Dual-purpose quantitative feeder spring

The invention relates to a dual-purpose quantitative feeder spring. An injection assembly for a vehicle exhaust system includes a housing defining a fluid chamber, a doser mounted to the housing and configured to inject fluid into the fluid chamber, and a valve to control fluid flow. The valve is movable between an open position and a closed position. The resilient member is configured with a biasing force to bias the valve to the closed position. When the fluid is heated downstream of the valve and exceeds a predetermined pressure level, the biasing force is overcome to cause the fluid to flow back into the fluid chamber. 本发明题为"两用定量加料器弹簧"。一种用于车辆排气系统的喷射组件，该喷射组件包括限定流体腔的壳体、安装到该壳体并被构造成将流体喷射到流体腔中的定量加料器、以及控制流体流动的阀。该阀能够在打开位置和关闭位置之间移动。弹性构件配置有偏置力以将阀偏置到关闭位置。当流体在阀的下游被加热并超过预定压力水平时，该偏置力被克服从而使流体回流到流体腔中。