495型柴油机供油时间的调整,是利用油泵二角接盘上的3个长圆弧孔,使泵体相对于油泵凸轮轴正反方向转动所需的角度来实现的。但由于长圆弧形孔的弧长相对于油泵凸轮中心线的圆心角为20°(即最大可以改变供油提前角40°),而该机型的供油提前角仅为16°±2°。这样,在调整供油时间时,如果不能把握住调整后供油提前角的准确数值,往往不是把提前角调得太大,就是太小,使柴油机的工况达 495 diesel engine oil supply time adjustment, is the use of the oil pump angle plate connected to the two long arc holes, so that pump with respect to the positive and negative direction of rotation of the pump camshaft angle required to achieve. However, due to the long arc-shaped hole arc center angle relative to the pump cam center angle of 20 ° (that can change the maximum fuel supply advance angle of 40 °), while the models of fuel supply advance angle of only 16 ° ± 2 °. In this way, when adjusting the fuel supply time, if you can not grasp the exact value of the adjusted fuel advance angle, often not to adjust the advance angle too much, or too small, so that the working conditions of diesel