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    • 6. 发明授权
    • Engine torque control during multiple speed changes of an automatic transmission
    • 自动变速器多速变速时的发动机转矩控制
    • US06254508B1
    • 2001-07-03
    • US09425190
    • 1999-10-25
    • Kouichi KojimaHiroshi TsutsuiMasao SaitouMasaaki NishidaYoshihisa Yamamoto
    • Kouichi KojimaHiroshi TsutsuiMasao SaitouMasaaki NishidaYoshihisa Yamamoto
    • B60K4104
    • B60W10/06B60W10/04B60W10/11B60W10/115B60W30/18B60W30/1819F16H61/061F16H63/502F16H2059/425F16H2059/6807F16H2306/24Y10T477/677
    • In a multiple speed-change operation for switching between an up-shift operation and a down-shift operation, engine torque control is adapted to an actual change in speed-change state, whereby an abrupt change in rotational speed of the input shaft is prevented. One embodiment relates to a speed-change operation from the second speed to the third speed, wherein the engagement-side hydraulic pressure B4 rises and the release-side hydraulic pressure B5 drops, the rotational speed NT of the input shaft changes from a second speed state toward a third speed state and the engine torque TE is reduced by a predetermined amount TCU. If a command to perform a speed-change operation from the third speed to the second speed is issued during the aforementioned speed-change operation from the second speed to the third speed, control of the hydraulic pressures is switched to the speed-change operation from the third speed to the second speed. If it is detected because of the hydraulic pressure control that the direction of the change &ohgr; in rotational speed of the input shaft has changed toward the second speed, it is determined that the speed-change operation has actually started. Then, the torque reduction operation is suspended, and the torque is gradually restored.
    • 在上变速操作和换档操作之间切换的多次变速操作中,发动机扭矩控制适应于变速状态的实际变化,从而防止输入轴的转速急剧变化 。 一个实施例涉及从第二速度到第三速度的变速操作,其中接合侧液压B4上升,释放侧液压B5下降,输入轴的转速NT从第二速度 状态朝向第三速度状态,并且发动机转矩TE减小预定量TCU。 如果在从第二速度到第三速度的上述变速操作期间发出执行从第三速度到第二速度的变速操作的命令,则将液压控制切换到速度变化操作 第三速到第二速。 如果由于液压控制检测到输入轴的转速的变化方向Ω的方向朝向第二速度变化,则确定变速操作已经实际开始。 然后,停止转矩降低操作,并且扭矩逐渐恢复。