One option is to use sequentially triggered vertebrae made of electroactive polymers, whose shape is modified by applying a voltage. 现在一种选择是继续使用由电聚合物制造的触发椎骨，其形状是通过触发电压而改变的。
The trigger wheel rotates with engine RPMs and causes the speed sensor, or pickup oil, to produce triggering voltage pulses that correspond to engine speed and piston position. 触发叶轮随发动机转速而旋转，使得转速传感器或拾波线圈产生与发动机转速和活塞位置相对应的触发电压脉冲。
