Injector

An injector, comprising:

• an injection nozzle having a nozzle hole;
• a valve body for controlling a fuel flow through the nozzle hole;
• and
• changing means for changing a shape of a fuel spray, the fuel spray being formed by the fuel which flows through the nozzle hole, wherein the center axis of the valve body is allowed to be eccentrically located with respect to a center axis of the injection nozzle, and wherein the injector further comprises eccentricity controlling means for controlling an eccentricity of the center axis of the valve body with respect to the center axis of the injection nozzle.

An injector, comprising:

• an injection nozzle having a nozzle hole;
• a valve body for controlling a fuel flow through the nozzle hole;
• and
• changing means for changing a shape of a fuel spray, the fuel spray being formed by the fuel which flows through the nozzle hole, wherein the valve body includes an inner member with a tip and an outer member located outside of the inner member, and wherein a relative position of the tip with respect to the outer member during the valve opening period is decided on the basis of a target fuel spray to be injected, and then the tip is positioned to the decided position.

An injector, comprising:

• an injection nozzle having a nozzle hole;
• a valve body for controlling a fuel flow through the nozzle hole;
• and
• changing means for changing a shape of a fuel spray, the fuel spray being formed by the fuel which flows through the nozzle hole, wherein the valve body includes an inner member with a tip and an outer member located outside of the inner member, and wherein the changing means includes selecting means for selecting a protruding amount of the tip with respect to the outer member during the valve opening period.

An injector, comprising:

• an injection nozzle having a nozzle hole;
• a valve body for controlling a fuel flow through the nozzle hole;
• and
• changing means for changing a shape of a fuel spray, the fuel spray being formed by the fuel which flows through the nozzle hole, wherein the changing means changes the shape of fuel spray by changing a shape of the nozzle hole on the basis of a lift amount of the valve body.

An injector, comprising:

• an injection nozzle having a nozzle hole;
• a valve body for controlling a fuel flow through the nozzle hole;
• and
• changing means for changing a shape of a fuel spray, the fuel spray being formed by the fuel which flows through the nozzle hole, wherein the nozzle hole is a slit, and the valve body is hollow, and the valve body has a first opening placed downstream with respect to a fuel seal portion in order that the fuel to be injected can flow into the valve body, and a second opening placed downstream with respect to the first opening in order that the fuel which flows into the valve body can flow out of the valve body, and wherein an upstream width of the second opening is smaller than an downstream width of the second opening and smaller than a width of the slit, and as a lift amount of the valve body increases, an overlapping area of the slit and the second opening increases, and after a valve opening motion is completed, a minimum cross section of a fuel passage is defined by the first opening and is kept constant.

An injector, comprising:

• an injection nozzle having a nozzle hole;
• a valve body for controlling a fuel flow through the nozzle hole;
• and
• changing means for changing a shape of a fuel spray, the fuel spray being formed by the fuel which flows through the nozzle hole, wherein a fuel passage is defined by an inner periphery of the injection nozzle and an outer periphery of the valve body, and a fuel flow controlling member is located in the fuel passage, and wherein the fuel flow controlling member is moved along a center axis of the injector in order that the fuel flow can be changed in the fuel passage.

An injector, comprising

• an injection nozzle having a nozzle hole;
• a valve body for controlling a fuel flow through the nozzle hole;
• and
• changing means for changing a shape of a fuel spray, the fuel spray being formed by the fuel which flows through the nozzle hole, wherein a fuel passage is defined by an inner periphery of the injection nozzle and an outer periphery of the valve body, and a cylindrical member is located on a tip side of the valve body in the fuel passage, and wherein the cylindrical member is movable independently of the valve body, and at least one communicating portion for communicating with an outer periphery and an inner periphery of the cylindrical member is located at a tip portion of the cylindrical member, and the cylindrical member is moved in the same direction as a moving direction of the valve body in order to change the fuel flow in the fuel passage.