-
公开(公告)号：US09482339B2
公开(公告)日：2016-11-01
申请号：US14640744
申请日：2015-03-06
发明人： Paul G. Otanez , Zhen J. Zhang
IPC分类号： F16H61/662 , F16H9/16
CPC分类号： F16H9/16 , F16H61/66259
摘要： A continuously variable transmission (CVT) includes input and output members, a primary variator pulley, and a secondary variator pulley. The respective variator pulleys are responsive to primary and secondary pressures. Speed sensors measure a respective rotational speed of each variator pulley. A controller executes a method by receiving the measured rotational speeds, calculating a current speed ratio of the CVT above a threshold CVT speed ratio using the rotational speeds, comparing the calculated current speed ratio to calibrated threshold ratios during a sudden stop event of the vehicle, and selectively executing a CVT control action after the calculated current speed ratio drops below the threshold CVT speed ratio during the sudden stop event. The control action depends on which of the threshold ratios is exceeded by the calculated current speed ratio after the calculated current speed ratio drops below the threshold CVT speed ratio, and on the measured rotational speeds.
摘要翻译： 无级变速器（CVT）包括输入和输出构件，主变速器滑轮和次级变速器滑轮。 相应的变速器滑轮响应于初级和次级压力。 速度传感器测量每个变速轮的相应转速。 控制器通过接收测量的旋转速度来执行方法，使用转速将CVT的当前速度比计算到阈值CVT速度比以上，将计算出的当前速度比与在车辆的突然停止事件期间的校准阈值比进行比较， 并且在突然停止事件之后，计算出的当前速度比下降到阈值CVT速度比之前选择性地执行CVT控制动作。 控制动作取决于在计算出的当前速度比下降到低于阈值CVT速度比之后计算的当前速度比超过阈值比率以及所测量的转速。
-
公开(公告)号：US09151382B2
公开(公告)日：2015-10-06
申请号：US14187365
申请日：2014-02-24
发明人： Zhen J. Zhang , Jesse B. Bradley , Jing Zhou , John E. Marano
IPC分类号： F16H61/12 , F16H61/662 , B60W10/107
CPC分类号： F16H61/66272 , B60W10/107 , F16H61/12 , F16H61/66259 , F16H2061/66277 , F16H2061/66295 , Y10T477/6237
摘要： A vehicle includes an engine, drive wheels, a continuously variable transmission (CVT), and a controller. The CVT includes an input member connected to the engine, an output member delivering output torque to the wheels, and a variator assembly connecting the input and output members. The controller determines, via a method, an input and output speed of the variator assembly, converts the output speed to an equivalent input speed using a calibrated variator speed ratio, and calculates a gross slip of the variator assembly using the input and equivalent input speeds. A gross slip flag is set only when the gross slip exceeds a calibrated slip value for a predetermined duration. A CVT assembly includes the controller, input and output members, and variator assembly. The variator assembly may include drive and driven pulleys, a drive mechanism connecting the pulleys, and an actuator applying a clamping force to one of the pulleys.
摘要翻译： 车辆包括发动机，驱动轮，无级变速器（CVT）和控制器。 CVT包括连接到发动机的输入构件，向车轮输出扭矩的输出构件以及连接输入和输出构件的变速组件。 控制器通过方法确定变换器组件的输入和输出速度，使用校准的变速器速比将输出速度转换为等效输入速度，并使用输入和等效输入速度计算变速组件的总滑动 。 只有当毛滑差超过预定持续时间的校准滑差值时，才设置毛滑标志。 CVT组件包括控制器，输入和输出构件以及变速器组件。 变速器组件可以包括驱动和从动皮带轮，连接皮带轮的驱动机构和向其中一个滑轮施加夹紧力的致动器。
-
公开(公告)号：US09851004B2
公开(公告)日：2017-12-26
申请号：US14290106
申请日：2014-05-29
IPC分类号： F16H61/662 , F16H9/12
CPC分类号： F16H61/66272 , F16H9/125 , F16H2061/66218 , F16H2061/66277
摘要： A method of controlling a variator that requires clamping pressure between a first component and a second component to transfer torque therebetween, such as a continuously variable transmission, includes calculating a theoretical clamping pressure, and multiplying the theoretical clamping pressure by a multiplier to define a commanded clamping pressure. The multiplier includes a value that is variable between a minimum multiplier value and a maximum multiplier value. The value of the multiplier is based on current operating conditions of the variator. The commanded clamping pressure is applied to the first component and the second component to generate friction and transfer torque between the first component and the second component.
-
公开(公告)号：US20170130836A1
公开(公告)日：2017-05-11
申请号：US14935580
申请日：2015-11-09
IPC分类号： F16H61/662
CPC分类号： F16H61/66272 , F16H2061/0078 , F16H2061/66277
摘要： A powertrain system including a continuously variable transmission (CVT) is described. A method for controlling the CVT includes determining a target clamping pressure and an actual clamping pressure, and determining a proportional correction term and an integral correction term based upon the target clamping pressure and the actual clamping pressure. An adapt correction term is determined based upon the target clamping pressure and a temperature of the CVT. A commanded clamping pressure for controlling the CVT is determined based upon the proportional correction term, the integral correction term and the adapt correction term. A pressure command is employed to drive an actuator of a moveable sheave of a pulley of a variator of the CVT based upon the commanded clamping pressure.
-
公开(公告)号：US20170130834A1
公开(公告)日：2017-05-11
申请号：US14935574
申请日：2015-11-09
发明人： Zhen J. Zhang , Paul G. Otanez , Shushan Bai
IPC分类号： F16H61/662 , F16H9/18
CPC分类号： F16H61/66272 , F16H9/18 , F16H59/44
摘要： A powertrain system including an internal combustion engine rotatably coupled to a variator of a continuously variable transmission (CVT) is described. A method for controlling the CVT includes determining an actual speed ratio, a desired speed ratio and a commanded speed ratio. A total speed ratio change rate is determined based upon the actual speed ratio, the desired speed ratio and the commanded speed ratio, and a commanded speed ratio trajectory is determined based upon the desired speed ratio and the commanded speed ratio. A ratio change coefficient and a force ratio factor are determined based upon the commanded speed ratio trajectory, and a shift force is determined based upon the total speed ratio change rate and the ratio change coefficient. A primary pulley force and a secondary pulley force for the CVT are controlled based upon the shift force and the force ratio factor.
-
公开(公告)号：US20150345631A1
公开(公告)日：2015-12-03
申请号：US14290106
申请日：2014-05-29
IPC分类号： F16H61/662 , F16H9/12
CPC分类号： F16H61/66272 , F16H9/125 , F16H2061/66218 , F16H2061/66277
摘要： A method of controlling a variator that requires clamping pressure between a first component and a second component to transfer torque therebetween, such as a continuously variable transmission, includes calculating a theoretical clamping pressure, and multiplying the theoretical clamping pressure by a multiplier to define a commanded clamping pressure. The multiplier includes a value that is variable between a minimum multiplier value and a maximum multiplier value. The value of the multiplier is based on current operating conditions of the variator. The commanded clamping pressure is applied to the first component and the second component to generate friction and transfer torque between the first component and the second component.
摘要翻译： 一种控制需要在第一部件和第二部件之间传递扭矩的变速器（例如无级变速器）的变换器的方法包括计算理论夹紧压力，并将理论夹紧压力乘以乘数以限定所命令的 夹紧压力。 乘数包括在最小乘数值和最大乘数值之间变化的值。 乘数的值基于变换器的当前操作条件。 指令的夹紧压力被施加到第一部件和第二部件，以在第一部件和第二部件之间产生摩擦和传递扭矩。
-
公开(公告)号：US20140011626A1
公开(公告)日：2014-01-09
申请号：US14022924
申请日：2013-09-10
IPC分类号： F16H3/62
CPC分类号： F16H3/62 , F16H3/66 , F16H61/06 , F16H2200/006 , F16H2200/2012 , F16H2200/2043 , Y10T74/19219
摘要： A transmission includes an input member, an output member, a plurality of torque-transmitting mechanisms that are selectively engageable to establish at least eight forward speed ratios and at least one reverse speed ratio between the input member and the output member, and one or more latches associated with one or more of the torque-transmitting mechanisms. The one or more latches engages the respective torque-transmitting mechanisms during or prior to a start event.
摘要翻译： 变速器包括输入构件，输出构件，多个扭矩传递机构，其可选择性地接合以在输入构件和输出构件之间建立至少八个前进速度比和至少一个倒档比，以及一个或多个 与一个或多个扭矩传递机构相关联的闩锁。 一个或多个闩锁在启动事件期间或之前与相应的扭矩传递机构接合。
-
公开(公告)号：US20240159280A1
公开(公告)日：2024-05-16
申请号：US17984471
申请日：2022-11-10
发明人： Dongxu Li , Michael Ding , Bryan John Williams , Chunhao J. Lee , Zhen J. Zhang
IPC分类号： F16D48/06
CPC分类号： F16D48/066 , F16D2500/102 , F16D2500/3024 , F16D2500/3065 , F16D2500/3067 , F16D2500/30806
摘要： A vehicle includes a transmission that performs a method of operating a clutch of a vehicle. The vehicle includes the clutch, an actuator device and a processor. The actuator device includes a piston movable to operate the clutch. The processor is configured to receive a pressure signal indicative of a selected fluid pressure for operating the clutch, determine a position for the piston in the actuator device from the pressure signal, and move the piston to the position to operate the clutch at the selected fluid pressure.
-
公开(公告)号：US10145470B2
公开(公告)日：2018-12-04
申请号：US15019463
申请日：2016-02-09
发明人： Zhen J. Zhang , Paul G. Otanez
IPC分类号： F16H61/662
摘要： A continuously variable transmission (CVT) for use with a torque generating mechanism includes an input member connectable to the torque generating mechanism, an output member, a variator assembly, and a controller. The controller is programmed to control a change-of-mind shift of the CVT requesting a transition from an initially-requested shift to a next-requested shift before completion of the initially-requested shift. Additionally, the controller is programmed to execute a method by detecting the change-of-mind shift, determining an acceleration profile of the input member for the change-of-mind shift using a calibration map indexed by a starting and target ratio of the variator assembly, and calculating a required ratio of the input and output pulleys using the acceleration profile. The controller then commands a clamping pressure of the variator assembly to thereby achieve the calculated required ratio. A vehicle includes an engine and the CVT noted above.
-
公开(公告)号：US09765884B2
公开(公告)日：2017-09-19
申请号：US14935574
申请日：2015-11-09
发明人： Zhen J. Zhang , Paul G. Otanez , Shushan Bai
IPC分类号： F16H61/662 , F16H9/18
CPC分类号： F16H61/66272 , F16H9/18 , F16H59/44
摘要： A powertrain system including an internal combustion engine rotatably coupled to a variator of a continuously variable transmission (CVT) is described. A method for controlling the CVT includes determining an actual speed ratio, a desired speed ratio and a commanded speed ratio. A total speed ratio change rate is determined based upon the actual speed ratio, the desired speed ratio and the commanded speed ratio, and a commanded speed ratio trajectory is determined based upon the desired speed ratio and the commanded speed ratio. A ratio change coefficient and a force ratio factor are determined based upon the commanded speed ratio trajectory, and a shift force is determined based upon the total speed ratio change rate and the ratio change coefficient. A primary pulley force and a secondary pulley force for the CVT are controlled based upon the shift force and the force ratio factor.
-
-
-
-
-
-
-
-
-
搜索结果
24 条记录 (耗时 0.018 秒)
