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公开(公告)号：US20160076643A1
公开(公告)日：2016-03-17
申请号：US14486481
申请日：2014-09-15
IPC分类号： F16H61/12 , F16H63/50 , F16H61/686
CPC分类号： F16H61/12 , F16H59/42 , F16H59/46 , F16H61/686 , F16H2059/465 , F16H2061/1208
摘要： A method for monitoring a fixed-gear transmission includes deriving a node speed relationship for each of the planetary gear sets based upon a center distance and a gear ratio and determining equivalent speed parameters for nodes of the planetary gear sets based upon a transmission input speed state, an intermediate node speed state and a transmission output speed state. A clutch slip speed relationship is determined for each of the clutches based upon the node speed relationships for the planetary gear sets and the equivalent speed parameters for nodes of the planetary gear sets. Rotational speed sensors monitor the input transmission speed, the intermediate node speed and the transmission output speed. A clutch slip speed for each of the clutches is determined based upon the respective clutch slip speed relationship and the monitored input transmission speed, the monitored intermediate node speed and the monitored transmission output speed.
摘要翻译： 用于监测固定齿轮变速器的方法包括基于中心距离和齿轮比导出每个行星齿轮组的节点速度关系，并且基于传动输入速度状态确定行星齿轮组的节点的等效速度参数 ，中间节点速度状态和发送输出速度状态。 基于行星齿轮组的节点速度关系和行星齿轮组的节点的等效速度参数，为每个离合器确定离合器滑差速度关系。 转速传感器监控输入传输速度，中间节点速度和传输输出速度。 基于相应的离合器滑差速度关系和所监视的输入传输速度，所监视的中间节点速度和所监视的传输输出速度来确定每个离合器的离合器滑移速度。
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公开(公告)号：US10174833B2
公开(公告)日：2019-01-08
申请号：US14978333
申请日：2015-12-22
IPC分类号： F16H61/12 , F16H59/14 , F16H59/48 , F16H59/52 , F16H59/54 , F16H61/00 , F16H61/02 , F16H61/16
摘要： A transmission control system of a vehicle includes an estimated acceleration module and a pressure control module. The estimated acceleration module determines an estimated longitudinal acceleration of the vehicle based on a force at axles of the vehicle corresponding to engine torque, a braking force imposed by mechanical brakes of the vehicle, an aerodynamic drag force of the vehicle, and a road load force imposed on the vehicle by contact between tires of the vehicle and a road surface. The pressure control module, when a measured longitudinal acceleration of the vehicle is negative and the estimated longitudinal acceleration is greater than the measured longitudinal acceleration of the vehicle, adjusts transmission fluid pressure applied to one or more clutches of the transmission and shifts the transmission to neutral.
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公开(公告)号：US09797506B2
公开(公告)日：2017-10-24
申请号：US14486481
申请日：2014-09-15
IPC分类号： F16H61/12 , F16H59/46 , F16H61/686 , F16H59/42
CPC分类号： F16H61/12 , F16H59/42 , F16H59/46 , F16H61/686 , F16H2059/465 , F16H2061/1208
摘要： A method for monitoring a fixed-gear transmission includes deriving a node speed relationship for each of the planetary gear sets based upon a center distance and a gear ratio and determining equivalent speed parameters for nodes of the planetary gear sets based upon a transmission input speed state, an intermediate node speed state and a transmission output speed state. A clutch slip speed relationship is determined for each of the clutches based upon the node speed relationships for the planetary gear sets and the equivalent speed parameters for nodes of the planetary gear sets. Rotational speed sensors monitor the input transmission speed, the intermediate node speed and the transmission output speed. A clutch slip speed for each of the clutches is determined based upon the respective clutch slip speed relationship and the monitored input transmission speed, the monitored intermediate node speed and the monitored transmission output speed.
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