公开(公告)号：US10047860B2

公开(公告)日：2018-08-14

申请号：US15171110

申请日：2016-06-02

Applicant: GM Global Technology Operations LLC

Inventor： Minh Q. Truong ,  Bret M. Olson ,  Chinar S. Ghike ,  Craig J. Hawkins ,  Steven P. Moorman ,  Paul G. Otanez

IPC: F16H59/00 ,  F16H61/00 ,  F16H63/00 ,  F16H61/662 ,  F16H59/18

Abstract: A target module determines a target ratio between a speed of an input shaft and a speed of an output shaft of a continuously variable transmission (CVT) based on an accelerator pedal position. A maximum rate of change (ROC) module determines a maximum ROC of the target ratio. A switching valve control module, based on a comparison of the maximum ROC and a ROC of the target ratio, selectively actuates a switching valve of the CVT one of (i) from a closed position to an open position and (ii) from the open position to the closed position. The switching valve prevents transmission fluid flow through a flow path between a transmission fluid pump and a pressure regulator valve of the CVT when the switching valve is in the closed position. The switching valve allows transmission fluid flow through the flow path when the switching valve is in the open position.

公开(公告)号：US09970540B2

公开(公告)日：2018-05-15

申请号：US15171016

申请日：2016-06-02

Applicant: GM Global Technology Operations LLC

Inventor： Minh Q. Truong ,  Bret M. Olson ,  Steven P. Moorman ,  Mohamed O. Egal

IPC: F16H59/00 ,  F16H61/00 ,  F16H63/00 ,  F16H61/662

CPC classification number: F16H61/66272 ,  F16H61/0021

Abstract: A switching valve control module selectively actuates a switching valve of a continuously variable transmission (CVT) either: (i) from a closed position to an open position; or (ii) from the open position to the closed position. The switching valve prevents and allows transmission fluid flow through a flow path between a transmission fluid pump and a pressure regulator valve of the CVT when the switching valve is in the closed position and the open position, respectively. An adjustment determination module determines a pressure adjustment when the switching valve actuates. A target pressure module determines a target pressure output from the pressure regulator valve. An adjusting module determines an adjusted target pressure based on the pressure adjustment and the target pressure. A regulator valve control module controls opening of the pressure regulator valve based on the adjusted target pressure.

公开(公告)号：US09605755B2

公开(公告)日：2017-03-28

申请号：US14549584

申请日：2014-11-21

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Glenn W. Hoefflin ,  Minh Q. Truong ,  Christopher Jay Weingartz

IPC: F16H61/30 ,  F16H63/30 ,  F16H61/28

CPC classification number: F16H61/30 ,  F16H63/30 ,  F16H63/3023 ,  F16H2061/2823 ,  F16H2063/3093

Abstract: A method and system for controlling movement of an actuator fork of a transmission through a pre-synchronization phase of a synchronization event at a pre-synchronization fork velocity includes adjusting the level of fluid pressure applied to an actuator operatively attached to the actuator fork to control the pre-synchronization fork velocity within a predetermined range of a velocity target. The method determines, via a controller, the fork velocity during the pre-synchronization phase of a current synchronization event, compares the determined fork velocity to a velocity target, and adjusts the pressure level of fluid applied to an actuator piston of the actuator to control the velocity of the actuator fork within a predetermined range defined by the velocity target during a subsequent pre-synchronization phase. The velocity target may be defined for a shift type, such as a fast or slow shift, where the shift type is determined by the controller.

公开(公告)号：US20160146341A1

公开(公告)日：2016-05-26

申请号：US14549584

申请日：2014-11-21

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Glenn W. Hoefflin ,  Minh Q. Truong ,  Christopher Jay Weingartz

IPC: F16H61/30

CPC classification number: F16H61/30 ,  F16H63/30 ,  F16H63/3023 ,  F16H2061/2823 ,  F16H2063/3093

Abstract: A method and system for controlling movement of an actuator fork of a transmission through a pre-synchronization phase of a synchronization event at a pre-synchronization fork velocity includes adjusting the level of fluid pressure applied to an actuator operatively attached to the actuator fork to control the pre-synchronization fork velocity within a predetermined range of a velocity target. The method determines, via a controller, the fork velocity during the pre-synchronization phase of a current synchronization event, compares the determined fork velocity to a velocity target, and adjusts the pressure level of fluid applied to an actuator piston of the actuator to control the velocity of the actuator fork within a predetermined range defined by the velocity target during a subsequent pre-synchronization phase. The velocity target may be defined for a shift type, such as a fast or slow shift, where the shift type is determined by the controller.

Abstract translation: 用于通过预同步叉速度的同步事件的预同步阶段来控制变速器的执行器叉的运动的方法和系统包括调节施加到可操作地附接到致动器叉的致动器的流体压力的水平以控制 预速同步叉速度在速度目标的预定范围内。 该方法通过控制器确定在当前同步事件的预同步阶段期间的叉速度，将确定的叉速度与速度目标进行比较，并且调节施加到致动器的致动器活塞的流体的压力水平以控制 在随后的预同步阶段期间，致动器叉的速度在由速度目标限定的预定范围内。 速度目标可以针对移位类型来定义，例如快速或慢速移位，其中移位类型由控制器确定。