Fuel injection pump for internal combustion engines
AssigneeRobert Bosch GmbH
InventorsKlaus Dobler, Hansjorg Hachtel
Life of this patent
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Abstract
Fuel injection pump for internal combustion engines comprising a displacement pickup for determining the position of control elements arranged in a pump housing. The displacement pickup comprises a movable part, which is arranged in the pump housing and is connected with the control element, and a stationary part which is arranged on the outside of the pump housing. The position of the movable part of the displacement pickup is determined by the stationary part by means of a measuring process which measures in a contactless manner, e.g. by means of the induction or eddy current principle.
Claims12
A fuel injection pump for internal combustion engines, comprising a pump housing which encloses a pump interior space;
- at least one control element arranged in said pump housing;
- a displacement pickup, said displacement pickup having a stationary electrical part arranged outside of said pump housing and a movable mechanical part arranged in said pump interior space as a part which is moved by said control element, said displacement pickup operating in accordance with the principle of a measuring process which measures in a contactless manner;
- a pump plunger;
- a shaft;
- and a quantity adjusting member arranged in said pump interior space for controlling a fuel injection quantity delivered under high pressure by said pump plunger, said quantity adjusting member being adjustable via said shaft which acts at said quantity adjusting member, said movable part of said displacement pickup being connected with said shaft on a side of said shaft facing said pump housing, said shaft having a longitudinal axis, said pump housing having a wall at which said stationary part of said displacement pickup is externally arranged, said movable part of said displacement pickup being connected with said shaft so as to be fixed with respect to rotation relative to it and being arranged at a slight distance from said pump housing, said movable part of said displacement pickup being constructed as a structural component part which projects on one side eccentrically relative to said longitudinal axis of said shaft and extends parallel relative to said wall of said housing at which the stationary part is externally arranged.
A fuel injection pump for internal combustion engines, comprising a pump housing which encloses a pump interior space;
- at least one control element arranged in said pump housing;
- a displacement pickup, said displacement pickup having a stationary electrical part arranged outside of said pump housing and a movable mechanical part arranged in said pump interior space as a part which is moved by said control element, said displacement pickup operating in accordance with the principle of a measuring process which measures in a contactless manner;
- a pump plunger;
- a shaft;
- and a quantity adjusting member arranged in said pump interior space for controlling a fuel injection quantity delivered under high pressure by said pump plunger, said quantity adjusting member being adjustable via said shaft which acts at said quantity adjusting member, said movable part of said displacement pickup being connected with said shaft on a side of said shaft facing said pump housing, said movable part being formed as a hollow cylinder which is connected with said shaft so as to be fixed with respect to rotation relative to it and has window-like cutout portions arranged so as to be offset relative to one another at a circumference and also along a longitudinal axis of said hollow cylinder.
A fuel injection pump for internal combustion engines, comprising a pump housing which encloses a pump interior space which is filled with fuel;
- at least one control element arranged in said pump housing;
- a displacement pickup, said displacement pickup having a stationary electrical part arranged outside of said pump housing and a movable mechanical part arranged in said pump interior space as a part which is moved by said control element, said displacement pickup operating in accordance with the principle of a measuring process which measures in a contactless manner.
Dependencies are inferred from the claim text.