Method and apparatus for controlling manual downshifting in an automatic
transmission
    1.
    发明授权
    Method and apparatus for controlling manual downshifting in an automatic transmission 失效
    用于控制自动变速器中的手动降档的方法和装置

    公开(公告)号:US5305657A

    公开(公告)日:1994-04-26

    申请号:US881279

    申请日:1992-05-11

    摘要: An apparatus is provided for use in a vehicle having an engine driven transmission which includes a plurality of gear ratios. The apparatus includes a sensor adapted to sense a parameter indicative of vehicle speed and responsively produce a vehicle speed signal. A downshift switch is provided to controllably produce a downshift signal. An engine speed sensor senses engine speed and responsively produces an engine speed signal. A controller is adapted to receive the vehicle speed, engine speed, and downshift signals, process the vehicle speed signal to produce a transmission control signal, produce a down shift enable value as a function of the engine speed signal, and modify the transmission control signal to correspond to a lower gear ratio in all but the lowest gear ratio when the downshift signal is received and a value responsive to the vehicle speed signal is less than the down shift enable value signal. An actuator is adapted to receive the transmission control signal and responsively control the transmission gear ratio.

    摘要翻译: 提供一种用于具有包括多个传动比的发动机驱动变速器的车辆中的装置。 该装置包括适于感测指示车辆速度并且响应地产生车辆速度信号的参数的传感器。 提供降档开关以可控地产生降档信号。 发动机速度传感器感测发动机转速并响应地产生发动机转速信号。 控制器适于接收车速,发动机转速和降档信号,处理车速信号以产生变速器控制信号,产生作为发动机转速信号的函数的下移允许值,并修改变速器控制信号 以对应于当接收降档信号时除了最低传动比之外的所有低齿轮比,并且响应于车速信号的值小于下移允许值信号。 致动器适于接收变速器控制信号并且响应地控制变速传动比。

    End-of-fill detector for a fluid actuated clutch
    5.
    发明授权
    End-of-fill detector for a fluid actuated clutch 失效
    用于流体致动离合器的终止填充检测器

    公开(公告)号:US6115661A

    公开(公告)日:2000-09-05

    申请号:US57567

    申请日:1998-04-09

    摘要: In one aspect of this invention, a fluid actuated clutch is disclosed. The fluid actuated clutch is operatively connected to a control valve that is actuated by an electronic controller that receives a signal from an input mechanism, including a value for speed of an engine drive and a value of output speed for a torque converter. The method includes detecting a torque converter ratio which is the output speed of the torque converter divided by the engine drive speed, and detecting if there is at least one torque converter decrease exceeding a predetermined level and preferably detecting if there are at least two consecutive decreases in the torque converter ratio with at least one of the torque converter decreases exceeding a predetermined minimum level. This condition represents the end-of-fill point for the fluid actuated clutch.

    摘要翻译: 在本发明的一个方面,公开了一种流体致动离合器。 流体致动离合器可操作地连接到由接收来自输入机构的信号的电子控制器致动的控制阀,所述电子控制器包括用于发动机驱动的速度的值和用于变矩器的输出速度的值。 该方法包括检测作为转矩转换器的输出速度除以发动机驱动速度的变矩器比率,以及检测是否存在至少一个超过预定水平的变矩器降低,并且优选地检测是否存在至少两个连续减小 在变矩器比率中,至少一个变矩器转矩降低超过预定最小水平。 该条件表示流体致动离合器的最终填充点。

    Method of controlling clutch-to-clutch shifts for a powershift
transmission
    9.
    发明授权
    Method of controlling clutch-to-clutch shifts for a powershift transmission 失效
    控制离合器与离合器换档的动力换挡变速器的方法

    公开(公告)号:US5467854A

    公开(公告)日:1995-11-21

    申请号:US257391

    申请日:1994-06-07

    摘要: In one aspect of the present invention, an electronic shift control for a powershift transmission is disclosed. The transmission includes a plurality of speed and direction changing clutches. A plurality of pressure control valves are individually connected to the clutches. A hydraulic pump delivers pressurized hydraulic oil to predetermined pressure control valves to meter hydraulic fluid in response to receiving a clutch command signal. The method produces a shift from a first transmission ratio to a second transmission ratio through disengagement of an off-going clutch associated with the first transmission ratio and engagement of an on-coming clutch associated the second transmission ratio. The method includes filing an on-coming speed clutch, releasing an off-going direction clutch in response to the on-coming speed clutch being filled, and thereafter, gradually increasing the on-coming speed clutch pressure to engage the speed clutch. Finally, the on-coming direction clutch pressure is gradually increased to engage the direction clutch in response to the on-coming speed clutch being engaged.

    摘要翻译: 在本发明的一个方面,公开了一种用于动力换挡变速器的电子换挡控制装置。 变速器包括多个速度和方向变换离合器。 多个压力控制阀分别连接到离合器。 液压泵将加压的液压油输送到预定的压力控制阀,以响应于接收到离合器命令信号来计量液压流体。 该方法通过脱离与第一变速比相关联的离合离合器和与第二变速比相关的先前离合器的接合而产生从第一变速比到第二变速比的换档。 该方法包括装载一个即将来临的速度离合器,响应于前进速度离合器被填充而释放一个离开的方向离合器,然后逐渐增加进来速度离合器压力以接合速度离合器。 最后,响应于前进速度离合器接合,逐渐增大的进入方向离合器压力以接合方向离合器。