在涡流室发动机中,由于流动损失和散热损失较大,因此起动较为困难,为克服这一问题,在 S1100柴油机上采用沿喷油方向上钻一漏斗形的小孔(即钻一中心相对气缸盖中心线往进气座孔方向偏移3°±1°的小孔),来保证柴油机的冷起动性能,所以小孔位置的偏移将直接影响柴油机的起动性能。在以前的装配工艺中,操作工根据视力来判别孔的相对位置,用手工来装配,往往会产生较大的误差,难以保证产品的质量, In the vortex chamber engine, due to the loss of flow and heat loss greater, so starting more difficult, in order to overcome this problem, the S1100 diesel engine using a funnel-shaped hole along the injection direction (ie, drilling a center relative to the cylinder Cover the center line to the direction of the air inlet hole offset 3 ° ± 1 ° holes), to ensure that the diesel engine cold start performance, so the small hole position offset will directly affect the starting performance of the diesel engine. In the previous assembly process, the operator to determine the relative position of the hole according to visual acuity, manual assembly, often have a greater error, it is difficult to ensure product quality,