用活塞位移确定上止点相位的方法

On the Method of Defining TDC with a Piston Displacement

用位移传感器实测发动机活塞在上止点附近的位移,确定上止点相位。如果直接根据活塞位移实测结果确定上止点相位,存在较大的偏差,而根据实测结果用二次拟合的方法确定则可以提高上止点相位的确定精度,并给出了相应的步骤。

In this paper,the method of defining TDC with a piston displacement is designed.It may produce a bigger error if defining TDC with a piston displacement directly.However,the error of defining TDC can be reduced by quadratic fitting of a piston displacement ,and the relevant steps are given.