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    • 1. 发明授权
    • Clutch return spring pressure learning during a coasting maneuver
    • 离合器返回弹簧压力学习在滑行机动
    • US08831844B2
    • 2014-09-09
    • US13560048
    • 2012-07-27
    • Todd J. Thor
    • Todd J. Thor
    • B60W10/02
    • F16D48/06F16D2500/10412F16D2500/1045F16D2500/10487F16D2500/30F16D2500/3024F16D2500/3067F16D2500/50F16D2500/5018F16D2500/5085F16D2500/70406F16D2500/70488F16H61/06F16H2059/186F16H2061/064F16H2342/04Y02T10/76
    • A method of learning the return spring pressure of a clutch in a vehicle having an engine and an automatic transmission includes selecting a clutch for analysis from a plurality of clutches of the transmission when the vehicle coasts for a predetermined duration. The method includes ramping down clutch pressure to the selected clutch until engine speed reaches idle and measuring the clutch pressure for the selected clutch after engine speed has remained at idle for a calibrated duration. An actual return spring pressure may be calculated as a function of the preliminary return spring pressure. The actual return spring pressure may be used thereafter to control a subsequent shift event of the transmission. A vehicle includes an engine, transmission, and controller configured to detect a predetermined coasting condition, and to execute code using a processor to thereby execute the above method. A system includes the transmission and controller.
    • 一种学习具有发动机和自动变速器的车辆中的离合器的复位弹簧压力的方法包括当车辆滑行预定持续时间时,从多个离合器中选择用于分析的离合器。 该方法包括将离合器压力降低到所选择的离合器,直到发动机转速达到怠速并且在发动机转速保持怠速校准时间之后测量所选离合器的离合器压力。 可以根据预备复位弹簧压力来计算实际的复位弹簧压力。 此后可以使用实际的返回弹簧压力来控制变速器的随后的换档事件。 车辆包括被配置为检测预定的滑行状态的发动机,变速器和控制器,以及使用处理器执行代码从而执行上述方法。 系统包括变速箱和控制器。