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    • 4. 发明公开
    • A method for adaption of supercharger clutch torque in an internal combustion engine
    • Verfahren zur Anpassung eines Laderkupplungsmoments bei einem Verbrennungsmotor
    • EP3006246A1
    • 2016-04-13
    • EP14188403.1
    • 2014-10-10
    • Volvo Car Corporation
    • Nordin, HenrikSvensson, Johan
    • B60K6/387F16D27/00
    • B60K6/387F16D48/064F16D2500/1021F16D2500/10412F16D2500/1045F16D2500/30415F16D2500/30421F16D2500/50236F16D2500/70408F16D2500/7044F16D2500/70605
    • The invention relates to a method for adaption of clutch torque in an electromagnetic clutch (1) for an auxiliary rotating unit (2) such as a supercharger or an AC compressor by means of an engine control unit (3), wherein engagement of said electromagnetic clutch (1) is achieved by means of a coil control current being applied to an electromagnetic coil (4) which pulls a clutch armature disc (5) connected to the auxiliary rotating unit (2) into engagement with a clutch rotor (6) operatively connected to an internal combustion engine (7) which is provided with a crank speed sensor (8) for feeding a crank speed signal to the engine control unit (3). The method comprises the following steps:
      - step 1: intermittently performing an adaption engagement of the clutch (1) initiated by the engine control unit (3)
      - step 2: recording crank speed signal disturbance data from a disturbance in said crank speed signal following clutch speed synchronization,
      - step 3: entering said crank speed signal disturbance data into a look-up table or an equation yielding an adaption factor,
      - step 4: multiplying said adaption factor with a previously stored torque adaption factor (TAF) yielding a new torque adaption factor (TAF);
      - step 5: applying said new torque adaption factor (TAF) to a nominal clutch torque table yielding an adapted coil control current/actual clutch torque relationship
      - step 6: iterating steps 1 through 5 until the remaining relative error between deduced actual clutch torque and expected nominal clutch torque is reduced to an accepted predetermined level.
    • 本发明涉及一种用于通过发动机控制单元(3)适应用于诸如增压器或AC压缩机的辅助旋转单元(2)的电磁离合器(1)中的离合器扭矩的方法,其中所述电磁 离合器(1)通过施加到电磁线圈(4)的线圈控制电流来实现,该电磁线圈(4)将连接到辅助旋转单元(2)的离合器电枢盘(5)与离合器转子(6)可操作地接合 连接到内燃机(7),内燃机(7)设置有用于向发动机控制单元(3)供给曲轴转速信号的曲柄转速传感器(8)。 该方法包括以下步骤: - 步骤1:间歇地执行由发动机控制单元(3)启动的离合器(1)的适应接合 - 步骤2:记录来自所述曲柄速度信号中的干扰的曲柄速度信号干扰数据 离合器速度同步,步骤3:将所述曲柄速度信号干扰数据输入到查找表或产生适应因子的方程中,步骤4:将所述自适应因子与先前存储的转矩适应因子(TAF)相乘,产生新的 扭矩适应因子(TAF); - 步骤5:将所述新的转矩适应因子(TAF)应用于公称离合器扭矩表,产生适应的线圈控制电流/实际离合器扭矩关系 - 步骤6:迭代步骤1至5,直到推导的实际离合器扭矩和 期望的公称离合器扭矩减小到接受的预定水平。