JPS5943931A - Governor for internal-combustion engine - Google Patents

Abstract

PURPOSE:To set the speed variation rate constant by increasing the spring force of a governor spring and the moment arm length of the governor spring around the regulator shaft as setting the control lever to the high speed side. CONSTITUTION:The upper side face 11b of a control valve 11 secured to a regulator shaft 10 is jointed slidably to a movable pin 19 stopped with one end 14a of a governer spring. Said pin 19 is fitted in a guide groove 21 of a bracket 20 fixed to a cover 1. Upon rotation of the control lever 11 in the arrow direction A, said pin 19 will move from one end 21a to the other 21b of the guide groove 21 to increase the spring force of the governer spring 14 while to increase the moment arm length from L1 to L2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a thruster that is moved forward and backward in the '41+ direction by a governor weight that is attached to one end of the cam 4q1 of a fuel injection pump and tilted appropriately according to the rotational speed of the camshaft. a centrifugal weight device having: a centrifugal weight device having a regulator shaft rotated by a regulator handle; A first governor whose rotational position is appropriately set according to the moment around the regulator IN1 due to the displacement force of the thruster of the device, and a first governor whose rotational position is appropriately set by the thruster to adjust the displacement of the thruster to the fuel injection pump. a first governor lever that acts to transmit information to the cabana rack; and a control lever that rotates integrally with the regulator shaft 14'J and engages with one end of the cabana spring to change the spring force thereof. The present invention relates to a speed governor for an internal combustion engine having a link lever mechanism equipped with a link lever mechanism.

Conventionally, in this type of m1ti-device for an internal combustion engine, as shown in FIG.
-a is fixedly hooked to the tip of the control lever // fixed to the regulator shaft 10, and the control lever // is rotated from the position shown by the solid line to the position shown by the chain line (symbol '/') filil. By increasing the spring force of the governor spring /≠, the operating state of the internal combustion engine is set from a low speed side to a high speed side. In this way, if one end of the governor spring /l/-/l1-a is fixedly attached to the tip end of the control lever //a, the governor spring will be Since the arm length L of the moment with respect to the regulator shaft 10 of /ll- (the arm length at low speed setting is 1 and the arm length at high speed setting is L) hardly changes, the first governor lever // The magnitude of the moment around the regulator shaft 70 is almost determined only by the amount of change in the length of the governor spring /ll-, that is, the spring load. This means that the metering rack g
This means that in order to change the amount by a certain amount, it is sufficient to apply approximately the same force to the thruster 2.

However, the displacement force of thruster B is equal to the rotational speed! Since the displacement changes in proportion to the power of the speed, the displacement of the metering rack in response to speed fluctuations is larger when the speed is set higher than when the speed is set lower. That is, the speed fluctuation rate when the high speed setting is set and the speed fluctuation rate when the low speed setting is set are significantly different.

This thing has an engine! ; Problems occur when using 011g and Otsu OHA as a driving motor for a generator. That is, for example, if the spring force of the governor spring /≠ is set so that the speed fluctuation rate of the /goo, rpn setting setter is the best, then the spring force of the governor spring /≠ is set as it is, for example /goo.
! ; When used at -00rfitn, the speed fluctuation rate becomes large, and conversely, when the speed fluctuation rate is set to a predetermined value at /jθθrpm and used at 117I00rn+, hunting will occur.9. Become.

In view of the above-mentioned conventional problems, the present invention aims to improve the operating characteristics of the engine by making it possible to set the speed fluctuation rate of the engine to be almost the same both when the speed is set at high speed and when it is set at low speed. This device was developed for the purpose of providing a speed governor device for an internal combustion engine that has a basic configuration as shown in the title, and has a control lever and a governor spring.
l wo, 'fA As the control lever is set from the low speed side to the high speed side, the spring force of the governor spring and the arm length of the moment about the regulator axis of the governor spring are engaged so that they can be simultaneously increased at an appropriate rate. It is characterized by:

Hereinafter, each embodiment of the settling device for an internal combustion engine of the present invention will be described.
To explain based on an example, first, FIG. i'j:
d iJ+ device zI is shown. this? JFd floor equipment 2. is a stone garden cylindrical case body / and the case body /
The cam shaft ≠ one end 1. which protrudes into the governor chamber 3 through the bottom plate 1. A centrifugal weight device P attached to the la, and a fuel tube protruding into the governor chamber 3 through the centrifugal weight device P and the case body bottom plate/a.
1Y17 is constructed by accommodating a link lever Q which is interposed between one end fa of the metering rod of the injection pump .

Centrifugal weight device:! i'' PII has a cabana bar eight 7 that tilts in accordance with the rotational movement of the cam ψ111g, and a thruster B that advances or retreats in the axial direction in accordance with the movement angle of the governor weight 7, and this thruster The first governor lever of the link lever mechanism Q, whose displacement force will be described later
2 and the fuel injection pump X via the second governor lever/3
It acts as if it were transmitted to the metering rack.

The link lever mechanism Q can be freely rotated through the governor chamber 3 in a direction perpendicular to the camshaft ≠, and is attached to one end that penetrates the side wall /b of the case body / and protrudes to the outside. A first governor lever 7.2, a second governor lever 73, and a control lever are attached to a regulator shaft 10 which can be appropriately rotated by a regulator handle shown in the figure.

1st governor lever/,! is bent into an abbreviated shape, and its corner portion /a and one of the nJ moving ends /, 2b and intermediate positions / and 2C are pivotally supported on the regulator shaft /θ for relative rotation. Also, this governor lever 7.2 has one end/2h as a retaining part for the thruster A of the centrifugal XIJ weight WP, and the other end 7.2b as the first governor lever/2, and 2 always on the -blade side. One end of the governor spring /≠ acts as if it is biased with an appropriate spring force, and a spring hooking part for hanging the gage b, and further includes a corner part /, 2.
A is the contact portion of the fuel restriction bolt /7 attached to the chain body λ side. Further, a headed bolt-shaped guide bin/g is attached to one end 7.2b of the first governor lever 7.2 via an angle spring/O, and the guide bin/adjustment 1 part/ga is , is always in contact with the thruster B by the spring force of the underground bearing/B.

The second governor lever /3 transmits the displacement of the ice cube to the straight rack g of the direct fuel injection bomb X, and is formed in the shape of a straight lever.

The first governor lever /3 has an intermediate portion /36 relatively rotatably supported on the regulator shaft 10, and one end portion /36 of the first governor lever /3 through an intermediate link /j.
iL! lv! iI is connected to one end of the rack. Also, the other end /3 of this first cabana lever /3
The force of the first vane lever 72 is interposed between the end face /21 of the thruster engagement ftI~/2b and the writing bin /g(1)'j(1 part/ga).

Therefore, while the displacement of thruster O is relatively small, the second cabana lever/3 is rotated integrally with the displacement of thruster O ('F) and the kite bin/g; The thruster engagement of the other end of the second governor lever/3/3c/3d and the first governor lever 7.2 becomes larger >'N'+/O1i/ of c2 b,
When 2 e comes into contact with each other, both of them are rotated up and down as a unit according to the displacement of thruster O.

The control lever // is a lever member whose one end //a is fixed to the regulator shaft 10, and the upper surface //b of the lever part is connected to the 2F) /force'banalever/no. Spring Kawatomebe/! The other end of the governor spring/g with one end/g attached to the closing section -I71゛1
．． 411 is provided as a joint surface for connecting and engaging the 11■ moving bottle /9 with the 1/ga hooked thereto. This movable bottle/7 is slidably fitted into the guide pin 1 of the bottle receiving bracket 0 on the side of the movable bottle 61j, and the control lever/ / Follow the 10th stitch ij4 in the direction of all arrows A, guide line, 2/
It is moved from one end, 2/a, to the other end, 21b. In addition, the shape and dimensions of this guide i'[ij,, 2/ and regulation l, - tie 1b10 and first governor lever/,
, Stop part for sublink of 2/. The 411 pair position with 2d is determined as follows: I]<ij. In other words, regulate - turn the lever from the low speed side to the high speed side! 11: As the control lever//C is moved, it is gradually rotated in the direction of arrow A, but at this time, the movable pin/7 that engages with the sliding engagement surface //b of this control lever// As the control lever 7.2 rotates, the distance between the movable bin 7.2 and the spring hook 7.2 of the first governor lever 7.2 increases (i.e., the spring of the governor spring 7.2 increases). +pa length of the moment around the regulator 410 due to the spring force of the cabana spring/≠ of the first cabana lever 7.2? Moreover, when the engine speed changes slightly with the regulator lever set at the high speed position, the moment about the counterclockwise d1 changes due to the spring force of the governor spring /I/- of the first cabana lever -/! The amount of change in the counterclockwise moment of the seventh cabana lever when the engine rotational speed changes slightly in the same way with the regulator lever set to the low speed position is the amount of change in the counterclockwise moment of the seventh cabana lever when the thruster is set to the high speed position. It is appropriately set to change in accordance with the change in the displacement force of 1 W and the amount of change in the displacement force of thruster B when the speed is set at low speed.

As mentioned above, by setting the size and shape of the guide groove 2/ of the movable pin/rip relative to the regulator shaft 10 and the spring catch part/2d of the first governor lever/2, the engine speed will be reduced when the engine is set at high speed. Even if a fluctuation occurs, even if a speed fluctuation occurs at a low speed setting, only the finger corresponding to the amount of change in the displacement force of the thruster O due to each speed fluctuation will be moved by the first governor lever /, l! and second governor lever/
Since the fuel injection limit can be controlled by displacing 3, the speed fluctuation rate at high speed settings and the
It becomes possible to set almost the same speed fluctuation rate.

In the third session, '1lHd most equipment 2. of the second embodiment of the present invention. It is shown. This speed governor @z is the speed governor 2. of the first embodiment. Pin receiver 15 having a guide groove, 2/ at
The rut 20 can be adjusted vertically from the outside using an eccentric bin 22.

In this way, the same effect as in the case of the first embodiment can be obtained, and the speed j/work 1 variation rate can be easily finely adjusted from the outside while the engine is running, which improves engine operation. It becomes possible to set a speed fluctuation rate that matches the characteristics.

In the speed governor zl of the embodiment, the sliding engagement surface /lb for the movable pin 1 of the control lever // is formed into an appropriate curved shape to increase the height on the high speed setting side.
This is designed to reduce the maximum operating force of the roll lever //. In this way, the control lever/
If the maximum operating force of / is set to lower the child piece, the operability of &J can be further improved, especially when the control lever // is operated by remote control, and the durability can be improved.

FIG. 5 shows a +18 speed device z4 according to a second embodiment of the present invention. The speed governor z of the second embodiment has a guide groove, 2
．． The pin holder with / has the bracket dO as an eccentric pin,
:22, but in the speed governor z4 of this ≠Embodiment, the pin receiver has the bracket No. 0 carved into a flat plate shape, and the lid body! Bracket mounting base fixed to AF1 for vertical movement, rotating shaft 2 for mounting on 2H
j, and the rotation of the rotation shaft 2j can be adjusted from the outside using a rotation lever 23. By doing so, the pin holder is rotated by the rotating lever 23 to appropriately rotate the bracket 20 and guide it YNt.
, 2/ can be changed, and the pin receiver can adjust the vertical position of the bracket 20 by moving the bracket mounting base)≠ in the vertical direction. Therefore, by moving the bracket 20 up and down, the pin receiver can change the absolute value (initial value) of the rate of variation, and by rotating the bracket 20, it is possible to change the rate of speed variation in the rotation range. can.

FIG. 4 shows a speed governor 2 according to a second embodiment of the present invention. In contrast to the speed governor Z of the above-mentioned first embodiment, the pin holder is a bracket and the pin holder 20 can be moved up and down and rotated freely, whereas this speed governor B can only be adjusted by rotation. And.

The same operation and effect as the speed governor NZ and PI of the first embodiment can be obtained.

FIG. 7 shows NLo and l-speed device r (Z
s is shown. This number is the car's first speed device 2 of the embodiment.
In all of the speed governors of the above embodiments, when the control lever // is returned from the high speed side to the low speed side, the movable pin / is returned downward by the spring force of the governor spring /≠, On the other hand, this movable pin is forced to move downward by a return spring. In this way, when the movable pin /9 is forcibly pushed down by the return line link 2B, the relative relationship between the governor spring /≠ and the movable pin /7 and the guide groove J/ Even if the M1+7 force is large, the return spring allows the movable pin to smoothly move downward and follow the control lever.

Next, to explain the present invention in detail, the internal combustion (J(
3 Sekigawa n: 414' device uses the displacement force of the thruster of the centrifugal weight device, which changes the rotational position of the governor lever for controlling the fuel injection direction according to the rotational speed of the engine. The moment due to the spring force of the governor spring is set by balancing the moment due to the spring force of the governor spring and the moment due to the spring force of the governor spring.R is adjusted by changing the spring length of the governor spring and the knee length of the moment. As a result, it is possible to make the operating force of the governor lever correspond to the displacement force of the thruster at high speed setting and low speed setting, and as a result, the speed fluctuation rate at high speed setting and low speed installation This has the effect that it is possible to improve the engine's j1-turn characteristics by setting the speed fluctuation rates at substantially the same value.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the main part of a conventional speed governor, and Fig. 2 is a vertical cross-section of the main part of a fuel injection system equipped with m1M'TA4'Y'j t(-t) according to the first embodiment of the present invention. Figures 3 to 7 show the second embodiment of the present invention to the second embodiment h(11θ-0
It is a longitudinal cross-sectional view of the speed governor concerning this. ≠ ...Camshaft B ...Thruster 7 ...Governor weight ...Adjustment rack 10 ...Regulator shaft // I ...Control lever /ノ...First governor lever/3...Second governor lever/g...Governor spring L...Moment mij Length I)...
...Node center heavy erosion device (...link bar 4.JM J'f''.

Claims (1)

[Claims] A Il on one end of the camshaft (≠) of the fuel injection pump (X)
′! , 9 and is moved forward and backward in the 111111 direction by a governor weight (7) which is tilted appropriately according to the rotation speed of the camshaft (4').
A centrifugal weight device (P) having a centrifugal weight device (B) and a regulator shaft (10) rotated by a regulator handle.
The regulator shaft (1.
0) The moment around the regulator 'l1ll (/(1)) due to the displacement force of the thruster (1)) of the centrifugal weight device (P) engaged with the other end (/, 2b) The first governor lever (/, 2) whose rotational position is set appropriately according to the above-mentioned conditions, and the thruster (B) are rotated appropriately to adjust the displacement of the thruster (6) to the fuel injection pump (X). A first governor lever (/3) that acts to transmit information to the control rack (T), and one end (/I/La) of the governor spring (/≠) that rotates integrally with the regulator shaft (10). A control lever (//
) and a link lever mechanism (Q) to which the control lever (Q) is attached.
//) and one end (//) of the governor spring (/41)
≠a) As the control lever (//) is set from the low speed side to the high speed side, the cabana spring (/4
') and the arm length L of the moment around the regulator shaft (10) of the governor spring (/l/L)
) is engaged so as to simultaneously increase the speed at an appropriate rate.