一、前言分配式喷油泵(以下简称分配油泵),由一个分配转子内的对置柱塞挤压产生高压油,以旋转分配的方式经分配套筒定时定量地供给各个气缸。分配油泵主要应用于中小型柴油机,早期多见于拖拉机和工程机械,现在已使用到中、轻型载重汽车上。分配油泵的优点是结构紧凑,精密偶件数目少,体积小,重量轻。其零件总数不随发动机缸数的增加而显著增加,产品通用系列化程度较高;在结构上具有独特的怠速加浓装置,低述运转平稳;燃料经济性好;各缸供油量和相位均匀性由零件制造公差保证,不存在校准 I. Introduction Distributed injection pump (hereinafter referred to as the distribution pump), by a distribution within the rotor opposed to produce high-pressure oil squeeze the plunger, the rotation distribution of the distribution of the sleeve by the timing quantitatively supplied to each cylinder. Distribution pump is mainly used in small and medium-sized diesel engines, early more common in tractors and construction machinery, has now been used to medium and light trucks. The advantages of distributing the oil pump are the compact structure, the small number of precision couplings, the small size and the light weight. The total number of parts does not increase significantly with the increase in the number of engine cylinder, the product of a higher degree of serialization; in the structure of a unique idle plus enrichment device, the smooth operation of the low; fuel economy is good; each cylinder fuel supply and phase uniformity Guaranteed by part manufacturing tolerances, there is no calibration