JPH05222955A - Governor device of diesel engine - Google Patents

Abstract

PURPOSE:To increase the degree of arrangement freedom of an engine stop operation means by making constitution that when a quantity regulating rack pin is linked from a predetermined fuel injection position to an engine stop position, an elongated hole portion for slide may be slid by means of the guide of a slide guide pin. CONSTITUTION:An energizing spring 8 whose spring force is weaker than that of the governor spring 7 of a governor lever 4, is interposed between a fixing portion 47 and one of a quantity regulating rack 10, a quantity regulating rack pin 2 and a linking rod 3, and the fuel quantity reducing side end portion 9 of a long hole portion 9 for slide is pressingly brought into contact with a slide guide pin 5 by means of its tension. When the force of stop operation 12 in a fuel quantity reducing direction is given from an engine stop operation means 11 to one of the quantity regulating rack 10, the quantity regulating rack pin 2 and the liking rod 3 and the quantity regulating rack pin 2 is linked from a predetermined fuel injection position 13 to an engine stop position 14, the elongated hole portion 6 for slide is slid in a fuel quantity reducing direction that is a direction indicted by an arrow 37, by the guide of the slide guide pin 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a governor device for a diesel engine.

[0002]

2. Description of the Related Art As a conventional technique for a governor device for a diesel engine, there is a technique disclosed in Japanese Utility Model Publication No. 1-44755. In this, as shown in FIG. 5, the metering rack pin 102 of the fuel injection pump 101 is interlockingly connected to the governor lever 104 via the interlocking rod 103.

In this prior art, the input end of the interlocking rod 103 is pivotally supported by the output end of the governor lever 104 via a pivot pin 105, and the output end of the interlocking rod 103 slides along the fuel increasing / decreasing direction. A long slot 106 for guide is formed, and a long-distance rack pin 102 is slidably fitted into the long slot 106 for slide guide.
02 and the pivot pin 105, an urging spring 108 having a weaker spring force than the governor spring 107 of the governor lever 104 is provided, and the tension of this urging spring 108 allows the metering rack pin 102 to slide and guide. Hole 10
6 is pressed against the fuel-increasing side end portion 109 of the fuel cell 6, and
02 is applied from the engine stop operating means 110 with a stop operating force 111 in the fuel reducing direction, and the metering rack pin 1
When 02 is interlocked from the predetermined fuel injection position 112 to the engine stop position 113, the metering rack pin 102 is slid in the fuel reducing direction by the guide of the slide guide elongated hole portion 106. Incidentally, 114 in the drawing is a governor force.

According to this structure, when the engine stop operating means 110 applies a stop operation force 111 in the fuel reducing direction to the metering rack pin 102, the metering rack pin 102 stops the engine from a predetermined fuel injection position 112. It is interlocked with the position 113, but at this time, the metering rack pin 1
02 slides in the fuel reducing direction by the guide of the slide guide elongated hole portion 106, and the interlocking rod 103 and the cabana lever 1
Since 04 is left behind, the weak tension of the biasing spring 108 only resists, but the strong tension of the governor spring 107 does not resist. Therefore, the engine stop operation can be performed with a small stop operation force.

The metering rack pin 102 is slidably fitted in the slide guide slot 106. The metering rack pin 102 is fueled in the slide guide slot 106 by the urging force of the urging spring 108. Increasing side end 109
Since it is pressed against the
The movement of 3 is faithfully transmitted to the metering rack pin 102, and the metering function is not hindered.

[0006]

In the above prior art, if a stop operation force in the fuel reducing direction is applied to the interlocking rod 103, the output end of the governor lever 104 follows the interlocking rod 103 to reduce the fuel amount. Since it is dragged in the direction, the strong tension of the governor spring 107 becomes a resistance, and a large stop operation force is required. Therefore, in order to perform the engine stop operation with a small stop operation force, the stop operation force must be directly applied to the metering rack pin 102,
The arrangement of the engine stop operating means 110 is such that the metering rack pin 1
Limited to the vicinity of 02.

An object of the present invention is to increase the degree of freedom in arranging the engine stop operating means.

[0008]

[Means for Solving the Problems]

(First Invention) As shown in FIG. 1, a first invention is a governor device for a diesel engine, in which a metering rack pin 2 of a fuel injection pump 1 is interlockingly connected to a governor lever 4 via an interlocking rod 3, It is characterized by doing so.

A slide guide pin 5 is fixed to the output end of the governor lever 4, and a slide long hole 6 is formed at the input end of the interlocking rod 3 along the fuel increasing / decreasing direction. 6 is slidably fitted onto the slide guide pin 5, and the pin fitting portion 45 formed at the output end of the interlocking rod 3 is fitted onto the metering rack pin 2 so as not to be slidable.

A biasing spring 8 having a weaker spring force than the governor spring 7 of the governor lever 4 is interposed between the fixed portion 47 and any one of the measuring rack 10, the measuring rack pin 2, and the interlocking rod 3. Then, the fuel reducing side end 9 of the slide long hole 6 was pressed against the slide guide pin 5 by the tension of the biasing spring 8.

A stop operating force 1 in the fuel reducing direction from the engine stop operating means 11 is applied to one of the metering rack 10, the metering rack pin 2 and the interlocking rod 3.
2 is provided and the metering rack pin 2 is interlocked from the predetermined fuel injection position 13 to the engine stop position 14, the slide slot 6 is slid in the fuel reducing direction by the guide of the slide guide pin 5. Configured to let.

(Second Invention) As shown in FIG. 3, the second invention is a governor device for a diesel engine in which a metering rack pin 2 of a fuel injection pump 1 is interlockingly connected to a governor lever 4 via an interlocking rod 3. , Is characterized by the following.

An elongated hole 15 for slide guide is formed at the output end of the governor lever 4 along the fuel increasing / decreasing direction, and a slide pin 16 is fixedly provided at the input end of the interlocking rod 3, and the slide pin 16 is arranged as described above. A pin fitting portion 45 formed at the output end of the interlocking rod 3 was slidably fitted in the slide guide long hole 15 and was slidably fitted on the metering rack pin 2.

A biasing spring 8 having a weaker spring force than the governor spring 7 of the governor lever 4 is interposed between any one of the metering rack 10, the metering rack pin 2, and the interlocking rod 3 and the fixed portion 47. Then, the fuel reducing side end 9 of the slide long hole 6 was pressed against the slide guide pin 5 by the tension of the biasing spring 8.

Then, a stop operating force 12 in the fuel reducing direction is applied from the engine stop operating means 11 to any one of the metering rack 10, the metering rack pin 2 and the interlocking rod 3 so that the metering rack pin 2 can be operated. When the engine is interlocked from the predetermined fuel injection position 13 to the engine stop position 14, the slide pin 16 is slid 38 toward the fuel reduction side by the guide of the slide guide elongated hole portion 15.

[0016]

[Action]

(First invention) As shown in FIG. 1, a stop operating force 12 from the engine stop operating means 11 to a metering rack 10, a metering rack pin 2 or an interlocking rod 3 in a fuel reducing direction.
As shown by the chain line, the metering rack pin 2 is interlocked with the metering rack 10 and the interlocking rod 3 integrally with the engine stop position 14 from a predetermined fuel injection position 13 as shown by the chain line.
Since the slide long hole 6 slides 37 in the fuel reduction direction by the guide of the slide guide pin 5 and the governor lever 4 is left behind, only the weak tension of the biasing spring 8 acts as a resistance and the strong tension of the governor spring 7 is exerted. Does not become a resistance. Therefore, the engine stop operation can be performed with a small stop operation force.

The elongated slot 6 for sliding is slidably fitted on the slide guide pin 5, but the tension of the biasing spring 8 guides the end 9 of the sliding slot 6 on the fuel reducing side. Since it is pressed against the pin 5, the movement of the governor lever 4 is faithfully transmitted to the interlocking rod 3 while the engine is operating, and the metering function is not hindered. Further, the tension rack pin 2 is urged in the fuel increasing direction by the tension of the urging spring 8. Therefore, the urging spring 8 can also be used as a start spring.

(Second invention) As shown in FIG. 3, the engine stop operating means 11 applies a stop operating force 12 in the fuel reducing direction to one of the metering rack 10, the metering rack pin 2 and the interlocking rod 3. Then, the metering rack pin 2 is interlocked with the metering rack 10 and the interlocking rod 3 from the predetermined fuel injection position 13 to the engine stop position 14, and at this time, the slide pin 16 of the slide guide elongated hole 15 is formed. The guide slides 38 in the fuel reduction direction, and the governor lever 4 is left behind. Therefore, the weak tension of the biasing spring 8 only acts as resistance, but the strong tension of the governor spring 7 does not act as resistance. Therefore, the engine stop operation can be performed with a small stop operation force.

Although the slide pin 16 is slidably fitted in the slide guide elongated hole portion 15, the slide pin 16 is moved by the tension of the biasing spring 8 to the end of the slide guide elongated hole portion 15 on the fuel increasing side. Since it is pressed against the portion 17, the movement of the governor lever 4 is faithfully transmitted to the interlocking rod 3 while the engine is operating, and the metering function is not hindered. Further, the tension rack pin 2 is urged in the fuel increasing direction by the tension of the urging spring 8. Therefore, the urging spring 8 can also be used as a start spring.

[0020]

The first and second inventions have the following effects. Regardless of whether the stop operation force is applied to the metering rack, the metering rack pin, or the interlocking rod, the engine can be stopped with a small stop operation force without receiving the resistance of the strong tension of the governor spring. Therefore, the arrangement of the engine stop operating means is not limited only to the vicinity of the metering rack pin, and the degree of freedom of the arrangement is high. The tension of the biasing spring biases the metering rack pin in the fuel increasing direction, so that this biasing spring can also be used as a start spring. Therefore, the number of parts can be reduced.

[0021]

Embodiments of the present invention will be described with reference to the drawings.
First, the first embodiment will be described. FIG. 1 is a schematic diagram of a governor device according to a first embodiment of the present invention. FIG. 2 is a vertical sectional side view of a peripheral portion of the governor device according to the first embodiment of the present invention.

In FIG. 2, reference numeral 1 is a fuel injection pump,
18 is a pump room. The fuel injection pump 1 is a Bosch type, and a metering rack 10 is provided on the side of the pump body 19.
Is slidably attached in the fuel increasing / decreasing direction, and a metering rack pin 2 is fixedly provided on the lateral side of the metering rack 10. An injection cam shaft 20 is installed below the fuel injection pump 1, a tappet 22 of the fuel injection pump 1 is placed on an injection cam 21 of the injection cam shaft 20, and a cam is provided at the end of the injection cam shaft 20. The shaft input gear 23 is externally fitted and fixed. The camshaft input gear 23 is interlocked with a crank gear (not shown) via an idle gear (not shown).

According to this structure, the rotation of the crankshaft is controlled by the crank gear, the idle gear, and the camshaft input gear 23.
Are sequentially transmitted to the injection cam shaft 20 and the injection cam 21
As a result, the tappet 22 is pushed up at a predetermined timing, and fuel is injected by operating the pump. The fuel injection amount of the fuel injection pump 1 is adjusted by sliding the metering rack 10 in the fuel increasing / decreasing direction.

The sliding movement of the metering rack 10 is performed from the speed control lever 24 via a governor device. The structure of this governor device is as follows. A governor shaft 26 is installed in a governor chamber 25 provided on the front side of the pump chamber 18, and a spring lever 39 and an interlocking lever 40 are swingably supported on the governor shaft 26. The spring lever 39 and the interlocking lever 40 constitute the governor lever 4. The governor spring 7 is provided between the spring lever 39 and the speed control lever 24. A plurality of governor weights 27 are swingably supported on the camshaft input gear 23. A slide guide hole 28 is formed in the injection cam shaft 20 along its axis, and a slide rod 29 is slidably inserted therein. The engaging portion 30 recessed in the governor weight 27 is engaged with the flange 31 fixed to the sliding rod 29, and the tip end portion of the sliding rod 29 is brought into contact with the interlocking lever 40 from the rear side.
Further, as shown in FIG. 1, the spring lever 39 is brought into contact with the interlocking lever 40 from the front side thereof via the contact bolt 41 and the torque spring 42. Interlocking lever 40
The measuring rack pin 2 is interlocked with the interlocking rod 3 via the interlocking rod 3.

According to this structure, as shown in FIG. 2, when the speed adjusting lever 24 is swung to a predetermined speed adjusting position, the governor spring 7 is pulled, and the tension thereof is the spring force in the fuel increasing direction. 32 is attached to the governor lever 4. Further, since the governor weight 27 rotates together with the camshaft input gear 23, its centrifugal force is applied to the governor lever 4 as the governor force 33 in the fuel reducing direction via the engaging portion 30, the flange 31, and the sliding rod 29 in this order. It Then, the governor lever 4 swings so as to balance the spring force 32 and the governor force 33, and the movement is transmitted to the metering rack pin 2 via the interlocking rod 3, and the metering rack 10 slides in the fuel increasing / decreasing direction. The fuel injection amount of the fuel injection pump 1 is adjusted. In addition, in FIG. 1 and FIG.
Reference numeral 43 is a fuel limiting bolt, and 44 is an abutting portion of the spring lever 39 that abuts against the bolt. The swing of the spring lever 39 is stopped, and the elastic restoring force of the torque spring 42 swings only the interlocking lever 40 in the fuel increasing direction to increase the torque.

In this governor device, an engine stop operation is performed with a small stop operation force, so that the following measures are taken. A slide guide pin 5 is fixed to the lateral side of the output end of the governor lever 4, and a slide slot 6 is formed at the input end of the interlocking rod 3 along the fuel increasing / decreasing direction. The slide long hole 6 is slidably fitted on the slide guide pin 5. A pin fitting portion 45 formed at the output end of the interlocking rod 3 is non-slideably fitted onto the metering rack pin 2. A biasing spring 8 having a weaker spring force than the governor spring 7 is provided between the interlocking rod 3 and the spring locking portion 46 fixed to the governor chamber wall 48. The fuel reducing side end 9 of the slide long hole 6 is pressed against the slide guide pin 5.

The linear solenoid 3 is provided in the pump chamber 18.
4, the tip of a rod 36 protruding from the solenoid main body 35 in the fuel reduction direction when energized is made to face the fuel increase side end of the metering rack 10, and the rod 36 projects to the fuel reduction rack 10 in the fuel reducing direction. When the metering rack pin 2 is interlocked with the engine stop position 14 from the predetermined fuel injection position 13 by applying the stop operation force 12 of
Is slid in the fuel reduction direction by the guide of the slide guide pin 5.

According to this structure, the rod 36 is projected from the solenoid body 35, and as shown in FIG.
Stop operation force 12 in the fuel reduction direction for the metering rack 10
As shown by the chain line, the metering rack pin 2 is interlocked with the metering rack 10 and the interlocking rod 3 integrally with the engine stop position 14 from a predetermined fuel injection position 13 as shown by the chain line.
Since the slide long hole 6 slides 37 in the fuel reduction direction by the guide of the slide guide pin 5 and the governor lever 4 is left behind, only the weak tension of the biasing spring 8 acts as a resistance and the strong tension of the governor spring 7 is exerted. Does not become a resistance.

Although the sliding long hole portion 6 is slidably fitted on the slide guide pin 5, the fuel reducing side end portion 9 of the sliding long hole portion 6 is slide-guided by the tension of the biasing spring 8. Since it is pressed against the pin 5, the movement of the governor lever 4 is faithfully transmitted to the interlocking rod 3 while the engine is operating, and the metering function is not hindered. Further, the tension rack pin 2 is urged in the fuel increasing direction by the tension of the urging spring 8. Therefore, the urging spring 8 also functions as a start spring, and when the engine is stopped,
The tension causes the metering rack pin 2 to be positioned at the starting amount increasing position.

Next, the second embodiment will be described. Figure 3
FIG. 6 is a schematic view of a governor device according to a second embodiment of the present invention. FIG. 4 is a vertical sectional side view of a peripheral portion of a governor device according to a second embodiment of the present invention.

The second embodiment differs from the first embodiment in the following points. As shown in FIG. 4, a slide guide slot 15 is formed at the output end of the interlocking lever 40 along the fuel increasing / decreasing direction. A slide pin 16 is fixed to the side of the input end of the interlocking rod 3. The slide pin 16 is slidably fitted in the slide guide elongated hole portion 15. Then, the slide pin 16 is pressed against the fuel increase side end 17 of the slide guide elongated hole portion 15 by the tension of the biasing spring 8 which is weaker in spring force than the governor spring 7 connected to the spring lever 39.

According to this structure, when the rod 36 is projected from the solenoid body 35 and the stop operation force 12 in the fuel reducing direction is applied to the metering rack 10 as shown in FIG. As described above, the metering rack pin 2 is interlocked with the metering rack 10 and the interlocking rod 3 so as to be interlocked with the engine stop position 14 from the predetermined fuel injection position 13. At this time, the slide pin 16 moves the slide guide elongated hole portion 15 Slide in the direction of fuel reduction with the guidance of the
Is left behind, the weak tension of the biasing spring 8 only resists, but the strong tension of the governor spring 7 does not resist.

The slide pin 16 is slidably fitted in the slide guide elongated hole portion 15. However, the slide pin 16 is driven by the tension of the urging spring 8 so that the end of the slide guide elongated hole portion 15 on the fuel increase side. Since it is pressed against the portion 17, the movement of the governor lever 4 is faithfully transmitted to the interlocking rod 3 while the engine is operating, and the metering function is not hindered. Further, the tension rack pin 2 is biased in the fuel increasing direction by the tension of the bias spring 8, so that the bias spring 8 also functions as a start spring, and while the engine is stopped, the tension rack pin 2 is acted on by the tension. Position 2 in the starting increase position.

The contents of each embodiment of the present invention are as described above, but the present invention is not limited to the above-mentioned embodiments. For example, in each of the embodiments, the biasing spring 8 is provided between the interlocking rod 3 and the fixed portion 47, but this is not limited to the adjustment rack 10, the adjustment rack pin 2, and the interlocking rod 3 and the fixed portion. It suffices to interpose it with 47. Further, in each of the embodiments, the linear solenoid 34 is used as the engine stop operating means 11, but this may be a manual operating lever or the like. Further, in each embodiment, the metering rack 1
Although the stop operating force 12 is applied to 0, the stop operating force 12 is applied to the metering rack 10, the metering rack pin 2,
It may be applied to any of the interlocking rods 3.

[Brief description of drawings]

FIG. 1 is a schematic view of a governor device according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional side view of a peripheral portion of the governor device according to the first embodiment of the present invention.

FIG. 3 is a schematic diagram of a governor device according to a second embodiment of the present invention.

FIG. 4 is a vertical sectional side view of a peripheral portion of a governor device according to a second embodiment of the present invention.

FIG. 5 is a schematic view of a governor device according to a conventional technique.

[Explanation of symbols]

1 ... Fuel injection pump, 2 ... Metering rack pin, 3 ... Interlocking rod, 4 ... Governor lever, 5 ... Slide guide pin, 6 ...
Sliding slot, 7 ... Governor spring, 8 ... Energizing spring, 9 ... 6 fuel increase side end, 10 ... Metering rack, 11 ... Engine stop operating means (34 ... Linear solenoid), 12 ... Stop operation Force, 13 ... Predetermined fuel injection position, 14 ... Engine stop position, 15 ... Slide guide long hole portion, 16 ... Slide pin, 17 ... Fuel increase side end portion, 37 ... Slide, 38 ... Slide, 45 ... Pin fitting portion, 47 ... Fixed portion (48 ... Governor chamber wall).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuhiro Yamamoto 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Factory (72) Inventor Shoichi Yamamoto 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Factory (72) Inventor Akira Hayaya 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Co., Ltd. (72) Inventor Yutaka Watanabe 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Co., Ltd.

Claims (2)

[Claims] 1. A metering rack pin for a fuel injection pump (1)
In a governor device for a diesel engine in which (2) is interlockingly connected to a governor lever (4) via an interlocking rod (3), a slide guide pin is provided at an output end of the governor lever (4).
(5) is fixed, and an elongated slot (6) for sliding along the fuel increasing / decreasing direction is formed at the input end of the interlocking rod (3). The elongated slot (6) for sliding is formed on the slide guide pin. (5) is slidably fitted to the outside, and the pin fitting part (45) formed at the output end of the interlocking rod (3) is fitted to the quantity measuring rack pin (2) so that it cannot be slid. (10) -A biasing force having a weaker spring force than the governor spring (7) of the governor lever (4) between any of the adjusting rack pin (2) and the interlocking rod (3) and the fixed portion (47). The spring (8) is installed and this biasing spring
The fuel reducing side end (9) of the slide long hole (6) is pressed against the slide guide pin (5) by the tension of (8), and the above-mentioned metering rack (10) and the above-mentioned metering rack pin (2) ) -A stop operation force (12) in the fuel reduction direction is applied from the engine stop operation means (11) to any one of the interlocking rods (3), and the metering rack pin (2) is moved to a predetermined fuel injection position. (1
When interlocking from 3) to the engine stop position (14), the slide long hole (6) is slid (37) in the fuel reduction direction by the guide of the slide guide pin (5). Characteristic diesel engine governor device. 2. A metering rack pin for a fuel injection pump (1)
In a governor device for a diesel engine in which (2) is interlockingly connected to a governor lever (4) via an interlocking rod (3), a slide guide elongated hole (in the fuel increasing / decreasing direction) is provided at an output end of the governor lever (4). 15) forming the interlocking rod
A slide pin (16) is fixedly installed at the input end of (3), and the slide pin (16) is slidably fitted in the slide guide long hole portion (15) so that the interlocking rod (3) The pin fitting part (45) formed at the output end is connected to the above-mentioned metering rack pin (2).
The governor spring of the governor lever (4) is fitted between the fixing portion (17) and any one of the measuring rack (10), the measuring rack pin (2), and the interlocking rod (3) so as not to slide. An urging spring (8), which has a weaker spring force than (7), is provided.
With the tension of (8), the slide pin (16) is brought into pressure contact with the end portion (17) of the slide guide elongated hole (15) on the fuel increasing side, and the metering rack (10) and the metering rack pin (2). .Engine stop operation means for any of the interlocking rods (3) above
A stop operation force (12) in the fuel reduction direction is applied from (11), and the metering rack pin (2) is moved to a predetermined fuel injection position (1
3) from the engine stop position (14) to the slide pin (16) slide guide slot (15)
The governor device for a diesel engine, characterized in that it is configured to slide (38) toward the fuel reduction side by the guide.