rainer Gugel , David Mueller
IPC分类号： F16H37/04 , F16H61/664 , F16H63/08 , B60K25/06
摘要： A method controls a power split transmission structure to direct drive power from a drive through at least three interfaces to at least one output to supply connected consumers. The transmission structure has at least two variator paths each comprising a summation gearbox downstream of the interfaces in which drive power is varied via a mechanical and an electrical path. The transmission structure has power electronics or a hydraulic control device including at least three electric or hydraulic machines arranged in parallel with the summation gearbox of each variator path downstream of the interfaces. The method simultaneously controls the power electronics or a hydraulic control device and the electric or hydraulic machines in such a way that fluctuations in the power supply to the consumers are compensated for by the electric or hydraulic machines by regulating, via a control device, the summation gearbox of each of the variator paths and modifying a torque, a speed, or both, of the drive power via the power electronics system or the hydraulic control device.
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公开(公告)号：US11261957B2
公开(公告)日：2022-03-01
申请号：US13515748
申请日：2010-12-13
申请人： Michael P. Bujold
发明人： Michael P. Bujold
IPC分类号： B60W10/108 , F16H59/14 , F16H15/50 , B60W10/06 , F16H61/04 , F16H37/02 , F16H59/18 , F16H59/36 , F16H63/50 , F16H61/664
摘要： Systems and methods for operating a driveline system are disclosed and include a step-variable transmission. A continuously variable transmission (CVT) is coupled between an input source and the step-variable transmission. The CVT receives a first torque from the input source and outputs a second torque. The CVT has a plurality of planetary members in rolling contact with an inner race and an outer race. A radial distance between the planetary members and a drive-transmitting member corresponds to a transmission ratio of the CVT.
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公开(公告)号：US20210380270A1
公开(公告)日：2021-12-09
申请号：US17286883
申请日：2019-10-21
摘要： A power generation controller of an aircraft includes a low-temperature start-up control section and a power generation control section. When it is determined that an oil temperature of a hydraulic actuator configured to change an operation position of a speed change element of a hydraulic transmission satisfies a predetermined low-temperature condition when starting up an aircraft engine, the low-temperature start-up control section sets a power generator to a power non-generating state and controls the hydraulic actuator such that the speed change element is positioned at an acceleration side of a median in a speed change range. When it is determined that the oil temperature satisfies a predetermined low-temperature start-up completion condition, the power generation control section sets the power generator to a power generating state and controls the hydraulic actuator in accordance with a rotational frequency of the aircraft engine.
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公开(公告)号：US20210324955A1
公开(公告)日：2021-10-21
申请号：US17232225
申请日：2021-04-16
发明人： Weidong ZHU , Xuefeng WANG , Gang LI
摘要： A nonlinear closed-loop control combined with an integral time-delay feedback control is disclosed to adjust a speed ratio of an infinitely variable transmission (IVT) system. A speed ratio control for an IVT system involves a forward speed controller and a crank length controller for different speed ranges. The time-delay control is designed to reduce speed fluctuations of the output speed of an IVT with an accurate speed ratio. The speed ratio of an IVT with the disclosed control strategy can achieve an excellent tracking response for the desired constant output speed and reduce speed fluctuations of the output speed of an IVT by the time-delay feedback control.
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