OUTLINE Control lever Full-load adjusting screw Governor lever Magnet valve Drive shaft Distributor head Feed pump Plunger Roller holder Cam disk Timer Plunger spring Delivery valve / | Fig. 1 VE type injection pump construction With the PE type (in-line type) injection pump, In comparison with the the injection pump has less than half the number of parts, and was order to satisfy the need for a small, number of pump elements (plunger assemblies) must be the same as the number of engine cylinders. However, with the VE type (distributor type) injection pump, the number of plungers has no relationship to the number of engine cylinders, and there is only one plunger.
This single plunger reciprocates while rotating, and fuel oil is injected into each cylinder through the injection pipes in accordance with the engine's firing order. As well as this, the governor, timer, feed pump etc. installed on the outside of the PE type injection pump are equipped within the VE type injection pump. component PE type, the VE type developed in light- weight and high-speed injection pump. In response to operator requirements, it was possible to design a pump with accelerator “feeling” close to that of gasoline vehicles.
A VE type injection pump for direct injection system engines has recently been developed, and is expected to be adopted in a wide range of fields, including construction machinery, medium-sized trucks etc.