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    • 40. 发明申请
    • METHOD AND CONTROLLER FOR A POWERTRAIN IN A MACHINE
    • 机器动力系统的方法与控制器
    • WO2015105634A1
    • 2015-07-16
    • PCT/US2014/070291
    • 2014-12-15
    • CATERPILLAR INC.
    • KNOX, Kevin J.
    • F16H45/02B60K6/38
    • F16H61/14F16H2061/145Y10T477/6352
    • The method and controller regulate a machine (100) having a powertrain (120) including an engine (110) connected to a transmission (130) having a plurality of gear ratios (132) for changing the speed ratio. Disposed between the engine (110) and the transmission (130) is a torque convertor (160) associated with a lockup clutch (170). A shift signal can be received that indicates a gear shift between gear ratios (132). In response, the fluid pressure in the lockup clutch (170) can be reduced to an unlocked pressure (244) at which the lockup clutch (170) is unlocked but does not slip. The speed ratio (202) in the transmission (130) is thereafter monitored for an inertia phase (214) and a torque phase (212). In the inertia phase (214), the speed ratio (202) of the transmission (170) begins to change and in the torque phase (212), the speed ratio (202) remains constant. During the inertia phase (214), the fluid pressure in the lockup clutch (170) is reduced to a hold pressure (246) in which the lockup clutch slips.
    • 该方法和控制器调节具有动力系(120)的机器(100),该动力总成包括连接到具有用于改变速比的多个变速比(132)的变速器(130)的发动机(110)。 配置在发动机(110)和变速器(130)之间的是与锁止离合器(170)相关联的转矩转换器(160)。 可以接收指示齿轮比(132)之间的换档的换档信号。 作为响应,锁止离合器(170)中的流体压力可以减小到锁定离合器(170)解锁但不滑动的解锁压力(244)。 此后,在惯性阶段(214)和扭矩阶段(212)中监测变速器(130)中的速比(202)。 在惯性阶段(214)中,变速器(170)的变速比(202)开始变化,在扭矩阶段(212)中,变速比(202)保持恒定。 在惯性阶段(214)期间,锁止离合器(170)中的流体压力减小到锁定离合器滑动的保持压力(246)。