top dead center

Two TDC ( Top Dead Center ) sensors are mounted at the rear of the single camshaft.

两个上死点的传感器安装在凸轮轴的后面.

Turn the piston to the top dead center.

将活塞转到上止点.

The results of calculating and experimenting show that the first and largest slap of impact between the piston and the liner occurs around the top dead center from the nonthrust to the thrust face.

经计算和实验表明：活塞在上止点附近，当活塞由非推力面快速地移向推力面时，对缸套具有较大的冲击能量。

According to the simulation calculation results of piston slapping, we can see that the radical acceleration and tilting angular acceleration of the piston near the top dead center in the combustion stroke are most, so the piston slapping is the most serious.

根据活塞敲击运动仿真计算结果发现活塞在燃烧上止点附近的径向加速度以及绕销轴的摆动加速度最大，从而导致活塞对缸套的敲击也最大。

It is necessary to use three position signals when reflect the position of Four Stroke Gasoline Engine's piston in cylinder: Top Dead Center Signal, Compression Stroke Signal, Crankshaft Position Signal.

反映四冲程汽油机的活塞在气缸中的位置时，要用到三个位置信号：上止点信号、压缩行程信号、曲轴转角信号。