公开(公告)号：US08977454B2

公开(公告)日：2015-03-10

申请号：US13889097

申请日：2013-05-07

Applicant: Caterpillar Inc.

Inventor： Scott A. Tipton ,  James W. Landes ,  Justin L. Steinlage

IPC: G06F7/00 ,  F16H61/68

CPC classification number: F16H61/68 ,  F16H61/0213 ,  F16H61/10 ,  F16H2059/663 ,  F16H2061/0234 ,  Y10T477/65 ,  Y10T477/692 ,  Y10T477/6934

Abstract: A system and method are provided for grade-based anti-hunt shift control of an automatic transmission powering a machine. A shift controller determines a recommended gear in which to operate the transmission and sets an anti-hunt timer upon recommending a shift from a first gear to a second gear. The anti-hunt timer prevents a subsequent shift back to the first gear while the anti-hunt timer is running. A grade-based controller is configured to track machine operation and to determine when the machine operational factors change such that an estimated steady state gear differs from the second gear. When such a change is encountered, the grade-based controller clears the anti-hunt timer and sets a secondary timer. The clearing of the anti-hunt timer allows a downshift to accommodate the detected grade while the setting of the secondary timer prevents a subsequent clearing of the anti-hunt timer while the secondary timer is running.

Abstract translation: 提供一种系统和方法，用于为机器供电的自动变速器的基于级别的反向移动控制。 变速控制器确定在其中操作变速器的推荐齿轮，并且在推荐从第一档位到第二档位的换档时设置防止定时器。 防狩定时器在防狩定时器运行的同时防止随后的换档回到第一档。 基于等级的控制器被配置为跟踪机器操作并且确定机器操作因素何时改变，使得估计的稳态齿轮与第二档不同。 当遇到这种变化时，基于等级的控制器清除防狩定时器并设置辅助计时器。 反向寻线定时器的清除允许降档适应检测到的等级，而次计时器的设置可防止次计时器运行时反狩定时器的后续清除。

公开(公告)号：US20140336889A1

公开(公告)日：2014-11-13

申请号：US13889097

申请日：2013-05-07

Applicant: CATERPILLAR INC.

Inventor： Scott A. Tipton ,  James W. Landes ,  Justin L. Steinlage

IPC: F16H61/68

CPC classification number: F16H61/68 ,  F16H61/0213 ,  F16H61/10 ,  F16H2059/663 ,  F16H2061/0234 ,  Y10T477/65 ,  Y10T477/692 ,  Y10T477/6934

Abstract: A system and method are provided for grade-based anti-hunt shift control of an automatic transmission powering a machine. A shift controller determines a recommended gear in which to operate the transmission and sets an anti-hunt timer upon recommending a shift from a first gear to a second gear. The anti-hunt timer prevents a subsequent shift back to the first gear while the anti-hunt timer is running. A grade-based controller is configured to track machine operation and to determine when the machine operational factors change such that an estimated steady state gear differs from the second gear. When such a change is encountered, the grade-based controller clears the anti-hunt timer and sets a secondary timer. The clearing of the anti-hunt timer allows a downshift to accommodate the detected grade while the setting of the secondary timer prevents a subsequent clearing of the anti-hunt timer while the secondary timer is running.

Abstract translation: 提供一种系统和方法，用于为机器供电的自动变速器的基于级别的反向移动控制。 变速控制器确定在其中操作变速器的推荐齿轮，并且在推荐从第一档位到第二档位的换档时设置防止定时器。 防狩定时器在防狩定时器运行的同时防止随后的换档回到第一档。 基于等级的控制器被配置为跟踪机器操作并且确定机器操作因素何时改变，使得估计的稳态齿轮与第二档不同。 当遇到这种变化时，基于等级的控制器清除防狩定时器并设置辅助计时器。 反向寻线定时器的清除允许降档适应检测到的等级，而次计时器的设置可防止次计时器运行时反狩定时器的后续清除。