本分配式燃料喷射泵的特点是装有往复旋转的柱塞,在下死点附近,压力油通路和低压油路相通,怠速时由于阀门开启,柱塞停止泵油,这时喷射率下降,燃烧噪音降低。 柱塞7的压油通路12通过油路23与环形槽24相通,柱塞套简6、分配盖6a在柱塞下死点位置与环形 The distributed fuel injection pump is characterized by reciprocating rotation of the plunger, near the bottom dead center, the pressure oil passage and the low-pressure oil Road, at idle when the valve is open, the plunger stops pumping oil, when the injection rate drops, the combustion Noise reduction. Plunger 7 of the pressure oil passage 12 through the oil passage 23 and the annular groove 24 communicates with the plunger sleeve simple 6, the distribution cap 6a at the bottom dead center position and the annular piston