JPH02259246A - Governor for internal combustion engine - Google Patents

Abstract

PURPOSE: To appropriately adjust operating characteristics according to the warming state by incorporating two types of springs of a connecting member, in a governor for performing fuel metering through the connecting member by the extending movement of fly weights by centrifugal force proportional to the engine speed. CONSTITUTION: A governor incorporated in a fuel injection pump is provided with two fly weights 5 to be outward moved against a governor spring 8 by centrifugal force proportional to the engine speed, and a shifter sleeve 7 is axially moved by the movement through an angle lever 6. A fuel metering control rack 3 is axially displaced through a floating lever 12 and a connecting member 13. In this case, a slider 27 of a facing stopper 16 to be collaborated with a full load stopper 15 is supported by an adjusting shaft 30 having an eccentric body. The slider 27 is allowed to abut to the adjusting shaft 30 by a return spring 31 in the start of warming or by a start spring 36 in the start of cooling.

Description

[Detailed description of the invention] [Industrial application field] The invention relates to a governor according to the preamble of claim 1.

[Prior Art] A governor of this kind is already known from DE-OS 3641794. The governor is equipped with a flyweight adjuster that generates an adjustment force that is dependent on the engine speed, and which acts via the governor lever on a control rack that serves for metering control. A connecting member is disposed between the governor lever and the control rack, and a slider is movably disposed within this connecting member, and this slider is loaded by a start spring in the direction of increasing the injection amount and is fully loaded. It works together with the stopper. However, in this configuration, the slider adjustment for more precisely adapting the full load to the fuel requirements of the corresponding engine is possible after removal of the coupling member, for example by inserting a separator plate between the slider and the coupling member. This is only possible, and therefore extremely troublesome.

Moreover, the use of a separating plate not only changes the injection quantity at full load, but also adjusts the injection quantity over the entire operating range of the engine, even when idling, thus requiring complicated corrections.

[Problems of the present invention] The object of the invention is to eliminate the above-mentioned drawbacks.

[Means for Solving the Problems] The gist of the present invention that solves the above problems is as set forth in claim 1.

[Operations and Effects of the Present Invention] According to the present invention, it is possible to easily move the opposing stopper without adjusting the length of the connecting member or other operating characteristic values, such as the idling amount.

Advantageous developments of the invention are specified in the further claims. According to the configuration described in claim 2, it is possible to provide the connecting member with a space-saving structure. According to the configuration described in claim 3, it is possible to perform temperature-dependent increase control at start. According to the configuration described in claim 4, fine stepwise operation of the adjustment shaft is possible. According to the structure set forth in claim 5, the rotatability of the adjustment shaft is fixed within a predetermined limit.

[Embodiment] FIG. 1 shows the main parts of a minimum/maximum speed governor. The governor is integrated into a fuel injection pump, of which a housing 11, a camshaft 2, and a control rack 3 serving as a metering control element are shown. The camshaft 2 is driven at a rotational speed proportional to the engine rotational speed to drive the flyweight adjuster 4. The flyweight adjustment machine 4 is equipped with two flyweights 5, and the flyweights 5 are driven by a governor spring 8 due to the centrifugal force that increases as the rotational speed increases.
moves outward against the force of the angle lever to operate the shifter sleeve 7. The shifter sleeve has an annular groove 10 in which a governor lever 11 is disposed.
The floating tipper 12 is engaged with the other end 12a of the floating tipper 12.
It is connected to the connecting member 13 of the control rack 3 at 2b. The control rack 3 can be moved in the adjustment direction I indicated by the double arrow, in which case it can be moved to the left (
+) causes an increase in the injection amount, and movement to the right (-) causes a decrease in the injection amount. A full-load stop 15 is connected to the governor casing 14, which cooperates with a counter-stop 16 arranged movably in the adjustment direction in the coupling member. Full load stopper 15
does not have to be fixed, but may be adjusted, for example, depending on the atmospheric pressure or, if the engine is equipped with a booster, depending on the boost air pressure.

As can be seen in detail from FIGS. 2 to 4, the connecting member 1
3 is at the end of the side facing the floating tindaleper 12,
It has a fork-shaped extension 21 consisting of two supports 20, each with a lateral hole 19. both supports 20
An end portion 12a of the floating dipper 12 is disposed therebetween, and the 70-tip dipper 12 is connected to the connecting member 13 via a bolt 22 passing through a horizontal hole 19.

On the side facing the control rack, the coupling element 13 is provided with a fork-shaped extension 24, which likewise consists of two supports 23. Both appendages 21.24 of the connecting member 13
are connected to each other by two curved members 25 arranged in one plane.

The counter stop 16 is formed by a slider 27 guided in a vertical hole of the connecting member 13 and a transverse pin fixed to the slider and projecting from the connecting member through its length. The slider 27 is supported on the side facing the control rack 3 by an adjustment shaft 30 passing through a fork-shaped appendage. The slider 27 is connected to the connecting member 13 during warm-up and startup.
During a cold start, the return spring 31 is supported inside and is pressed against the adjustment shaft by the start spring 36. A working member 34 whose length changes depending on the temperature is provided between the return spring 31 and the slider 27, and a plate 35 guided in the vertical hole 26 is supported on this working member. There is. A start spring 36 is arranged between the plate 35 and the slider 27. The working member 34 can be formed, for example, from an elongated substance generator. A bottle 37 projects from the working member 34 toward the plate 35 and engages in a recess 38 of the plate 35. I35
A guide pin 39 protrudes from the slider 27 toward the slider 27, and the guide pin 39 is inserted into the hole 40 provided in the slider 27.
The starting spring 36 is also arranged in this hole.

The working member 34 is equipped with a collar 41, and this collar 41
The return spring 31 is engaged. The working member 34 is guided so as to be axially movable within a sleeve 42, which is held between the bending members 25.

The adjustment shaft 30 is provided with an adjustment eccentric 30a in a region located between the supports 23, and has a central hole 32 coaxial with the horizontal hole 19 of the support 23.
A connecting bolt 33 is inserted through the connecting bolt 33 for connection to the control rack 3. An operating lever 43 is unrotatably connected to the end of the adjusting shaft 30, and this operating lever 43 protrudes from the adjusting shaft 30 toward the connecting member 13.
It has a bent lever arm 44 at its end. This lever arm 44 is provided with a hole 45 in its end region. The connecting member 13 has a raised part 46 with a flat part 47 in the area covered by the operating lever 43 . For example, five vertical grooves 48 are arranged at uniform intervals in this plane part 47, and in these vertical grooves 48, a lever arm 44 has a nose 4 that protrudes from the end surface facing the connecting member 13.
9 is engageable. The operating lever 43 is provided with stop noses 50 on both sides of the lever arm 44 in the vicinity of the adjustment shaft 30 .

During a cold start of the internal combustion engine, the working member 34 is short and the plate 35
does not contact the slider 27, but the start spring 3
6, it is crimped onto the working member 34. Opposing stopper 1
When the horizontal pin 29 of No. 6 comes into contact with the full load stopper 15, the slider 27 moves in the direction of increasing the injection amount against the force of the start spring 36 until it comes into contact with the plate 35. As the temperature rises, the length of the working member 34 increases and the working member becomes the pan 3.
The slider 27 comes into contact with the slider 27 via 5. This releases the function of the start spring 36. A subsequent extension of the working element 34 is possible under compression of the return spring 31 towards the sleeve 42 , with the working element 34 extending towards the sleeve 42 .
It is possible to move within.

A tool for rotating the operating lever 43 can be inserted through an opening provided in the governor casing 14. The tool then engages in the bore 45 of the lever arm 44. The adjustment shaft 30 is adjusted in multiple stages by the operating lever 43. The number of adjustment stages is defined by the number of longitudinal grooves 48. Possible adjustments of the adjustment distance of the control rack 3 in this case include, for example, two times of 0.1 division in the direction of increasing the injection quantity and 0.1 division in the direction of decreasing the injection quantity. In is performed twice each time. The engagement of the operating lever 43 with the coupling member 13 allows reliable adjustment of the governor casing 14 from the outside without the need to visually inspect the coupling member. The maximum adjustment amount of the adjustment shaft 30 is limited by the fact that the actuating lever 43 rests with its stop nose on the protrusion 46 when reaching a predetermined angle of rotation in both rotational directions.

In order to adjust the movement of the opposed stopper 16 and thus the slider 27 in the direction of increasing the injection amount, the adjustment shaft 30 has an adjustment eccentric body 30a so that the slider 27, together with the working member 34, receives the force of the return spring 31 at the time of warm-up and startup. On the other hand, during a cold start, the connection member 13 acts against the force of the start spring 36.
It is rotated so that it is pushed inward. In order to adjust the movement of the slider 27 in the direction of decreasing the injection amount, an adjustment eccentric 30 is used.
Since the effective radius of a is relatively small, the adjustment shaft 3 is moved so that the slider 27 is pushed back near the adjustment shaft again by the force of the return spring 31 or the start spring 36.
0 is rotated.

In the second embodiment shown in FIG. 5, unlike the first embodiment, temperature-dependent start increase control is impossible and unnecessary. The slider 127 is directly supported by the connecting member 113 via the return spring 31 on one side, and supported on the adjusting eccentric 130a of the adjusting shaft 130 on the other side. 7 of the connecting member 113 facing the control rack 3
Oaky addition! 124 is formed so that the adjustment shaft I30 and the connection bolt 133 can be arranged in front and behind each other. Adjustment of the movement of the opposing stopper 116 and thus the slider 127 is performed in the same manner as in the embodiment of FIG.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram of the present invention, FIG. 2 is a partial vertical sectional view of the first embodiment of the present invention, and FIG. 3 is a plan view of FIG. 2 viewed from the left.
Fig. 4 is a view of Fig. 3 seen from the left, and Fig. 5 is a view of the second embodiment of the present invention.
FIG. 3 is a plan view of the embodiment. l...Casing 2...Camshaft, 3...Distribution control member (mount roll rack), 4...Fly weight adjuster, 5...Fly weight, 6 river angle lever
7...Sick sleeve, 8...Governor spring,
lO...Annular groove, 11...Governor lever 12...
70-Tindareper 13...Connecting member 14...
ff/<na casing, 15...Full load stopper, 16...Opposing stopper, 19...Horizontal hole, 20...
- Support body, 21... Additional part, 22... Bolt, 23
...Support body, 24...Additional part, 25...Curving member 26...Vertical hole, 27...Slider, 28...Long hole, 29...Horizontal pin, 30... Adjustment axis, 30a...
Adjustment eccentric body, 31... Return spring, 32 River center hole, 33
... Connecting bolt, 34... Working member, 35... Disc, 36... Start spring, 37... Bottle, 38...
・Concave part, 39...Guide bottle, 40...Hole, 41・
...Brim, 42...Sleeve, 43...Operation lever 44...Lever arm, 45...Hole, 46...
Raised portion, 47... Flat portion, 48... Vertical groove, 49...
・Nose, 50...Stotsuba nose

Claims (1)

[Claims] 1. A governor for an internal combustion engine, which includes a flyweight adjuster (4) useful for controlling rotational speed, and a metering control member (3)
a governor lever (11) disposed between the flyweight regulator and the flyweight adjuster to enable arbitrary changes in injection quantity; and a full load stopper (15) for the metering control member (3) coupled to the governor casing. , a coupling member (13) serving as a pivot point between the metering control member (3) and the governor lever (11), and a full-length valve arranged movably in this coupling member against the force of a return spring (31). Load stopper (1
5), in which the opposing stop (16) is connected by means of its outward end face facing the pivot point (24) of the connecting member (13). The adjusting eccentric (30a) of the adjusting shaft (30), which is supported in the coupling member (13) at right angles to the longitudinal axis of the member (13), rests on the adjusting eccentric (30a), with the adjusting shaft (30) resting against the counterstop ( 16) can be rotated by a certain limited rotation angle for fine adjustment of the adjustment eccentric (30a), and the opposing stopper (16) is at least indirectly operated by the return spring ( A governor for an internal combustion engine, characterized in that it is supported by a connecting member (13) via a governor (31). 2. The pivot point (21, 24) of the connecting member (13) is 2.
It is formed by a fork-shaped extension with two supports (20, 23) each having one transverse hole (19) and one pivot point (24). Adjustment shafts (
30) is supported, which adjusting shaft (30) is only connected to the adjusting eccentric (30a) in the area located between the supports (23).
) and a hole (23) coaxial with the transverse hole (19) of the support (23). 3. The counterstop (16) is an actuating member (16) which changes its effective length depending on the temperature, at least indirectly via a compressible starting spring to produce a starting increase.
34), and this actuating member is supported by a return spring (34).
Claim 1 or 2, wherein the opposing stopper (16) is supported by the connecting member (13) via the stopper (1) and locks the starting movement of the opposing stopper (16) in order to prevent an increase in the amount at the start during warm-up.
Governor listed. 4. An operating lever (43) protrudes from the adjustment shaft (30), and this operating lever rotates the connecting member (1) at various rotational positions.
Any one of claims 1 to 3 that can be engaged with 3)
Governor as described in section. 5. The operating lever (43) has a stopper (50) in both rotation directions.
) and abuts the coupling member (13) upon reaching a predetermined angle of rotation.