JP3450520B2 - Equipment for fuel injection pump injection timing and injection quantity detection - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when connecting a fuel injection pump for mechanically driving a plunger forward and backward, to an engine, the actual fuel injection timing of the fuel injection pump is set to a set timing at the time of engine design. The present invention relates to equipment for detecting the injection timing and the injection amount of a fuel injection pump used for connecting so as to match with.

[0002]

2. Description of the Related Art For example, as shown in FIG. 11 (a), in a cam drive shaft 51 (corresponding to a driving rotating body) of an engine 6 for driving a cam shaft 4 of a fuel injection pump 1,
Set angle B of how much the cam drive shaft 51 should rotate from the reference position A2 of B to inject fuel.
Is set as a design value. On the other hand, the reference position A1 is set with respect to the cam shaft 4 of the fuel injection pump 1,
The fuel injection pump 1 is assembled so that fuel is injected when the cam shaft 4 rotates from the reference position A1 by the set angle B described above. As a result, for example, FIG.
As shown in, the cam drive shaft 51 of the engine 6 is temporarily fixed to the reference position A2, the cam shaft 4 is held at the reference position A1, and the reference position A1 of the fuel injection pump 1 and the reference position A2 of the engine 6 are set. To match the cam shaft 4 and the cam drive shaft 5.
1 and the fuel injection pump 1 at a predetermined rotational phase, and then the fuel injection pump 1
Is connected to the engine 6.

Therefore, if the fuel injection pump 1 is accurately assembled so that the fuel is accurately injected when the camshaft 4 rotates with respect to the fuel injection pump 1 by the set angle B described above, As described above, the reference positions A1 and A
The camshaft 4 and the cam drive shaft 51 are connected at a predetermined rotational phase while the two are aligned, and the fuel injection pump 1 is connected to the engine 6
When the cam drive shaft 51 rotates to the set angle B, the fuel is accurately injected from the fuel injection pump 1.
As a result, the actual fuel injection timing of the fuel injection pump 1 matches the set timing when the engine 6 was designed. However, since there is some variation in the assembly accuracy of the fuel injection pump 1, for example, as shown in FIG. 11A, in the fuel injection pump 1, the cam shaft 4 rotates from the reference position A1 at a different angle from the set angle B. The fuel injection pump 1 may be assembled such that the fuel is injected by rotating by the angle B1.

In the above case, for example, as shown in FIG. 11 (a), after connecting the fuel injection pump 1 to the engine 6, the cam drive shaft 51 is manually rotated while the fuel injection pump 1 is actually operated. The fuel injection pump 1 actually injects fuel when the cam drive shaft 51 reaches the set angle B by visually observing the timing of fuel injection (the time when the fuel oil level rises at the fuel discharge port). Then, for example, as shown in FIG. 11B, the connection attitude of the fuel injection pump 1 to the engine 6 is changed and adjusted around the cam shaft 4. As a result, the reference positions A1 and A2 of the fuel injection pump 1 and the engine 6 do not match, but the set angle B of the cam drive shaft 51 and the rotation angle B1 of the cam shaft 4 at which fuel is actually injected match. Yes, the actual fuel injection timing of the fuel injection pump 1 matches the set timing at the time of designing the engine 6.

[0005]

According to the above-mentioned conventional connection method, the operator visually confirms the timing at which the fuel injection pump actually injects fuel with the fuel injection pump once connected to the engine. Then, the process of loosening the connection of the fuel injection pump to the engine, changing and adjusting the connection attitude of the fuel injection pump, and connecting the fuel injection pump to the engine again must be repeated.

As described above, it takes a lot of time for the worker to repeat the process of loosening the connection of the fuel injection pump to the engine to change the connection posture or connecting the fuel injection pump to the engine again. There is room for improvement because it is necessary and time-consuming. According to the present invention, when the fuel injection pump is connected to the engine, the connection time is short and hassle-free so that the actual fuel injection timing of the fuel injection pump coincides with the set time when the engine is designed. An object of the present invention is to provide equipment for detecting the injection timing and injection amount of a fuel injection pump that can be effectively used.

[0007]

According to a first aspect of the present invention, there is provided a support base on which a fuel injection pump is installed and fixed, a main shaft connected to a cam shaft of the fuel injection pump on the support base, and the main shaft. A high-speed motor for rotationally driving at high speed without a clutch, a low-speed motor for rotationally driving the main shaft at a low speed through a clutch, a rotary encoder for detecting the rotational speed of the main shaft, and fuel injection on a support base. A fuel injection amount detection device to which a plurality of detection pipes derived from respective plungers of the pump are connected, and an injection sensor for detecting fuel injection timing connected to one detection pipe of a detection pipe group via a switching valve And a control device to which the detection data from the injection sensor and the information from the fuel injection amount detection device are input.

The present invention according to claim 2 provides the invention according to claim 1.
In the invention of claim 1, a hand device for rotating and operating an adjusting bolt for the maximum rotation speed of the governor provided in the fuel injection pump on the support base is provided, and the control device of the hand device is used as the detection control device. It is connected.

With the above construction, as shown in FIG. 3, for example, the drive rotor 25 of the engine 6 has the reference position A2 set, and the drive rotor 25 has the reference position A2.
From the fuel injection pump 1
The set angle B indicating whether fuel should be injected from is set as a design value. Also in the camshaft 4 of the fuel injection pump 1, for example, a reference position A1 is set as shown in FIG. 2A, and when the camshaft 4 rotates from the reference position A1 by the above-mentioned set angle B, the fuel injection pump 1 The fuel injection pump 1 is assembled so that fuel is injected from the fuel injection pump 1. However, due to variations in the assembly accuracy of the fuel injection pump 1, the fuel injection pump 1 may be assembled such that fuel is injected when the cam shaft 4 reaches an angle different from the set angle B described above. .

Therefore, for example, as shown in FIG. 2A, when the cam shaft 4 of the fuel injection pump 1 is rotationally driven and the cam shaft 4 rotates from the reference position A1 of the case 2 by an angle, the cam shaft 4 is actually rotated. Whether the fuel is injected is detected as the rotation angle B1, and the angle difference C between the set angle B and the detected rotation angle B1 is detected. Next, for example, as shown in FIG. 2B, the cam shaft 4 is moved from the reference position A1 of the case 2 to the angular difference C.
Rotate the camshaft 4 at this angle B2.
It is fixed to the case 2 by. By the above operation, the adjustment of the cam shaft 4 in the fuel injection pump 1 is completed.

With the cam shaft 4 fixed as described above, the cam shaft of the fuel injection pump 1 is tilted while the case 2 of the fuel injection pump 1 is tilted forward and backward around the cam shaft 4 as shown in FIG. 4 and the driving rotary body 25 of the engine 6 are interlocked and coupled at a predetermined rotation phase of the cam shaft 4 and the driving rotary body 25 (for example, in the configuration shown in FIG.
a, 40a, 41a), the case 2 of the fuel injection pump 1 is placed in the engine 6 in this inclined posture.
Connect to.

In the conventional connecting method shown in FIGS. 11A and 11B, the fuel injection pump 1 is connected to the engine 6 while the cam shaft 4 of the fuel injection pump 1 is held at the reference position A1. On the other hand, in the connecting method of the above [1], as shown in FIG. 2B, for example, the cam shaft 4 of the fuel injection pump 1 is rotated not by the reference position A1 but by the aforementioned angle difference C from the reference position A1. The fuel injection pump 1 is connected to the engine 6 by fixing the camshaft 4 at the angle B2. This allows
For example, as shown in FIG. 3, since the angle B2 is the apparent reference position, if the camshaft 4 is fixed at the angle B2,
The rotation angle B1 of the cam shaft 4 at which the fuel is actually injected matches the set angle B.

Therefore, when the fuel injection pump 1 is connected to the engine 6 only once in this state, the rotation angle B1 of the cam shaft 4 at which the fuel is actually injected becomes equal to the set angle B of the drive rotor 25 of the engine 6. Match. As a result, FIG.
(A) Like the conventional connection method shown in (b), after the fuel injection pump 1 is once connected to the engine 6, the rotation angle B1 of the camshaft 4 at which fuel is actually injected matches the set angle B. So that the connection of the fuel injection pump 1 to the engine 6 is loosened, the connection attitude of the fuel injection pump 1 is changed and adjusted,
It is not necessary to repeat the process of connecting the fuel injection pump 1 to the engine 6 again.

As a result, by fixing the cam shaft of the fuel injection pump to an angle rotated by the angle difference detected from the reference position, the fuel is actually injected by connecting the fuel injection pump to the engine only once. It is possible to match the rotation angle of the camshaft to the set angle of the driving rotor of the engine. This eliminates the need to repeat the process of once connecting the fuel injection pump to the engine, loosening the connection again, changing and adjusting the connection attitude of the fuel injection pump, and connecting again, which saves time and labor for the operator. It can be omitted, and productivity can be improved.

After the fuel injection pump is connected to the engine, if the fuel injection pump is once detached from the engine and then reconnected, the alignment mark and the positioning mark rotate the camshaft where fuel is actually injected. Since the angle can be easily matched with the set angle of the drive rotor of the engine, the maintainability can be improved.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. (1) FIG. 1 shows the entire fuel injection pump 1, and a case 2 is provided with four plungers 3 oriented up and down in FIG. 1 and one cam shaft 4 for driving the plunger 3 forward and backward. A governor device 5 for controlling the amount is connected to a lateral side surface of the fuel injection pump 1. The engine 6 to which the fuel injection pump 1 is connected is of a diesel type, and as shown in FIG. 3, a drive gear case 7 is provided in the front part of the engine 6, and a drive gear case 7 extending from a lateral wall of the engine 6 is provided. The fuel injection pump 1 is connected.

(2) Next, a facility for detecting the actual fuel injection timing in the fuel injection pump 1 and detecting and adjusting the fuel injection amount will be described. As shown in FIG. 1, a support base 9 on which the fuel injection pump 1 is installed and fixed, and a main shaft 10 connected to the cam shaft 4 of the fuel injection pump 1 of the support base 9 are provided, and the main shaft 10 and the belt transmission are provided. A high speed motor 12 connected via a mechanism 11 and a low speed motor 1 connected via a main shaft 10 with a belt transmission mechanism 13 and a clutch 14.
5, a rotary encoder 16 for high rotation that detects the rotational speed of the main shaft 10, and a rotary encoder 17 for low rotation that accurately detects the angle of the main shaft 10 are provided.

The detection pipe 18 from each of the four plungers 3 of the fuel injection pump 1 has a fuel injection amount detection device 19
A switching valve 20 is provided in one detection pipe 18, and an injection sensor 21 for detecting a fuel injection timing is connected to the switching valve 20, and a control device 22 for inspection is provided. For adjusting the fuel injection amount of the fuel injection pump 1, a hand device 23 for adjusting and operating the first, second, third, fourth adjusting bolts 31, 32, 33, 34 of the governor device 5 shown in FIG. 5, and a hand device 23. A control device 24 is provided. The tip of the hand device 23 is connected to a pawl support portion 26 which is rotatable about the axis P1 and is connected to the pair of clamping pawls 2.
7 is a claw support portion 26 slidably in the vertical direction of the paper surface of FIG.
Supported by.

(3) In the fuel injection pump 1, the actual fuel injection timing is detected, the fuel injection amount is detected and adjusted, and then the fuel injection pump 1 is connected to the engine 6. First, the detection of the actual fuel injection timing will be described (see FIGS. 8 and 9). As shown in FIG. 3, the crankshaft 2 of the engine 6 that drives the camshaft 4 of the fuel injection pump 1
5 (corresponding to the driving rotary body), the position where the piston (not shown) of the predetermined cylinder is the top dead center is the reference position A2.
And the set angle B of how much the crankshaft 25 rotates from the reference position A2 to inject fuel from the fuel injection pump 1 is set as a design value.

On the other hand, the camshaft 4 of the fuel injection pump 1 also has a reference position A1 on the case 2 as shown in FIG.
(Position facing the same direction as the plunger 3) is set, and when the camshaft 4 (key groove 4a) rotates from the reference position A1 by the above-mentioned set angle B, a predetermined cylinder (piston) corresponding to the above-mentioned predetermined cylinder is formed. The fuel injection pump 1 is assembled so that fuel is injected from the plunger 3.
However, due to variations in the assembly accuracy of the fuel injection pump 1, the fuel injection pump 1 is assembled so that fuel is injected when the camshaft 4 (key groove 4a) reaches an angle different from the set angle B described above. Sometimes.

As shown in FIG. 1, the assembled fuel injection pump 1 is fixed to a support 9 in a vertical posture, and a main shaft 10 is connected to a cam shaft 4 of the fuel injection pump 1 by a key (not shown) ( Step S1). In this case, the main shaft 10 is slowly rotated by the low speed motor 15 as shown in FIG.
As shown in FIG. 2 (a), when the key groove 4a of the cam shaft 4 is set to face vertically upward (the reference position A of the case 2
1 in a state where the key groove 4a is located), the cam shaft 4 (the key groove 4
The position a) is detected by the rotary encoder 17 and is stored in the control device 22 as the reference position A1 (step S2). Next, the switching valve 20 shown in FIG. 1 is switched to the injection sensor 21 side (step S3), and the main shaft 10 is rotationally driven by the high speed motor 12 at the rated rotation speed of the engine 6 (for example, 1500 rpm) (step S3).
4) The fuel injected from the predetermined plunger 3 is detected by the injection sensor 21.

As a result, as shown in FIG. 2A, when the cam shaft 4 (key groove 4a) is rotated from the reference position A1 of the case 2 by an angle, fuel is injected from the predetermined plunger 3. Is detected by the injection sensor 21 and the rotary encoder 16, and this angle is stored in the control device 22 as the rotation angle B1 (step S
5). Then, the angle difference C between the set angle B and the detected rotation angle B1 is detected, and this angle difference C is stored in the control device 22 (step S6).

(4) Next, detection and adjustment of the fuel injection amount of the fuel injection pump 1 will be described. When the angle difference C is stored as in the previous item (3) (step S6), the detection of the fuel injection amount is started, and the fuel injection pump 1 is fixed to the support base 9 as shown in FIG. Then, the switching valve 20
Is switched to the fuel injection amount detection device 19 side (step S7).

Next, the main shaft 10 is rotated by the high speed motor 12 at the maximum rotation speed (for example, 108% of the above-mentioned rated rotation speed), and the fuel injection amount injected from the four plungers 3 at this time Detected by the injection amount detection device 19,
By averaging the detected values, the fuel injection amount of one plunger 3 at the maximum rotation speed is detected. Hereafter, the same work as above is performed at the rated speed and 60% of the rated speed.
Number of revolutions and minimum number of revolutions (eg 650 rpm) 3
The same operation is performed for the rotational speeds of various types, and the fuel injection amount of one plunger 3 at the above-described four rotational speeds is stored in the control device 22 (steps S8 and S9).

In this case, how much the fuel injection amount of the plunger 3 at the above-mentioned four kinds of rotation speeds should be is set in advance as the four kinds of set fuel injection amounts (design values). ing. As a result, the fuel injection amounts at the four types of rotational speeds detected as described above are compared with the set fuel injection amounts, and the set fuel injection amount and the detected fuel injections are performed at the four types of rotational speeds described above. The injection amount difference D from the injection amount is detected and stored in the control device 22 (step S1).
0).

(5) When the injection amount difference D of four kinds of rotation speeds is detected as described in (4) above, the spindle 10 is stopped and the injection amount difference D is changed from the control device 22 to the hand device. Two
3 to the control device 24. In order to make the injection amount difference D zero on the basis of the injection amount difference D sent by the control device 24, the first to fourth adjustment bolts 31 to 34 shown in FIG.
Is set to a rotation operation position, which is how much the rotation operation position from the assembly angle (current angle) to the positive side or the reverse side should be set (step S11), and the hand operation is performed based on this rotation operation position. The device 23 is operated as described below. The above-mentioned angle at the time of assembling is an angle before the fuel injection pump 1 is fixed to the support base 9, and is input to the control device 24 in advance.

As a result, as shown in FIG.
Is slid to the outside, and the hand device 23 moves the holding claw 2
First, the tip of 7 is positioned on the head of the first adjusting bolt 31 for maximum rotation speed, and the holding claw 27 is slid inward to hold the head of the first adjusting bolt 31. After that, the pawl support portion 26 is rotated around the axis P1, and the first adjustment bolt 3 is moved to the rotation operation position corresponding to the injection amount difference D for the maximum rotation speed.
1 is rotated (step S12), and in the link mechanism 8 that controls the control rack (not shown), the position of the portion corresponding to the maximum rotation speed is changed by the first adjustment bolt 31 to change the maximum rotation speed. Adjustment of the fuel injection amount corresponding to the number is performed.

As shown in FIG. 5, the first to fourth adjusting bolts 31 to 34 are fixed to the first and second lock nuts 3 respectively.
5, 36 are provided, and the holding claw 27 of the hand device 23 holds the first lock nut 35 after the rotation operation of the first adjustment bolt 31, and tightens and fixes the first lock nut 35 with a predetermined tightening torque. (Step S13). When the first lock nut 35 is tightened and fixed in this way,
Along with this tightening, the first adjusting bolt 31 also slightly rotates. Therefore, it is possible beforehand by an experiment to say how much tightening torque the first lock nut 35 should be tightened and fixed to rotate the first to fourth adjusting bolts 31 to 34 (change angle). Demanded, Figure 1
As shown by the four solid lines of 0, the tightening torque of each first lock nut 35 and the change angles of the first to fourth adjustment bolts 31 to 34 are obtained as a correlation.

As a result, the holding claw 27 of the hand device 23
When the first adjustment bolt 31 is rotated to the rotation operation position, the injection amount difference D for the maximum rotation speed becomes zero in anticipation that the first adjustment bolt 31 rotates with the tightening of the first lock nut 35. The rotational operation position of the first adjustment bolt 31 is set to the front side by an amount corresponding to the change angle obtained from the correlation shown in FIG. Therefore, when the first lock nut 35 is tightened and fixed with a predetermined tightening torque after the first adjustment bolt 31 is rotated to the rotation operation position, the first adjustment bolt 31 is rotated from the rotation operation position accordingly, The angle at which the injection amount difference D for the maximum rotation speed becomes zero is reached.

The above adjustment is similarly performed for the other second to fourth adjusting bolts 32 to 34 (steps S11 to S13), and the fuel injection amount corresponding to the rated rotation speed is adjusted by the second adjusting bolt 32. Adjustment, third adjustment bolt 33
Adjusts the fuel injection amount corresponding to a rotation speed of 60% of the rated rotation speed, and adjusts the fuel injection amount corresponding to the minimum rotation speed by the fourth adjusting bolt 34.

As described above, the first to fourth adjusting bolts 3
When the adjustments by 1 to 34 are completed, the cam shaft 4 of the fuel injection pump 1 is rotationally driven again at four types of rotational speeds as in (4) above, and the injection amount difference D of the four types of rotational speeds is detected again. (Step S14). In this case, when all of the injection amount differences D of the four types of rotational speeds are within the set range (step S15), it is determined that the adjustment of the fuel injection amount in the fuel injection pump 1 is completed, and the hand device 23. The second lock nut 36 is held and clamped and fixed by the holding claw 27 (step S16). Conversely, step S15
If there is a rotation speed at which the injection amount difference D is not within the set range, the first lock nut 35 corresponding to the rotation speed is loosened by the hand device 23 (step S28), and the process returns to step S10 to The fuel injection amount corresponding to the rotation speed is readjusted.

(6) Next, the connection of the fuel injection pump 1 to the engine 6 will be described. When the adjustment of the fuel injection amount in the fuel injection pump 1 is completed as described above, the low-speed motor 15 and the rotary encoder 17 shown in FIG. , The camshaft 4 as shown in FIG.
The (key groove 4a) is rotated from the reference position A1 of the case 2 by the angle difference C, and the cam shaft 4 is stopped at the angle B2 (step S17).

As shown in FIG. 2B, when the rotation angle B1 is on the upper side (counterclockwise side of the drawing) of the set angle B, the cam shaft 4 (key groove 4a) moves from the reference position A1 of the case 2. The camshaft 4 (key groove 4a) is rotated to the same side as described above (counterclockwise in the plane of the drawing), and conversely, if the rotation angle B1 is the lower side of the set angle B (clockwise in the plane of the drawing). Is rotated from the reference position A1 of the case 2 to the same side (clockwise direction in the drawing) as described above.

When the camshaft 4 stops in this way, FIG.
As shown in (b) and FIG. 4, the camshaft 4 (key groove 4a) is fixed at this angle B2 by the set bolt 28 (corresponding to a fixture) (step S18) (corresponding to the third step). After this, the cam shaft 4 is removed from the main shaft 10, and the fuel injection pump 1 is removed from the support base 9 (step S1).
9). In this case, the outer periphery of the cam shaft 4 is knurled to form the anti-slip portion 4b, and the tip of the set bolt 28 is brought into contact with the anti-slip portion 4b of the cam shaft 4 to fix the anti-slip portion 4b. Later camshaft 4
Does not slip and rotate from the angle B2.

As shown in FIG. 4, a bearing 29 is externally fitted to the end of the cam shaft 4, and a support plate 30 and a screw 37 allow
The bearing 29 is attached to the case 2 of the fuel injection pump 1. As a result, the camshaft 4 is set bolt 28
After fixing with, the third drive gear 39 is fixed to the end of the cam shaft 4 with the key 38 as shown in FIGS. 4 and 2C (step S20).

On the other hand, as shown in FIGS. 3 and 4, with the cover 7a of the drive gear case 7 opened, the crankshaft 25 of the engine 6 (the first drive gear 41 is fixed) is used as a reference. Temporarily fix at position A2 (step S21),
The second drive gear 40 is supported by the drive gear case 7 (step S22). The second drive gear 40 is engraved with a pair of match marks 40a that are 180 ° out of phase with each other.
The second drive gear 40 is engaged with the first drive gear 41 so that the one alignment mark 40a matches the alignment mark 41a engraved on the drive gear 41.

Next, as shown in FIGS. 3 and 4, the support plate 30 of the fuel injection pump 1 is provided in the opening 7b of the drive gear case 7.
While inserting the third drive gear 39 and the third drive gear 3
While tilting the case 2 of the fuel injection pump 1 in the forward and reverse directions around the cam shaft 4 so that the matching mark 39a of 9 corresponds to the other matching mark 40a of the second drive gear 40 (in the configuration shown in FIG. Clockwise), the third drive gear 39 to the second
The drive gear 40 is engaged and the case 2 of the fuel injection pump 1 is applied to the drive gear case 7 (step S23).
(Corresponding to a fourth step of connecting the cam shaft 4 of the fuel injection pump 1 to the crank shaft 25 of the engine 6 at a predetermined rotation phase of the cam shaft 4 and the crank shaft 25).

As shown in FIG. 4, three bolt holes 7c are formed around the opening 7b of the drive gear case 7, and
As shown in (a), in the case 2 of the fuel injection pump 1, three elongated holes 2a are formed at positions facing the bolt holes 7c of the drive gear case 7. As a result, as shown in FIG. 3, the alignment mark 39a of the third drive gear 39 becomes the second mark.
3 and 4 in a state where the case 2 of the fuel injection pump 1 is tilted in the forward and reverse directions around the cam shaft 4 so as to be aligned with the other matching mark 40a of the drive gear 40 and is applied to the drive gear case 7. 4, the bolt 42 is inserted into the bolt hole 7c of the drive gear case 7 from the long hole 2a of the case 2, and the fuel injection pump 1 is connected and fixed to the drive gear case 7 by the bolt 42 (step S24) (corresponding to the fifth step). ).

As shown in FIG. 2A, an alignment mark 2b is pre-marked at a predetermined position of the case 2 of the fuel injection pump 1, and the fuel injection pump 1 is driven by the bolt 42 as shown in FIG. When connected and fixed to the gear case 7 (step S24), the positioning mark 7d is engraved on the portion of the drive gear case 7 corresponding to the alignment mark 2b of the case 2 (step S25) (corresponding to the sixth step). When the above operation is completed, the lid portion 7a of the drive gear case 7 is closed (step S26), the set bolt 28 of the fuel injection pump 1 is removed, and the crankshaft 25 of the engine 6 is temporarily fixed. (Step S27), which completes the connection of one fuel injection pump 1 to the engine 6.

When the connection of the fuel injection pump 1 to the engine 6 is completed as described above, the first to fourth adjusting bolts 31 to 34 are sealed as described below.
A general user may not be able to adjust the first to fourth adjustment bolts 31 to 34. As shown in FIGS. 6 and 7, a metallic cylindrical pipe 43 having a pair of notches 43a is prepared, and the pipe 43 is divided into first to fourth parts.
The adjustment bolts 31 to 34 are attached to the neck portion 3 of the first lock nut 35.
The pipe 43 is covered up to 5a (circular cross section), and the portion of the pipe 43 on the far side from the notch 43a is crushed by a tool such as pliers, and this portion is pressed against the neck portion 35a of the first lock nut 35. As a result, the pipe 43 covers the first to fourth adjustment bolts 31 to 34, and the first to fourth adjustment bolts 31 to 34 cannot be adjusted.
The portion a is caught by the first lock nut 35 and the pipe 43 cannot be pulled out.

[Other Embodiments] In the above embodiment, the camshaft 4 of the fuel injection pump 1 and the crankshaft 25 of the engine 6 are connected to the first to third drive gears 41,
Although it is configured to be interlocked with each other via 40 and 39, the end portion of the cam shaft 4 of the fuel injection pump 1 and the engine 6
The end of the side drive shaft (corresponding to the drive rotating body) (not shown) may be butted and connected by one key (not shown).

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a diagram showing an entire facility for detecting a fuel injection timing of a fuel injection pump and detecting and adjusting a fuel injection amount.

FIG. 2 is a diagram showing a flow from detection of a rotation angle of a cam shaft where fuel is actually injected to fixing of the cam shaft and attachment of a third drive gear in the fuel injection pump.

FIG. 3 is a diagram showing a state in which a fuel injection pump is connected to an engine after the state shown in FIG. 2;

FIG. 4 is a camshaft end portion and a third portion of the fuel injection pump.
Sectional view near the drive gear

FIG. 5 is a sectional view of the vicinity of a governor device in a fuel injection pump.

FIG. 6 is a perspective view showing a pipe for sealing the first to fourth adjustment bolts.

FIG. 7 is a cross-sectional view showing a state in which a sealing pipe is attached to the first to fourth adjustment bolts.

FIG. 8 is a diagram showing the first half of the flow of connection of the fuel injection pump to the engine.

FIG. 9 is a diagram showing the latter half of the flow of connecting the fuel injection pump to the engine.

FIG. 10: Tightening torque of first lock nut and first to first
The figure which shows the correlation with the change angle of a 4th adjustment bolt.

FIG. 11 is a diagram showing a state in which a fuel injection pump is connected to an engine in a conventional connecting method.

[Explanation of symbols]

1 Fuel Injection Pump 3 Fuel Injection Pump Plunger 4 Fuel Injection Pump Camshaft 9 Support 10 Spindle 12 High Speed Motor 14 Clutch 15 Low Speed Motor 16 Rotary Encoder 17 Rotary Encoder 18 Detection Pipe 19 Fuel Injection Amount Detection Device 20 Switching Valve 21 Injection Sensor 22 Control device 23 Hand device 24 Control device

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-88961 (JP, A) Actually opened 59-159782 (JP, U) Actually opened 56-175568 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) F02M 59/44 F02B 67/04 F02M 39/02 F02M 65/00 301

Claims (2)

(57) [Claims] 1. A support base (9) on which a fuel injection pump (1) is installed and fixed, and a main shaft (10) connected to a cam shaft (4) of the fuel injection pump (1) on the support base (9). And a high speed motor (12) for rotationally driving the main shaft (10) at high speed without passing through a clutch, and the main shaft (10).
A low speed motor (15) for rotationally driving at low speed via the clutch (14), rotary encoders (16) and (17) for detecting the number of rotations of the main shaft (10), and fuel on the support base (9). Each plunger (3) of the injection pump (1)
A fuel injection amount detection device (19) to which a plurality of detection pipes (18) derived from the above are connected, and one detection pipe (18) in the detection pipe (18) group via a switching valve (20). An injection sensor (21) for detecting the fuel injection timing, which is connected, and a control device (22) to which the detection data from the injection sensor (21) and the information from the fuel injection amount detection device (19) are input A facility for detecting the injection timing and the injection amount of the fuel injection pump, which is characterized by being provided. 2. A hand device for rotationally operating the adjusting bolts (31) to (34) for the maximum rotation speed of the governor (5) provided on the fuel injection pump (1) on the support base (9). 23. The equipment for detecting the injection timing and the injection amount of the fuel injection pump according to claim 1, further comprising: 23), wherein the control device (24) of the hand device (23) is connected to the control device (22) for detection. .