Fuel injection pump device and method for settling the same

A fuel injection pump device which comprises:

• a delivery valve communicated with a pressurizing chamber formed in a housing, loaded by a spring and communicated with a fuel injection nozzle;
• a plunger with its one end facing the pressurizing chamber and the other end operatively connected with a cam which is driven by an engine;
• a fuel chamber provided so as to surround the plunger in the housing;
• an oil passage formed in the plunger so that its one end communicates to the pressurizing chamber and the other end communicates to the fuel chamber;
• a control sleeve slidably mounted on the outer periphery of the plunger in the fuel chamber;
• a control groove provided on the outer peripheral surface of the plunger for communicating the pressurizing chamber and fuel chamber to each other by way of the oil passages or for interrupting the same, said control groove having at least longitudinally directed edges and inclined edges provided with relation to the axis of the plunger;
• control ports provided on the control sleeve and communicating the control groove to the fuel chamber when a fuel injection is completed;
• an injection quantity control member supported on the housing for controlling a fuel injection quantity;
• an injection timing control member for moving the control sleeve in the axial direction of the plunger;
• fuel injection control means for controlling the injection quantity control member and the injection timing control member in accordance with signals from operating state information sources, the fuel injection control means is composed so as to advance the injection timing control member on the basis of the information of the engine in a high speed region from the operating state information sources;
• the control groove is provided on the plunger and the control ports on the control sleeve, respectively, and the length between the upper end of the control sleeve and the control ports is set so as to be equal to or shorter than the length between the upper end of the longitudinally directed edges and the control ports when the plunger is under the state of the minimum effective stroke by virtue of the operation of the injection quantity control member and at the position where it has risen to the top, whereby two-stage blasting of fuel is prevented.