Shock absorber having check disc for orifice passage

A shock absorber for a vehicle includes a pressure tube that defines a fluid chamber and a piston disposed within the fluid chamber. The piston divides the fluid chamber into an upper working chamber and a lower working chamber, and defines a compression passage and a rebound passage. A valve disc assembly of the shock absorber engages the piston and controls the flow of fluid between the upper and lower working chambers. The valve disc assembly includes a check disc and an orifice disc. The check disc is disposed between the piston and the orifice disc. The orifice disc defines an orifice, and the check disc prohibits the flow of fluid through the orifice as the fluid flows in a first direction and permits the flow of fluid through the orifice as the fluid flows in a second direction opposite of the first direction. 种用于车辆的减振器，包括限定流体室的压力管和布置在该流体室内的活塞。该活塞将该流体室分成上工作室和下工作室，并且限定压缩通路和回弹通路。该减振器的阀盘组件接合该活塞并控制流体在该上工作室和该下工作室之间流动。该阀盘组件包括止回盘和孔口盘。该止回盘布置在该活塞和该孔口盘之间。该孔口盘限定孔口，并且该止回盘当流体在第方向上流动时阻止流体穿过该孔口流动，并且当流体在与该第方向相反的第二方向上流