JP2524131B2 - Governor device for internal combustion engine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a two-lever governor device for an internal combustion engine.

(Prior Art and Its Problems) A conventional two-lever governor device is, for example, Jikken Sho 56.
-37067, the governor first and second levers are rotatably supported on the same lever support shaft, and equipped with a starting increase spring that pulls the first lever toward the fuel increase side for fuel increase at start. Further, a stop mechanism is specially provided for rotating the first lever in the fuel reducing direction against the start-up increasing spring when the engine is stopped. Therefore, the number of parts increases,
It takes time to manage and there is a cost problem.

(Object of the Invention) An object of the present invention is to provide a starting increase amount easily without a starting increase spring, and for a work machine requiring acceleration or a work machine not requiring acceleration, The goal is to obtain matched total fuel efficiency and acceleration performance.

(Means for Achieving the Object) In order to achieve the above object, the present invention provides a first lever rotatably around a governor lever shaft, and connects one end of the first lever to a control rack and the other end. A second lever that contacts the governor sleeve and is urged toward the fuel increase side by a regulator spring so as to be rotatable around the second lever support shaft and extends toward the control rack side to increase the fuel from the fuel increase side. The limiting device is opposed to the second lever shaft, and the second lever shaft is arranged at the first lever portion spaced apart from the governor lever shaft on the control rack side. The mounting position of the second lever support shaft is set so that the second lever shaft contacts the fuel limiting device. The position is changeable so that the position in the direction parallel to the line connecting the contact and the governor lever axis can be changed.

(Embodiment) FIG. 3 is a vertical cross-sectional view of a diesel engine equipped with a two-lever governor device according to the present invention. In FIG. 3, 1 is a governor sleeve, for example, a shaft at the end of a crankshaft. It is fitted so as to be movable in the direction, and is moved in the axial direction by the rotating (expanding) operation of the centrifugal force of the governor weight 2.

The vertical governor lever shaft 6 is rotatably supported by the gear case 5, and the governor first lever 7 is fixed to the governor lever shaft 6. One end of the first lever 7 extends toward the fuel injection pump 8 side and is engaged with a rack pin 9a of the fuel increase / decrease control rack 9. The other end of the first lever 7 extends toward the governor sleeve 1 side to form a bifurcated force receiving portion 7a, which is in contact with the end surface of the governor sleeve 1.

In FIG. 1 showing a perspective view of a two lever type governor device, a bracket 8 is formed at a portion of the governor first lever 7 which is spaced from the governor lever shaft 6 toward the rack side.
The first lever 7 and the bracket 8 have a governor second lever 10
Is attached to the support shaft 11. The support shaft 11 has a governor second lever 10 attached thereto.
The boss portion 10a is rotatably fitted. Second lever 10
Is located above the first lever 7 with a space therebetween, and extends to the rack pin 9a side substantially in parallel with the first lever 7. The tip of the second lever 10 is the first lever side 7 (lower side)
The plate portion 10b is integrally provided at the lower end thereof. A bracket 17 is formed on the first lever 7 so as to face the plate portion 10b from the fuel increasing side, and a rod insertion hole 14 is formed in the bracket 17. An Angleich spring device 13 is fixed to the plate portion 10b.
The rod portion 13a of the Angleich spring device 13 passes through the insertion hole 14 of the bracket 17 and extends toward the fuel-increasing side, and the stopper portion 13b is formed at the tip portion. ing.

In FIG. 2 showing the top view, the rod portion 20a of the fuel limiting device 20 also faces the plate portion 10b from the fuel increasing side. The fuel limiting device 20 is screwed to the gear case lid 21 and fixed by a nut 22, and has a torque spring built therein to urge the rod portion 20a toward the fuel reducing side.

The second lever 10 is integrally formed with an arm 10c extending substantially perpendicular to the second lever 10 on the fuel reducing side. The arm 10c has a plurality of holes 25 at different distances from the center O2 of the support shaft 11, 2
5'is formed. One end of the regulator spring 27 engages with the hole 25, the regulator spring 27 extends diagonally toward the rack pin side across the upper side of the second lever 10 and engages with the regulator lever 30 as shown in FIG. ing. The regulator lever 30 is fixed to the regulator shaft 31. The regulator shaft 31 is rotatably supported by the gear case 5, protrudes upward, and an accelerator lever 32 is fixed to the upper end of the regulator shaft 31.

The structure in which the mounting position of the second lever support shaft 11 is changeable will be described. In FIG. 2, the first lever 7 and the bracket 8 thereof have two support shaft support holes 35 for supporting the support shaft. , 36 are formed, and the second lever support shaft 11 can be selectively inserted and fixed in any of the support holes 35, 36. In the embodiment shown in FIG. 2, the first support hole 35 is formed at a position far from the support shaft governor lever shaft 6, and the second support hole 36 is formed at a position close to the governor lever side.
To be more precise, the contact point Q0 of the first lever 7 with respect to the tip of the rod 20a of the fuel limiting device 20 and the governor lever axis
Draw a straight line H that connects O1, and draw the first and second straight lines H
If you draw a perpendicular line from the center of each of the support holes 35 and 36 and set their intersections to Q1 and Q2, the governor lever shaft center O1 to the first support hole
The distance d1 to the intersection Q1 corresponding to 35 is formed to be larger than the distance d2 to the intersection Q2 corresponding to the second support hole 36.

(Operation) When the engine is started, the governor force FG applied to the force receiving portion 7a in FIG. 1 is zero. Arrow regulator lever 30
By rotating in the A1 direction, the regulator spring
A tensile force FR is applied to 27, the second lever 10 rotates in the B1 direction around the support shaft 11, and the first lever 7 also rotates in the B1 direction via the Angleich spring device 13. By contacting the fuel limiting device 20, the second lever 10 is restricted from rotating in the fuel increasing direction. However, spindle 11
Is eccentric with respect to the lever shaft 6 on the rack pin 9a side, so that the pulling force FR of the regulator spring 27 causes a rotational moment MR around the lever shaft 6 in the support shaft 11 portion. The rotation moment MR causes the first lever 7 to move to the second
The lever 10 is rotated in the direction of arrow B1 to move the rack pin 9a shown in FIG. 2 to the maximum fuel increase position Op1 to increase the amount of fuel.

When the second lever support shaft 11 is supported in the first support hole 35 far from the governor lever shaft 6 as shown in FIG.
MR can be increased and good acceleration performance can be obtained. Therefore, in the case of an engine that requires acceleration performance, such as a cultivator engine, a traveling work machine-equipped engine, a marine main engine, or a carrier vehicle engine, it is convenient to use the first insertion hole 35.

On the other hand, in the case of an engine that does not particularly require acceleration performance, for example, an engine for a generator or a water pump, by using the second support hole 36, excessive fuel injection can be suppressed and fuel consumption can be saved.

When the governor force FG becomes larger than the rotation moment MR of the support shaft 11 during engine rotation, the first lever 7 returns to the original operating state.

When the engine is running, the governor force FG uses the Angreich spring device at half throttle or full throttle 13
When it becomes smaller than the spring force FA and the rotation speed decreases, an Angleich pin (not shown) comes out to push the bracket 17 of the first lever 7 to the fuel increasing side, and the fuel injection amount is increased accordingly.

When the engine is stopped, the second lever 10 is rotated in the arrow B2 direction by rotating the regulator lever 30 shown in FIG. 1 in the arrow A2 direction. Since the first lever 7 and the second lever 10 are rotatable independently of each other,
Due to the small governor force FG applied to the force receiving portion 7a, the first lever 7 easily rotates in the fuel reducing direction to cut the fuel,
The engine can be stopped.

FIG. 4 is a graph showing the relationship between the rack position and the number of rotations. The graph shown by the solid line is the spindle in the first support hole 35 of FIG.
11 is attached, and the phantom line graph shows the case where the support shaft 11 is attached to the second support hole 36 in FIG. In the solid line graph, X1 is the rotational moment of the spindle 11 in Fig. 1.
The section where MR is acting, X2 is the section where the Angleich spring device 13 of FIG. 1 is acting, and X3 is the section where only the torque spring of the fuel limiting device 20 of FIG. 1 is acting. That is, the output is limited by the fuel limiting device 20 at high speed, and the output increase is limited by the Angleich spring device 13 at medium speed.

When the support shaft 11 is changed to the second support hole 36 in FIG. 2, the distance d1 is shortened to d2, so that the section X1 is lowered from the rotation speed N1 to the X1 'portion corresponding to the rotation speed N2.

The hole for engaging the regulator spring 27 shown in FIG.
By selectively selecting 25 and 25 ′ and changing the distances L1 and L2 from the center O2 of the support shaft to the locking point of the regulator spring 27, the maximum increase at low speed can be set arbitrarily.
For example, by selecting the hole 25 ', the position of X1 in FIG. 4 can be changed to the higher speed side.

(Other embodiment) (1) It is also possible to provide three or more support holes for the second lever support shaft.

(2) Instead of providing a plurality of support holes for the second lever shaft,
One long hole parallel to the straight line H in FIG. 2 is formed, and the second lever support shaft 11 is inserted into the long hole so as to be movable in the lengthwise direction of the long hole and fixed at an appropriate fixing position. You can also do so. In this case, the fixed position of the support shaft 11 can be adjusted steplessly.

(Effects of the Invention) According to the present invention as described above: (1) Both ends of the control rack 9 and the governor sleeve 1
To the regulator lever 30 via a regulator spring 27 and a second lever 7 that abuts on the regulator lever 30 respectively.
In a two-lever governor consisting of two levers, the lever 10 and a governor lever shaft 6 supporting the first lever 7, the first lever portion spaced from the control rack side is parallel to the governor lever shaft 6. Second lever support shaft 11
The second lever 10 is rotatably supported via. In short, in the 2-lever type governor, the support shaft 11 of the second lever 10 is eccentric from the lever shaft 6 of the first lever 7 toward the fuel increase / decrease rack side. The rotation moment MR around the lever axis is generated in the support shaft 11 by rotating in the fuel increasing direction via the, and the fuel can be increased to the maximum extent by the rotation moment MR.

That is, it is possible to easily increase the amount of fuel without providing a special spring for increasing the amount of fuel at the time of starting, which reduces the number of parts, reduces the management labor, and reduces the cost of parts. Is also reduced.

(2) By pulling the accelerator lever 32, that is, the regulator lever 30, the engine can be started at any position from the low speed rotation position to the high speed rotation position of the accelerator lever 32.
Startability is improved.

(3) Since the fuel increase spring at the time of starting is not required, a special stop mechanism for stopping the engine by using the fuel increasing spring at the time of starting is also unnecessary, and the number of parts is further reduced, and the management labor and parts are reduced. The cost is further reduced.

(3) Since the mounting position of the second lever support shaft 11 is freely changeable, the rotational moment MR can be changed according to various engines, and the relationship between the acceleration performance and the total fuel consumption that match each engine can be obtained. It is possible and convenient.

For example, in an engine requiring acceleration performance, the mounting position of the second lever support shaft 11 is moved away from the governor lever shaft 6 to improve the acceleration performance, while in an engine where acceleration performance is not particularly required, the second lever support shaft 11 is required. By making the mounting position of (1) closer to the governor lever shaft 6, it is possible to suppress excessive injection and save fuel consumption.

[Brief description of drawings]

1 is a perspective view of a governor device to which the present invention is applied, FIG. 2 is a top view of FIG. 1, FIG. 3 is a vertical sectional partial view of an engine equipped with the governor device of FIG. 1, and FIG. It is a graph which shows the relationship between a rotation speed and a rack position. 1 …… Governor sleeve, 6 …… Governor lever shaft, 7 …… First lever, 9 ……
Control rack for fuel increase / decrease, 10 …… Second lever, 11
…… Second lever support shaft, 20 …… Fuel limiting device, 27 …… Regulator spring, 30 …… Regulator lever, 35,
36 …… Support hole for second lever support

Claims (1)

(57) [Claims] 1. A first lever is provided rotatably around a governor lever shaft, one end of the first lever is connected to a control rack and the other end is in contact with a governor sleeve, and a regulator spring is provided to increase fuel. A second lever to be urged is rotatably provided around the second lever support shaft and extends to the control rack side so that the fuel limiting device faces the fuel increase side, and the second lever support shaft serves as a governor lever shaft. From the control rack side to the control lever side, and the mounting position of the second lever support shaft is parallel to the line connecting the contact point of the second lever to the fuel limiting device and the governor lever shaft core. An governor device for an internal combustion engine, which is changeable so that its position can be changed.