JP2010071089A - Fuel metering device for diesel engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel metering device for a diesel engine inhibiting faulty operation of a mechanical governor. <P>SOLUTION: A manual stop operation input part 14 is projected out from a guided part 7 of a slider 6 in a right-facing manner. A manual stop operation output part 15 faces the manual stop operation input part 14 from a rear side. In manual engine stop operation, manual stop operation force is transmitted to the manual stop operation input part 14 from the manual stop operation output part 15, a rack pin 2e is pushed forward by a slider forward output part (9), the slider 6 slides forward and a fuel metering rack 2a moves to a fuel no injection position against energizing force 13a of an energizing spring 13 with a governor lever 4 left at a position. In this construction, a front hook lock part 16 is formed at the manual stop operation input part 14, and an erection direction of the energizing spring 13 gets close to a direction in parallel to the fuel metering rack 2a in a view from an upper side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fuel metering device for a diesel engine, and more particularly to a fuel metering device for a diesel engine that can suppress a malfunction of a mechanical governor.

  As a conventional fuel metering device for a diesel engine, a fuel injection pump and a mechanical governor are housed in a pump housing case, and a fuel metering rack is provided on one side of the fuel injection pump, as in the present invention. A governor lever of a mechanical governor is arranged on the right side of the rack, a guide portion is provided at the upper end portion of the governor lever, and a guided portion of the slider is attached to the guide portion so as to be slidable back and forth. A linear actuator is attached to the mounting hole, and the front end of the output rod of this linear actuator faces the rear end of the fuel metering rack from the rear side, and the rear hook is attached to the rear wall of the pump housing case on the right side of the output rod of the linear actuator. A locking part is provided, a front hook locking part is provided on the slider, and a biasing sp Front and rear hook is locked in the ring, there is one biasing spring is laid (e.g., see Patent Document 1).

  However, in the conventional fuel metering device for a diesel engine, a front hook engaging portion is formed at the rear end portion of the guided portion of the slider, and the front hook of the urging spring is engaged with the front hook engaging portion. Because there is a problem.

JP 2002-129986 A (see FIG. 1)

The above prior art has the following problems.
<Problem> The mechanical governor may malfunction.
A prototype example using a conventional fuel metering device is shown in FIG. In this prototype, a front hook locking portion (116) is formed at the rear end portion (107a) of the guided portion (107) of the slider (106) as in the prior art, and the front hook locking portion (116) is formed. Since the front hook (113b) of the urging spring (113) is locked, the erection direction of the urging spring (113) is greatly inclined with respect to the fuel metering rack (102a) when viewed from the upper side. The lateral component of the urging force (113a) of the urging spring (113) is increased. For this reason, the governor lever (104) tilts to the side, the frictional resistance of the pivotal support (not shown) of the governor lever (104) increases, and the mechanical governor (103) may malfunction. In this case, the metering accuracy of the mechanical governor (103) is lowered. Also, the pivot of the governor lever (104) may wear out.

  An object of the present invention is to provide a fuel metering device for a diesel engine that can solve the above-described problems, that is, a fuel metering device for a diesel engine that can suppress a malfunction of a mechanical governor.

Invention specific matters of the invention according to claim 1 are as follows.
As illustrated in FIG. 1, a fuel injection pump (2) and a mechanical governor (3) are accommodated in a pump accommodation case (1), and a fuel metering rack (2a) is placed on one side of the fuel injection pump (2). Is provided,
As illustrated in FIGS. 1 and 2, a fuel injection pump (2) in which the metering movement direction of the fuel metering rack (2 a) is the front-rear direction, the fuel decrease side is the front, the fuel increase side is the rear, and is orthogonal to the front-rear direction. The side of the fuel metering rack (2a) is placed on the right, the opposite side is on the left, and the center axis (2c) of the plunger chamber (2b) of the fuel injection pump (2) is placed up and down. The direction, the fuel injection cam (2d) side is defined as down, and the opposite side is defined as up.

  As illustrated in FIGS. 1 and 2, the governor lever (4) of the mechanical governor (3) is disposed on the right side of the fuel metering rack (2a), and the governor lever (4) is swingable at the pivot (4a). The guide portion (5) is provided at the upper end of the governor lever (4), and the guided portion (7) of the slider (6) is slidably attached to the guide portion (5). A lever forward output portion (8) is provided at the front of the guide portion (5), and a slider forward output portion (9) is provided at the slider (6) on the right side of the lever forward output portion (8). A slider rearward input / output unit (10) is provided on the slider (6) in front of the output unit (8), and a rack pin (2e) protrudes to the right from the fuel metering rack (2a). The lever forward output part (8) and slider forward output part (9) face from the side, and the rack pin (2 ) To face the slider backward output unit (10) from its front.

  As illustrated in FIGS. 1 and 2, a linear actuator (11) is attached to the actuator mounting hole (1b) of the rear wall (1a) of the pump housing case (1), and an output rod (11) of the linear actuator (11) 11a) has a front end portion (11b) that faces the rear end portion (2f) of the fuel metering rack (2a) from the rear side, and is located on the right side of the output rod (11a) of the linear actuator (11). A rear hook engaging portion (12) is provided on the rear wall (1a), a front hook engaging portion (16) is provided on the slider (6), and an urging spring is provided on the front and rear hook engaging portions (16) (12). The front and rear hooks (13b) and (13f) of (13) are locked, and an urging spring (13) is installed. The urging force (13a) of the urging spring (13) causes the slider (6) to be applied rearward. Be forced.

As exemplified in FIG. 1, during the metering operation by the mechanical governor (3), the governor lever (4) swings forward by the lever forward output section (8) and the swing backward by the slider (6). Is transmitted to the rack pin (2e) of the fuel metering rack (2a) by the slider rearward input / output unit (10), and the fuel metering rack (2a) follows the swing of the governor lever (4) back and forth. The fuel injection amount of the fuel injection pump (2) is metered by the mechanical governor (3),
When the engine is stopped by the linear actuator (11), the forward protrusion of the output rod (11a) of the linear actuator (11) extends from the front end (11b) of the output rod (11a) to the rear of the fuel metering rack (2a). It is transmitted to the end portion (2f), and the rack pin (2e) pushes the slider rearward input / output portion (10) forward, leaving the governor lever (4) left behind, and the biasing force (13a) of the biasing spring (13). In the fuel metering device for a diesel engine, which is configured such that the fuel metering rack (2a) moves to the fuel-free injection position while the slider (6) slides forward against the It is configured.

As illustrated in FIG. 1, a manual stop operation input portion (14) protrudes rightward from the guided portion (7) of the slider (6), and a manual stop operation is performed on the manual stop operation input portion (14) from the rear side. The output unit (15)
At the time of manual engine stop operation, the manual stop operation force is transmitted from the manual stop operation output section (15) to the manual stop operation input section (14), and the rack pin (2e) is pushed forward by the slider forward output section (9). The fuel metering rack (2a) is fueled while the slider (6) slides forward against the biasing force (13a) of the biasing spring (13) with the governor lever (4) left behind. In configuring to move to the non-injection position,
A front hook engaging portion (16) is formed in the manual stop operation input portion (14), and the front hook (13b) of the urging spring (13) is engaged with the front hook engaging portion (16). As compared with the case where the front hook (13b) of the urging spring (13) is locked to the rear end (7a) of the guided portion (7) of the slider (6), the urging spring (13) is installed. A fuel metering device for a diesel engine, characterized in that the direction is close to a direction parallel to the fuel metering rack (2a) when viewed from above.

(Invention according to Claim 1)
<Effect> The malfunction of the governor lever can be suppressed.
As illustrated in FIG. 1, a front hook engaging portion (16) is formed in the manual stop operation input portion (14), and the front hook (13b) of the urging spring (13) is formed on the front hook engaging portion (16). ) Is locked, compared with the case where the front hook (13b) of the biasing spring (13) is locked to the rear end (7a) of the guided portion (7) of the slider (6). Since the construction direction of the biasing spring (13) is configured to approach the direction parallel to the fuel metering rack (2a) when viewed from above, the biasing force (13a) of the biasing spring (13) is reduced. The lateral component force is reduced, the inclination of the governor lever (4) in the lateral direction is suppressed, and the frictional resistance of the pivot (4a) of the governor lever (4) is reduced. Thereby, the metering precision of a mechanical governor (3) can be improved. Further, it is possible to suppress wear of the pivot portion (4a) of the governor lever (4).

(Invention according to Claim 2)
In addition to the effect of the invention according to claim 1, the following effect is achieved.
<Effect> It is possible to increase the degree of freedom of arrangement of the components around the slider.
As illustrated in FIG. 5 (B), the front bent piece (6c) is bent rightward with the upper or lower part of the notch (6e) entering leftward from the right edge of the right bent piece (6b) as the bent boundary part (6f). Since the front hook engaging portion (16) is formed by bending forward from the piece (6b) and the bending boundary portion (6f), the right side of the bending boundary portion (6f) is compared with the case where there is no notch (6e). Can be shortened, and the folding boundary portion (6f) and the components in the vicinity of the moving region (such as the fuel limiting bolt (19)) are less likely to interfere with each other, and the components around the slider (6) The degree of freedom of arrangement can be increased.

(Invention according to claim 3)
In addition to the effect of the invention according to claim 1 or claim 2, the following effect is achieved.
<Effect> The front hook of the urging spring can be easily locked to the slider.
The urging spring (13) is inserted into the pump housing case (1) from the actuator mounting hole (1b), and as shown in FIG. 5 (C), the right bent piece (6b) is cut into the notch (6e) from the right side to the front. The base portion (13d) of the hook (13b) is inserted, the front hook (13b) is rotated in the space (6g) with the base portion (13d) as a rotation center axis, and the front hook (13e) is turned upward to Since the front hook (13b) can be locked to the bent boundary portion (6f) constituting the front hook locking portion (16) by pulling 13b) backward, the biasing spring (13) The front hook (13b) can be easily locked to the slider (6).

(Invention of Claim 4)
In addition to the effects of the invention according to any one of claims 1 to 3, the following effects are provided.
<Effect> The slider and the high idle spring receiver can be integrally bent.
As illustrated in FIG. 5A, a lower front bent piece (6i) is bent forward from the lower edge of the left bent piece (6d), and a high idle spring is formed from the front edge of the lower front bent piece (6i). The upper bent piece (6k) constituting the receiver (17) is bent upward and formed so that the high idle spring (18) is received by the high idle spring receiver (17) as illustrated in FIG. Therefore, the slider (6) and the high idle spring receiver (17) can be integrally bent.

(Invention according to claim 5)
In addition to the effects of the invention according to any one of claims 1 to 4, the following effects are provided.
<Effect> The malfunction of the electronic governor can be suppressed.
As illustrated in FIG. 1, the slider (6) receiving the urging force (13a) of the urging spring (13) slides back and forth along the guide portion (5) of the governor lever (4), thereby adjusting the fuel. When the quantity rack (2a) slides back and forth following the front and rear movement of the front end (11b) of the output rod (11a), the input from the mechanical governor (3) to the fuel metering rack (2a) is cut off. In this state, the fuel injection amount of the fuel injection pump (2) is metered by the electronic governor. However, the installation direction of the biasing spring (13) is parallel to the fuel metering rack (2a) when viewed from above. Therefore, the lateral component of the urging force (13a) of the urging spring (13) is reduced, the sliding resistance of the slider (6) is reduced, and the electronic governor is operated. Defects can be suppressed.
In the conventional case where the front hook (13b) of the urging spring (13) is locked to the rear end (7a) of the guided portion (7) of the slider (6), the slider (6) on the high load side. However, the electronic governor sometimes malfunctions, but according to the present invention, such a problem is solved.

  Embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 9 are diagrams for explaining a diesel engine metering device according to an embodiment of the present invention. In this embodiment, a diesel engine fuel metering device including a mechanical governor and an electronic governor will be described.

The outline of the embodiment of the present invention is as follows.
As shown in FIG. 7, a pump housing case (1) is provided at the rear of the gear case (23). A timing transmission gear train (24) is accommodated in the gear case (23). The timing transmission gear train (24) includes a crank gear (25), an idle gear (26), a valve cam gear (27), and a fuel injection cam gear (28).

The structure inside the pump case housing case is as follows.
As shown in FIG. 1, a fuel injection pump (2) and a mechanical governor (3) are accommodated in a pump housing case (1), and a fuel metering rack (2a) is disposed on one side of the fuel injection pump (2). Is provided.

The definition of the direction in this invention is as follows.
As shown in FIG. 1 and FIG. 2, the fuel metering rack (2a) has a fuel metering rack (2a) in which the metering movement direction is the front-rear direction, the fuel decrease side is the front, the fuel increase side is the rear, and The width direction is the horizontal direction, the side where the fuel metering rack (2a) is arranged is on the right, the opposite side is on the left, and the direction of the central axis (2c) of the plunger chamber (2b) of the fuel injection pump (2) is the vertical direction The fuel injection cam (2d) side is defined as the lower side and the opposite side as the upper side.

As shown in FIGS. 1 and 2, the governor lever (4) of the mechanical governor (3) is arranged on the right side of the fuel metering rack (2a), and the governor lever (4) is swingable by the pivot (4a). A guide portion (5) is provided at the upper end portion of the governor lever (4), and a guided portion (7) of the slider (6) is attached to the guide portion (5) so as to be slidable back and forth. .
As shown in FIG. 2, the governor lever (2a) is urged by the governing lever (25) through the governor spring (26) in the direction of fuel increase, and is generated by the governor spring force (26a) and the flyweight (27). It swings in the fuel increasing / decreasing direction due to the unbalanced force with the governor force (27a).

  As shown in FIG. 1, a lever forward output portion (8) is provided at the front portion of the guide portion (5), and a slider forward output portion (9) is placed on the slider (6) on the right side of the lever forward output portion (8). A slider rearward input / output part (10) is provided in the slider (6) in front of the lever forward output part (8), and the rack pin (2e) protrudes from the fuel metering rack (2a) to the right, The rack pin (2e) has a lever forward output part (8) and a slider forward output part (9) from the rear, and the rack pin (2e) has a slider rearward input / output part (10) from the front.

As shown in FIGS. 1 and 2, a linear actuator (11) is attached to an actuator mounting hole (1b) of a rear wall (1a) of a pump housing case (1), and an output rod (11a) of the linear actuator (11) is attached. ) Faces the rear end (2f) of the fuel metering rack (2a) from the rear side, and the rear side of the pump housing chamber (1) on the right side of the output rod (11a) of the linear actuator (11). The wall (1a) is provided with a rear hook engaging portion (12), the slider (6) is provided with a front hook engaging portion (16), and the front and rear hook engaging portions (16) and (12) are biased with springs ( 13) The front and rear hooks (13b) and (13f) of 13) are locked, and an urging spring (13) is installed. The urging force (13a) of the urging spring (13) urges the slider (6) backward. Has been.
The biasing spring (13) also functions as a starting spring that holds the fuel metering rack (2a) at the starting increasing position when the engine is started.

  As shown in FIG. 1, during the metering operation by the mechanical governor (3), the forward swing of the governor lever (4) is the lever forward output portion (8), and the backward swing is the slider backward of the slider (6). The fuel input / output unit (10) is transmitted to the rack pin (2e) of the fuel metering rack (2a), and the fuel metering rack (2a) slides back and forth following the swing of the governor lever (4) back and forth. Thus, the fuel injection amount of the fuel injection pump (2) is metered by the mechanical governor (3).

  As shown in FIG. 6, a stopper (20) protrudes forward from the guide portion (5) of the governor lever (4), and the slider rearward input / output portion (10) of the slider (6) is received by this stopper (20). The clearance dimension (21) between the lever forward output part (8) and the slider rearward input / output part (10) is set to be larger than the diameter (22) of the rack pin (2e), and the rack pin (2e) faces the lever forward. It is prevented from being sandwiched between the output section (8) and the slider rearward-facing input / output section (10), and the malfunction of the mechanical governor (3) due to these frictional resistances is suppressed.

As shown in FIG. 1, when the engine is stopped by the linear actuator (11), the forward protrusion of the output rod (11a) of the linear actuator (11) is caused by the fuel adjustment from the front end (11b) of the output rod (11a). Is transmitted to the rear end portion (2f) of the amount rack (2a), and the rack pin (2e) pushes the slider rearward input / output portion (10) forward, leaving the governor lever (4) left behind, The fuel metering rack (2a) moves to the fuel non-injection position while the slider (6) slides forward against the urging force (13a) of 13).
When the governor lever (4) is left behind, the load of the governor lever (4) and the governor force (26a) of the governor spring (26) do not become the resistance of the linear actuator (11), and the linear actuator (11) is reduced in output. There are advantages that can be made.

As shown in FIG. 1, a manual stop operation input portion (14) protrudes rightward from the guided portion (7) of the slider (6), and a manual stop operation output is output to the manual stop operation input portion (14) from the rear side. Part (15) is facing.
As shown in FIG. 1, during a manual engine stop operation, a manual stop operation force is transmitted from the manual stop operation output section (15) to the manual stop operation input section (14), and the rack forward pin (9) outputs the rack pin. (2e) is pushed forward and the governor lever (4) is left behind, and the slider (6) slides forward against the urging force (13a) of the urging spring (13) while adjusting the fuel. In configuring the quantity rack (2a) to move to the non-fuel injection position, it is configured as follows.

  As shown in FIG. 1, a front hook engaging portion (16) is formed in the manual stop operation input portion (14), and the front hook (13b) of the biasing spring (13) is formed on the front hook engaging portion (16). The front hook (13b) of the urging spring (13) is locked to the rear end (7a) of the guided portion (7) of the slider (6). The construction direction of the force spring (13) is configured to approach a direction parallel to the fuel metering rack (2a) when viewed from above.

The configuration of the slider is as follows.
As shown in FIG. 5 (B), the slider (6) is a bent product of sheet metal, and the slider forward output portion from the front edge of the guided piece (6a) constituting the guided portion (7) of the slider (6). (9) and the right bent piece (6b) constituting the manual stop operation input unit (14) are bent to the right and the front bent piece (6c) is bent forward from the right edge of the right bent piece (6b). The left bent piece (6d) constituting the slider rearward input / output unit (10) is bent leftward from the front edge of the front bent piece (6c).

As shown in FIG. 5C, the front bent piece (6c) is the right bent piece (6b) with the upper part of the notch (6e) entering leftward from the right edge of the right bent piece (6b) as the bent boundary part (6f). The front hook engaging portion (16) is formed at the folding boundary portion (6f). The folding boundary portion (6f) serving as the front hook locking portion (16) is located at the upper right of the right bent piece (6b).
Instead of the above structure, the lower part of the notch (6e) may be an upper bent boundary part (6f). In this case, the bent boundary portion (6f) serving as the front hook engaging portion (16) is located at the lower right of the right bent piece (6b). In this case, the manual stop operation input part (15) is arranged at a position where it does not interfere with the biasing spring (13).

As shown in FIG. 5 (B), the space (6g) in which the folding dimension (13c) of the front hook (13b) of the biasing spring (13) is between the right bent piece (6b) and the left bent piece (6d). ) In the front-rear dimension (6h).
As a result, the urging spring (13) is inserted into the pump housing case (1) from the actuator mounting hole (1b), and the right bent piece (6b) is cut into the notch (6e) as shown in FIG. The base portion (13d) of the front hook (13b) is inserted from the right side, and the front hook (13b) is rotated in the space (6g) with the base portion (13d) as a rotation center axis. As shown in FIG. 5 (A), the front hook (13b) is pulled upward, and the front hook (13b) is pulled backward, as shown in FIG. 5 (A). It is comprised so that it can latch on the bending boundary part (6f) which comprises.

  As shown in FIG. 5A, a lower front bent piece (6i) is bent forward from the lower edge of the left bent piece (6d), and a high idle spring receiver is received from the front edge of the lower front bent piece (6i). The upper bent piece (6k) constituting (17) is bent upward, and the high idle spring (18) is received by the high idle spring receiver (17) as shown in FIG. The high idle spring (18) is attached to the rear end of the high idle adjustment bolt (31) attached to the gear case (23).

As shown in FIG. 1, the linear actuator (11) is an electronic governor actuator, and during the metering operation by the electronic governor, the forward protrusion of the output rod (11a) of the linear actuator (11) is the output rod (11a). ) Is transmitted from the front end portion (11b) to the rear end portion (2f) of the fuel metering rack (2a), the rack pin (2e) is moved forward from the lever forward output portion (8), and the slider is moved by the rack pin (2e). The backward-facing input / output unit (10) is pushed forward.
While the slider (6) receiving the biasing force (13a) of the biasing spring (13) slides back and forth along the guide portion (5) of the governor lever (4), the fuel metering rack (2a) In the state where the input from the mechanical governor (3) to the fuel metering rack (2a) is cut off by sliding back and forth following the back-and-forth movement of the front end portion (11b) of (11a), the fuel injection pump ( The fuel injection amount of 2) is configured to be metered by an electronic governor.

  FIG. 8 is a graph showing the metering characteristics of the mechanical governor and the electronic governor. The solid line is the full load line (29) of the mechanical governor (3), and the chain line is the electronic control line (30) of the electronic governor. Both the mechanical governor (3) and the electronic governor move the rack position to the fuel increase side as the load increases. The mechanical governor (3) has a droop characteristic in which the engine speed decreases as the load increases. The governor has an isochronous characteristic in which the engine speed is constant regardless of an increase in load. When the load is a partial load, the metering operation is performed by the electronic governor, and as described above, the input from the mechanical governor (3) to the fuel metering rack (2a) is cut, but if the load exceeds the full load, When the output rod (11a) of the linear actuator (11) is largely retracted rearward, the front end (11b) of the output rod (11a) is separated from the rear end (2f) of the fuel metering rack (2a), and the electronic governor The metering rack pin (2e) is disconnected from the input to the fuel metering rack (2a), and the increase in the fuel injection amount is limited by the mechanical governor (3).

  When the electronic governor is malfunctioning, the emergency operation can be performed by the control of the mechanical governor (3) by forcibly retreating the output rod (11a) of the linear actuator (11) rearwardly.

It is a cross-sectional top view of the fuel metering apparatus of the diesel engine which concerns on embodiment of this invention. It is the vertical side view which looked at the apparatus of FIG. 1 from the right side. FIG. 2 is a longitudinal rear view of the apparatus of FIG. 1 viewed from the rear side. It is the vertical front view which looked at the apparatus of FIG. 1 from the front side. FIG. 5A is a side view seen from the right side, FIG. 5B is a plan view, FIG. 5C is a rear view seen from the rear side, and FIG. 5 (D) is a front view seen from the front side. It is the side view which looked at the guide part of the lever used with the apparatus of FIG. 1, a slider, and the high idle spring from the left side. It is the vertical front view which looked at the gear case incorporating the apparatus of FIG. 1 from the front side. It is a graph explaining the governor characteristic of the apparatus of FIG. FIG. 2 is a diagram corresponding to FIG.

Explanation of symbols

(1) Pump housing case
(1a) Rear wall
(1b) Actuator mounting hole
(2) Fuel injection pump
(2a) Fuel metering rack
(2b) Plunger chamber
(2c) Center axis
(2d) Fuel injection cam
(2e) Rack pin
(2f) Rear end
(3) Mechanical governor
(4) Governor lever
(4a) The pivot
(5) Guide part
(6) Slider
(6a) Guided piece
(6b) Right bent piece
(6c) Front bent piece
(6d) Left bent piece
(6e) Notch
(6f) Bending boundary
(6g) Space
(6h) Front and rear dimensions
(6i) Lower front folded piece
(6k) Upper folded piece
(7) Guided part
(7a) Rear end
(8) Lever forward output part
(9) Slider forward output section
(10) Slider backward input / output section
(11) Linear actuator
(11a) Output 杆
(11b) Front end
(12) Rear hook locking part
(13) Biasing spring
(13a) Energizing force
(13b) Front hook
(13c) Folding dimension
(13d) Base
(13e) Folded end
(13f) Rear hook
(14) Manual stop operation input section
(15) Manual stop operation output section
(16) Front hook locking part
(17) High idle spring receiver
(18) High idle spring
(19) Fuel limit bolt

Claims (5)

A fuel storage pump (2) and a mechanical governor (3) are stored in a pump storage case (1), and a fuel metering rack (2a) is provided on one side of the fuel injection pump (2).
The metering movement direction of the fuel metering rack (2a) is the front-rear direction, the fuel-decreasing side is the front, the fuel-increasing side is the rear, the width direction of the fuel injection pump (2) perpendicular to the front-rear direction is the lateral direction, (2a) is located on the right side, the opposite side is on the left, the central axis (2c) direction of the plunger chamber (2b) of the fuel injection pump (2) is up and down, and the fuel injection cam (2d) side is down , Define the opposite side as above,
The governor lever (4) of the mechanical governor (3) is disposed on the right side of the fuel metering rack (2a), and the governor lever (4) is pivotally supported by the pivot portion (4a). The governor lever (4) A guide portion (5) is provided at the upper end portion, and a guided portion (7) of the slider (6) is slidably attached to the guide portion (5). An output portion (8) is provided, and a slider forward output portion (9) is provided on the slider (6) on the right side of the lever forward output portion (8), and a slider (6 ) Is provided with a slider rearward-facing input / output unit (10), and a rack pin (2e) protrudes to the right side from the fuel metering rack (2a). A lever forward output unit (8) and a slider from the rear of the rack pin (2e) The forward-facing output section (9) faces and the rack pin (2e) faces the slider from the front The output unit (10) faces,
A linear actuator (11) is mounted in the actuator mounting hole (1b) of the rear wall (1a) of the pump housing case (1), and the front end (11b) of the output rod (11a) of the linear actuator (11) is fuel-adjusted. A rear hook engaging part on the rear wall (1a) of the pump housing chamber (1) on the right side of the output rod (11a) of the linear actuator (11), facing the rear end part (2f) of the quantity rack (2a) from the rear side (12) is provided, the front hook engaging portion (16) is provided on the slider (6), and the front and rear hooks (13b) (13f) of the urging spring (13) are provided on the front and rear hook engaging portions (16) (12). ) Is locked, and an urging spring (13) is installed, and the urging force (13a) of the urging spring (13) urges the slider (6) backward,
During metering operation by the mechanical governor (3), the governor lever (4) swings forward with the lever forward output section (8), and the rear swing swings with the slider rearward input / output section (10 ) Is transmitted to the rack pin (2e) of the fuel metering rack (2a), and the fuel metering rack (2a) slides back and forth following the swing of the governor lever (4) back and forth, The fuel injection amount of the pump (2) is metered by the mechanical governor (3),
When the engine is stopped by the linear actuator (11), the forward protrusion of the output rod (11a) of the linear actuator (11) extends from the front end (11b) of the output rod (11a) to the rear of the fuel metering rack (2a). It is transmitted to the end portion (2f), and the rack pin (2e) pushes the slider rearward input / output portion (10) forward, leaving the governor lever (4) left behind, and the biasing force (13a) of the biasing spring (13). In the fuel metering device for a diesel engine, the slider (6) is slid forward and the fuel metering rack (2a) is moved to the non-fuel injection position.
A manual stop operation input portion (14) protrudes rightward from the guided portion (7) of the slider (6), and a manual stop operation output portion (15) faces the manual stop operation input portion (14) from the rear side.
At the time of manual engine stop operation, the manual stop operation force is transmitted from the manual stop operation output section (15) to the manual stop operation input section (14), and the rack pin (2e) is pushed forward by the slider forward output section (9). The fuel metering rack (2a) is fueled while the slider (6) slides forward against the biasing force (13a) of the biasing spring (13) with the governor lever (4) left behind. In configuring to move to the non-injection position,
A front hook engaging portion (16) is formed in the manual stop operation input portion (14), and the front hook (13b) of the urging spring (13) is engaged with the front hook engaging portion (16). Compared with the case where the front hook (13b) of the biasing spring (13) is locked to the rear end (7a) of the guided portion (7) of the slider (6), the urging spring (13) is installed. A fuel metering device for a diesel engine, characterized in that the direction is close to a direction parallel to the fuel metering rack (2a) when viewed from above. The fuel metering device for a diesel engine according to claim 1,
The slider (6) is a bent product of sheet metal. From the front edge of the guided piece (6a) constituting the guided portion (7) of the slider (6), the slider forward output portion (9) and the manual stop operation input portion ( 14) is formed by bending the right folded piece (6b) to the right, and the front folded piece (6c) is folded forward from the right edge of the right folded piece (6b), and the front folded piece (6c) The left bent piece (6d) constituting the slider rearward input / output unit (10) from the front edge is bent leftward,
The front bent piece (6c) is bent forward from the right bent piece (6b) with the upper or lower part of the notch (6e) entering the left side from the right edge of the right bent piece (6b) as the bent boundary part (6f). A fuel metering device for a diesel engine, characterized in that a front hook engaging portion (16) is constituted by a boundary portion (6f). The fuel metering device for a diesel engine according to claim 2,
The folding dimension (13c) of the front hook (13b) of the biasing spring (13) is shorter than the longitudinal dimension (6h) of the space (6g) between the right folded piece (6b) and the left folded piece (6d). Formed,
The urging spring (13) is inserted into the pump housing case (1) from the actuator mounting hole (1b), and the base (13d) of the front hook (13b) is inserted into the notch (6e) of the right bent piece (6b) from the right side. The front hook (13b) is rotated in the space (6g) with the base (13d) as the rotation center axis, and the front hook (13b) is pulled rearward with the folded end (13e) facing upward. A fuel metering device for a diesel engine, characterized in that the hook (13b) can be locked to a bent boundary portion (6f) constituting the front hook locking portion (16). In the fuel metering device for a diesel engine according to claim 2 or claim 3,
A lower front bent piece (6i) is bent forward from the lower edge of the left bent piece (6d), and an upper bent piece (17) is formed from the front edge of the lower front bent piece (6i). A fuel metering device for a diesel engine, wherein 6k) is bent upward and is configured so that the high idle spring receiver (17) receives the high idle spring (18). In the fuel metering device of the diesel engine according to any one of claims 1 to 4,
The linear actuator (11) is an electronic governor actuator. During metering operation by the electronic governor, the forward protrusion of the output rod (11a) of the linear actuator (11) is the front end portion (11b) of the output rod (11a). Is transmitted to the rear end portion (2f) of the fuel metering rack (2a), the rack pin (2e) is moved forward from the lever forward output portion (8), and the rear input / output portion (10 ) Is pushed forward,
While the slider (6) receiving the biasing force (13a) of the biasing spring (13) slides back and forth along the guide portion (5) of the governor lever (4), the fuel metering rack (2a) In the state where the input from the mechanical governor (3) to the fuel metering rack (2a) is cut off by sliding back and forth following the back-and-forth movement of the front end portion (11b) of (11a), the fuel injection pump ( 2. A fuel metering device for a diesel engine, characterized in that the fuel injection amount of 2) is metered by an electronic governor.

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