公开(公告)号：US09291260B1

公开(公告)日：2016-03-22

申请号：US14529401

申请日：2014-10-31

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Brandon Fell ,  Craig J. Hawkins

IPC: F16H61/688 ,  F16H61/02 ,  F16H61/16 ,  F16H61/04

CPC classification number: F16H61/0213 ,  F16H61/0403 ,  F16H61/688 ,  F16H2061/0234

Abstract: A method of controlling a downhill rolling shift sequence (DRSS) of a vehicle having an engine and a dual-clutch transmission (DCT) includes initiating a DRSS upon detecting a rolling downhill condition of the vehicle in an initial gear state, identifying an exit gear state corresponding to the initial gear state, shifting the DCT to a rolling neutral state when a speed of an initial gear input shaft is equal to an idle speed of the engine, initiating synchronization of the engine speed with the speed of an exit gear input shaft when the shaft speed is equal to the engine idle speed, and shifting the DCT from the rolling neutral state to the exit gear state when the synchronized speed of the engine and the exit gear input shaft is equal to a calibrated exit speed defined by the exit gear state. A system for controlling the DRSS is provided.

Abstract translation: 一种控制具有发动机和双离合器变速器（DCT）的车辆的下坡滚动换档顺序（DRSS）的方法包括：在初始档位状态下检测到车辆的下坡下坡状态时启动DRSS，识别出口齿轮 状态，当初始齿轮输入轴的速度等于发动机的怠速时，将DCT移动到滚动中立状态，启动发动机转速与出口齿轮输入轴的速度的同步 当轴速度等于发动机怠速时，并且当发动机和出口齿轮输入轴的同步速度等于由出口限定的校准出口速度时，将DCT从滚动中立状态移动到出口齿轮状态 齿轮状态。 提供了一种用于控制DRSS的系统。

公开(公告)号：US20150260238A1

公开(公告)日：2015-09-17

申请号：US14338997

申请日：2014-07-23

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Steven P. Moorman ,  Brandon Fell ,  Mateusz Nowak

IPC: F16D48/02 ,  F16D25/06

CPC classification number: F16D25/14 ,  B60W10/02 ,  B60W20/40 ,  F16D25/06 ,  F16D48/02 ,  F16D48/062 ,  F16D2500/3026 ,  F16D2500/50236 ,  F16D2500/70217 ,  F16D2500/70235 ,  F16D2500/70605

Abstract: A vehicle or other system includes hydraulic fluid, an actuatable device such as a clutch that includes a linear actuator, e.g., a clutch piston. The linear actuator is moveable via a pressure from the fluid to actuate the actuatable device. A position sensor measures and outputs a position of the linear actuator as a position signal. A controller is programmed to generate increasing and decreasing position-to-pressure (PTP) curves via measurement of the position, at a predetermined time, in response to a series of respectively increasing and decreasing pressure step commands. The controller adjusts the PTP curves using a calibrated set of offsets, locates a PTP point in a hysteresis range between the adjusted PTP curves, and controls the device using the PTP point. The offsets may include a temperature of the fluid, velocity of the linear actuator, and/or an engine speed.

Abstract translation: 车辆或其他系统包括液压流体，可致动装置，例如包括线性致动器（例如离合器活塞）的离合器。 线性致动器可以通过来自流体的压力移动以致动可启动装置。 位置传感器测量并输出线性致动器的位置作为位置信号。 控制器被编程为响应于一系列分别增加和减少的压力步骤命令，在预定时间通过测量位置来产生增加和减小的位置压力（PTP）曲线。 控制器使用校准的偏移量调整PTP曲线，将PTP点定位在调整后的PTP曲线之间的滞后范围内，并使用PTP点控制设备。 偏移可以包括流体的温度，线性致动器的速度和/或发动机速度。

公开(公告)号：US09316271B2

公开(公告)日：2016-04-19

申请号：US14338997

申请日：2014-07-23

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Steven P. Moorman ,  Brandon Fell ,  Mateusz Nowak

IPC: B60W10/02 ,  F16D48/02 ,  F16D25/06 ,  B60W20/00

CPC classification number: F16D25/14 ,  B60W10/02 ,  B60W20/40 ,  F16D25/06 ,  F16D48/02 ,  F16D48/062 ,  F16D2500/3026 ,  F16D2500/50236 ,  F16D2500/70217 ,  F16D2500/70235 ,  F16D2500/70605

Abstract: A vehicle or other system includes hydraulic fluid, an actuatable device such as a clutch that includes a linear actuator, e.g., a clutch piston. The linear actuator is moveable via a pressure from the fluid to actuate the actuatable device. A position sensor measures and outputs a position of the linear actuator as a position signal. A controller is programmed to generate increasing and decreasing position-to-pressure (PTP) curves via measurement of the position, at a predetermined time, in response to a series of respectively increasing and decreasing pressure step commands. The controller adjusts the PTP curves using a calibrated set of offsets, locates a PTP point in a hysteresis range between the adjusted PTP curves, and controls the device using the PTP point. The offsets may include a temperature of the fluid, velocity of the linear actuator, and/or an engine speed.

Abstract translation: 车辆或其他系统包括液压流体，可致动装置，例如包括线性致动器（例如离合器活塞）的离合器。 线性致动器可以通过来自流体的压力移动以致动可启动装置。 位置传感器测量并输出线性致动器的位置作为位置信号。 控制器被编程为响应于一系列分别增加和减少的压力步骤命令，在预定时间通过测量位置来产生增加和减小的位置压力（PTP）曲线。 控制器使用校准的偏移量调整PTP曲线，将PTP点定位在调整后的PTP曲线之间的滞后范围内，并使用PTP点控制设备。 偏移可以包括流体的温度，线性致动器的速度和/或发动机速度。