对于包括用于共同旋转围绕旋转（A）的轴线具有驱动构件的车辆的离合器组件为耦合和填充有工作摩擦元件的流体或可加载壳体（12）和一个具有可旋转地联接的第一摩擦元件载体（30）的第一组（34） 中，第一摩擦元件载体（30）具有摩擦元件中的一个与所述第一摩擦元件载体的内齿（36）的第一组（34）的内齿（36）和所述摩擦元件（32）（30）啮合的外齿（38）， 其中，在所述第一摩擦元件载体之间的啮合齿部（36,38），一个第一流体通道（76）（30）和所述第一组的所述摩擦元件（32）的区域（34）的摩擦元件的形成，并且其中所述区域的比率V 1 所述第一流体通道（76）的第一最大通道面积限定在0.3≤V1≤0.7的范围内， 最大通道面积限定了由第一摩擦元件支架（30）的内​​齿（36）的根圆与第一组（34）的摩擦元件（32）的外齿（38）的根圆之间的摩擦元件形成的环形表面。

A coupling assembly for a vehicle comprising a for common rotation about a rotational axis (A) with a drive element to be coupled and filled with working fluid or fillable housing (12) and one with a first friction element (30) rotatably coupled first group (34) of friction elements wherein the first friction element carrier (30) has an internal toothing (36) and the friction elements (32) of the first group (34) of friction elements one with the internal toothing (36) of the first friction element carrier (30) meshing external teeth (38), wherein in the region of the mutually engaging toothings (36,38), a first fluid passage (76) is formed between the first friction element carrier (30) and the friction elements (32) of the first group (34) of friction elements, and wherein a ratio V ₁ of the surface of the first fluid passage (76) is located to a first maximum passage area in the range from 0.3 ≤ V ₁ ≤ 0.7, the first maximum passage area determined as a between a root circle of the internal toothing (36) of the first friction element carrier (30) and a root circle of the external toothing (38) of the friction elements (32) of the first group (34) of friction elements ring surface formed.