JPS5945813B2 - Control stick for diesel engine fuel injection system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a control frame for a fuel injection device of a diesel engine having engine cylinders arranged in at least one row. The pump nozzle unit is integrated into one pump nozzle unit attached to one engine cylinder, and the pump nozzle unit is movable in the axial direction and acts on various operating parameters. The present invention relates to a control frame having two control frames, the integrated control frame being connectable to an adjustment member installed on the engine.

Such pump nozzle units must be removed and replaced if necessary.

In known arrangements, the following difficulties exist.

In the case of the known arrangement, the difficulty arises in that the adjusting element, which is formed by a control frame extending over the entire length of the engine and which is mounted on the engine, has to be removed.

Not only does this require additional effort, but there is also the risk that the adjustment of the control is changed and a new adjustment is required.

It is therefore an object of the present invention to facilitate the removal and reinstallation of the pump nozzle unit in such an arrangement, and the invention generally provides that the adjusting member mounted on the engine is mounted parallel to the longitudinal axis of the engine. The control frame is movably guided in the housing of the pump nozzle unit approximately perpendicular to the longitudinal axis of the engine, and a lever arm is arranged on the control shaft. , the lever arm engages a slider disposed on the control frame, the plurality of control frames are laterally offset from each other when viewed in the axial direction of the pump nozzle unit, and , at least the slider of the control frame near the nozzle, at least the control axis remote from the nozzle, does not intersect when the control frame is pulled back.

According to this method, even if the pump nozzle unit is equipped with two control frames, it is possible to easily take out the pump nozzle unit after loosening the screws.

This is because no part of the control shaft is in the middle of being removed.

In this case, the tilting lever is moved laterally in a manner known per se.

The basic principle is that the control frame integrated into the pump nozzle unit is approximately perpendicular to the control axis and is actuated by a lever arm.

When it comes to space, this creates the necessary free space.

In this way, there is no need for time-consuming removal of the control shaft mounted on the engine, and there is no need to disconnect the control frame from the regulator.

This achieves the advantage that the adjustment of the individual pump nozzle units remains unchanged, since the position of the main control rod relative to the engine cylinder head remains the same.

When a new pump nozzle unit is installed, the adjustment of this pump nozzle unit is carried out on the test stand.

The control frame integrated in the pump nozzle unit is used in a customary manner for regulating several operating conditions, such as, for example, the injection quantity and the timing of the start of injection.

According to the invention, the lever arm advantageously has a pin which, viewed from the side in the axial direction of the pump nozzle unit,
It engages in a groove arranged perpendicular to the axis of the control frame, especially in the annular groove of the slider.

By this method, the pin of the lever arm can be easily removed from the groove when removing the pump nozzle unit.

According to a particularly advantageous embodiment of the invention, the slider is adjustably connected to the control frame.

This method makes it possible to adjust the pump nozzle unit without installing it, for example on a test stand.

According to the invention, the lever arm can be firmly clamped onto the control shaft, so that in this case also adjustment of the lever relative to the control shaft can be effected by means of a gauge.

This adjustment can be maintained at all times, and the slider on the control frame of the pump nozzle unit can be adjusted outside of the installation state, so that reinstallation of a repaired pump nozzle unit or installation of a new pump nozzle unit is not necessary for adjustment of the control. It is possible without.

The present invention will be explained in detail below with reference to embodiments of the drawings.

In the arrangement according to FIG. 1, 1 designates a pump nozzle unit, which is inserted into the cylinder head 2 of a series engine 3. In the arrangement according to FIG.

The pump nozzle is driven by a camshaft 4 via a rocker 5.

The rocker 5 is laterally movable on the rocker shaft 6 in a manner not shown, so that the rocker releases the pump nozzle unit upon its removal.

Two control frames 7 and 8 are integrated into the pump nozzle unit 1, in other words, the control frames are passed through the housing of the pump nozzle unit 1.

One of these control frames, in the example control frame 7, controls the injection quantity, and the second, in the example control frame 8, controls the injection time.

A control shaft 9 is attached to the control frame 7, and the control shaft is connected to the engine 3.
It is rotatably mounted on the shaft and rotated by a regulator.

A control shaft 10 is attached to the control frame 8, which control shaft is also rotatably mounted on the engine and is controlled by a regulator.

The two control shafts 9 and 10 extend over the entire length of the series engine 3.

The control frames 7 and 8 are connected to sliders 11 and 12, which have annular grooves 13 and 14 perpendicular to the axis of these control frames, in which the control shafts 9 and 10 are clamped by clips 17. Pin 18 of lever arms 15 and 16
is being involved.

The control frame and the lever arms 15,16 are offset laterally relative to each other in plan view, as shown in FIG. 5, so that the levers 15 and 16 are also laterally offset relative to each other.

As shown in FIGS. 4 and 5, when the control rods 7 and 8 are inserted, the lower control rod 8 does not intersect the upper control shaft 9, and therefore in this state the pump nozzle unit is in the rocker position. After the lateral movement of 5 and the release of the locking screw that is inserted into the hole 19, it can be taken out upwards.

Sliders 11 and 12 are adjustably connected to control rod 7 or 8.

For this purpose, the slides 11 and 12 are formed in one piece with a threaded bolt 20, which is screwed into a threaded hole 21 in the axis of the control rods 7 and 8.

In this way, possible tolerances of the pump nozzle unit itself can be compensated for and the corresponding operating variables can be adjusted correctly.

In the embodiment according to FIG. 2, this adjustment takes place by one or several adjustment plates 22.

Thus, for constant operating parameters, the distance a can be adjusted correctly and precisely.

The embodiment according to FIG. 3 has a plastic plug 2 in the screw hole.
3 is inserted, showing a screw safety device according to the method known by Mr. Shiraki.

As a safety device it is possible to use the well-known plastic ring or to glue the threaded connection.

The embodiment according to FIG. 4 is distinguished from the embodiment according to FIG. 1 simply by the fact that the control rods 7 and 8 are axially close next to each other.

The possibility that the control shafts 9 and 10 are located on the other side of the pump nozzle unit 1 is also indicated here by dashed lines.

[Brief explanation of the drawing]

1 is a cross-sectional view of the upper part of the engine with the pump nozzle unit inserted; FIGS. 2 and 3 are axial sectional views of the control rod of two embodiments of the control rod with a slider; FIG. 5 shows a cross-sectional view of the control shaft of a modified arrangement of the pump nozzle unit, and FIG. 5 shows a plan view of the pump nozzle unit according to FIG. 4 or FIG. 1. 1... Pump nozzle unit, 3...
Engine, 5...Rocker, 7, 8...
・Control rod, 9, 10... Control axis, 11.12.
...Slider, 13, 14...Groove, 15
, 16... Lever arm, 18... Bolt.

Claims (1)

[Scope of Claims] 1. A control frame for a fuel injection device of a diesel engine having engine cylinders arranged in at least one row, and in the structure of the engine cylinder, an injection pump and an injection nozzle are each arranged in one engine cylinder. The pump nozzle unit is integrated into one pump nozzle unit attached to the pump nozzle unit and is movable in the axial direction, and has two control frames that act on various operating parameters. in which the integrated control frame is connectable with an adjustment member mounted on the engine, in which the adjustment member mounted on the engine is supported parallel to the longitudinal axis of the engine and rotates. The control frames 7, 8 are movably guided in the housing of the pump nozzle unit 1 approximately perpendicularly to the longitudinal axis of the engine.
, 10 are arranged with lever arms 15, 16, which lever arms are connected to slides 11.1 arranged in the control frames 7, 8.
2, that the control frames 7, 8 are laterally offset from each other, viewed in the axial direction of the pump nozzle unit 1, and that, viewed in the axial direction of the pump nozzle unit 1, at least one of the nozzles A control frame characterized in that the slider 12 of the nearby control frame 8 does not at least intersect with the control axis 9 remote from the nozzle when the control frame 8 is returned. 2. The lever arms 15, 16 have pins 18, which are arranged in grooves 13.14 perpendicular to the axes of the control frames 7, 8, in particular to engage from the side into the annular grooves of the slides 11.12. A control frame according to claim 1 characterized by: 3. Control frame according to claim 1 or 2, characterized in that the sliders 11, 12 are adjustably connected to the control frames 7, 8. 4. A control frame according to any one of claims 1 to 3, characterized in that the lever arms 15, 16 are firmly clamped onto the control shafts 9, 10.