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1. 发明公开

EP1118493A2 Method and apparatus for providing range shift synchronization in a transfer case 有权
标题翻译： Methode und Einrichtung zur Synchronization beim Schalten eines Verteilergetriebes
公开(公告)号：EP1118493A2
公开(公告)日：2001-07-25
申请号：EP01300329.8
申请日：2001-01-16
申请人： Borg Warner Inc.
发明人： Oliveira, Gary A. , Fosmoe, Richard T. , Ficht, John R.
IPC分类号： B60K17/344
CPC分类号： B60W10/06 , B60K17/3467 , B60W10/02 , B60W10/10 , B60W10/115 , B60W10/14 , B60W30/18 , B60W30/1819 , B60W2510/0216 , B60W2510/1015 , B60W2510/104 , F16H59/46 , F16H61/0403 , F16H61/2807 , F16H61/32 , F16H61/702 , F16H63/304 , F16H63/46 , F16H2059/462 , F16H2061/2823 , F16H2063/3056 , F16H2063/3066 , Y10T74/19284 , Y10T477/69335
摘要： A transfer case includes an input shaft (50), an output shaft (40), and a gear set (48) selectively operable to translate torque between the input and output shafts at reduced speeds. A clutch (84) is operable to translate torque between the input and output shafts either directly or through the gear set. An actuator (100), having a rotational output, is operatively coupled to the clutch for moving the clutch between predetermined positions. A control unit is employed in connection with the transfer case to effect the method of synchronizing low to high shifts in the transfer case. To this end, the control unit calculates the speed of the actuator as it moves the clutch to a neutral position. The control unit further determines the additional time until the clutch will reach a predetermined synchronization point using the speed of the actuator and the remaining rotational distance through which the actuator must move for the clutch to reach the predetermined synchronization point. The control unit is further operable to stop the actuator when the clutch has reached the synchronization point for no longer than a predetermined time. The control unit then senses and compares the rotational speeds of the input and output shafts and signals the actuator to complete the shift from low to high by moving the clutch to provide direct torque translation between the input and output shafts when the difference in the rotational speeds of the input and output shafts is less than a predetermined value.
摘要翻译：传送箱包括输入轴（50），输出轴（40）和齿轮组（48），齿轮组选择性地可操作以以降低的速度在输入轴和输出轴之间转动扭矩。离合器（84）可操作以直接或通过齿轮组在输入轴和输出轴之间转动扭矩。具有旋转输出的致动器（100）可操作地联接到离合器，用于使离合器在预定位置之间移动。与转移箱一起使用控制单元以实现在转移箱中同步低到高位移的方法。为此，控制单元在将离合器移动到中立位置时计算出致动器的速度。控制单元还使用致动器的速度和致动器必须移动的剩余旋转距离来确定离合器将达到预定同步点之前的附加时间，以使离合器达到预定的同步点。当离合器已经达到同步点不超过预定时间时，控制单元进一步可操作以停止致动器。控制单元然后感测并比较输入和输出轴的转速，并且通过移动离合器来完成从低到高的移动，从而当转速差时，在输入和输出轴之间提供直接的转矩平移的输入和输出轴小于预定值。

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