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    • 3. 发明授权
    • Method for determining a friction value
    • 确定摩擦值的方法
    • US06694798B2
    • 2004-02-24
    • US10182273
    • 2002-07-25
    • Karl KühnerManfred SiegerJörg GeisAndreas Schwarz
    • Karl KühnerManfred SiegerJörg GeisAndreas Schwarz
    • G01N1902
    • G01M13/022F16H61/686F16H2061/064F16H2342/04F16H2342/044
    • The invention is based on a process for determination of a coefficient of friction (&mgr;) of a hydraulically activated coupling (4, 5, 6) or brake (7, 8, 9) in a load-shifting transmission (1). It is proposed that a drive shaft (14) of the transmission (1) be driven with a specified torque (T), that an output shaft (15) of the transmission (1) is blocked with a closed coupling (4, 5, 6) or brake (7, 8, 9) during a calibration run, the activation pressure (p) of coupling (4, 5, 6) or brake (7, 8, 9) is reduced in accordance with a specified course over time, the differential rotational speed (&Dgr;n) between the input (17, 18, 19) and the output (20) of the coupling (4, 5, 6) or brake (7, 8, 9) is recorded, the activation pressure (p) is ascertained in which the differential rotation speed (&Dgr;n) is greater than zero and a separation coefficient of friction (&mgr;separation) is computed on the basis of torque (T), activation pressure (p) and a construction-conditioned coupling constant. By ascertaining the coefficient of friction &mgr;, the shifting can be conducted over the lifetime of the transmission (1) with a constant shift quality.
    • 本发明基于用于确定载荷移动传动装置(1)中的液压致动联接器(4,5,6)或制动器(7,8,9)的摩擦系数(μ)的方法。 建议以特定扭矩(T)驱动变速器(1)的驱动轴(14),变速器(1)的输出轴(15)以闭合联接(4,5), 6)或制动器(7,8,9),在联动(4,5,6)或制动器(7,8,9)的启动压力(p)根据指定的过程随时间而减小 记录输入(17,18,19)和联轴器(4,5,6)或制动器(7,8,9)的输出(20)之间的差速旋转速度(Deltan),启动压力 p)确定差速旋转速度(Deltan)大于零,并且基于扭矩(T),启动压力(p)和施工条件耦合常数计算摩擦分离​​系数(分离)。 通过确定摩擦系数μ,可以以恒定的换档质量在变速器(1)的寿命期内进行换档。