JPS62178707A - Lubricating device of engine for vehicle such as motorcycle or the like - Google Patents

Abstract

PURPOSE:To suitably regulate lubricating oil corresponding to throttle opening and rotational frequency by connecting a throttle wire to one end of a movable link, a wire for varying the discharge rate of an oil pump to the midway portion in the longitudinal direction and a rotational frequency interlocking adjust wire to the other end of the link. CONSTITUTION:A wire 16a extended from a throttle grip 17 is connected to one end 45a of a movable link 45, and a throttle valve of a carburetor 10 is driven through a wire 16b. A wire 43 connected to means 40 for regulating the discharge rate of an oil pump is connected to the midway portion in the longitudinal direction of the movable link 45. A wire 46 extended from a servo motor 21 is connected to the other end 45b of the movable link 45, whereby the servo motor 21 drives the movable link 45 to the discharge rate increasing side according to an increase in rotational frequency of an engine.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a lubricating device for an engine for a vehicle such as a motorcycle, which allows lubricating oil to be properly supplied to the cylinders of the engine.

(Prior Art) In a motorcycle engine, a cylinder lubricating device is configured as follows, for example.

That is, a plunger type pump is provided that is driven by the engine and supplies lubricating oil to the cylinder.

On the other hand, a throttle grip that adjusts the throttle opening of the carburetor is connected to a discharge amount adjusting means that adjusts the plunger stroke of the pump.

Then, as the throttle opening is adjusted by operating the throttle grip, the plunger stroke changes, and this changes the pump discharge amount.

Lubricating oil is supplied in an amount commensurate with the throttle opening of the engine, that is, in an amount commensurate with the load (Japanese Patent Application No. 58-200500 filed by this applicant).

By the way, in the case of the above configuration, if the throttle opening is suddenly increased in order to accelerate suddenly in the low rotational speed range of the engine, a relatively small amount of lubricating oil is sufficient until the engine rotational speed reaches high speeds. However, since the pump discharge amount suddenly increases depending on the throttle opening, an excessive amount of lubricating oil is supplied into the cylinder.

Conversely, if the throttle opening is suddenly reduced in the high engine speed range, the throttle opening will be reduced even though a relatively large amount of lubricant is required until the engine speed reaches low speeds. In this case, the lubricating oil in the cylinder tends to run out because the discharge amount of the pump suddenly decreases depending on the throttle opening.

Therefore, if the throttle opening of the carburetor is suddenly opened or closed, and the engine speed does not respond well to this, the supply of lubricating oil into the cylinder will not be excessive or insufficient. In order to do this, the carburetor and the throttle grip are interlocked and connected by a movable link that moves in accordance with the rotation speed of the wire, thereby properly supplying the 01 lubricant that matches the throttle opening and engine rotation speed. (Japanese Patent Application No. 60-52877 filed by this applicant).

(Problems to be Solved by the Invention) In the above configuration, in order to interlock and connect the throttle grip and the discharge amount adjusting means, a movable member, a movable link, and a case covering each of these are interposed between them. It is set up. For this reason, the structure of the above-mentioned lubricating device has become complicated.

(Object of the Invention) This invention has been made with attention to the above-mentioned circumstances, and it is possible to appropriately supply lubricating oil to the cylinder in accordance with the throttle opening and the engine speed. The lubricating oil supply means can be easily applied to various throttle operation parts and discharge amount adjustment means, and the structure for connecting the throttle operation part and the carburetor and discharge amount adjustment means is simple. The purpose of this invention is to simplify the structure of an engine lubricating device.

(Structure of the Invention) The present invention for achieving the above object is characterized by a first
A movable link is provided to which one end of the wire is connected, and a second wire is provided with an end on the side of the throttle operating section at a longitudinal midway point of the movable link for interlocking the discharge amount adjusting means and the throttle operating section. The connecting portions of each wire to the movable link move approximately parallel to each other, and the other end side of the movable link moves approximately in the direction of movement of the connecting portion of each wire as the engine rotation speed increases. It is located at a point that moves in parallel directions.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In Figure 1, 1 is a 2-stroke engine.

This engine 1 has a cylinder 2, a piston 3, and a crankshaft 4, and the cylinder 2 has an intake port 6 and an exhaust port 7 formed therein. 8 is a spark plug.

A carburetor 10 is connected to the intake port 6 . This carburetor 10 has a piston valve 11.
1 is biased by a spring 13 in a direction to close the intake passage 12 of this carburetor IO.

The piston valve 11 is connected via an IF wire 16 to a throttle grip 17 which is a throttle operating section. The rotation of the throttle grip 17 causes the piston valve 11 to operate, thereby opening and closing the intake passage 12, thereby adjusting the throttle opening (2). Then, as the throttle opening becomes sharper, a large amount of air-fuel mixture is sucked into the cylinder 2.

On the other hand, the exhaust port 7 is provided with an exhaust adjustment valve 19 that opens and closes the exhaust port 7 according to the rotational speed of the engine 1 to improve combustion efficiency. This exhaust 3! The valve regulator 19 operates to close the exhaust port 7 and delay the exhaust timing when the engine 1 is rotating at a low speed (as shown by the two-dot chain line in FIG. 1), and opens the exhaust port 7 to advance the exhaust timing when the engine 1 is rotating at a high speed. (shown by solid line in the same figure). In this case, the means for opening and closing the exhaust regulating valve 19 in accordance with the rotational speed of the engine 1 is constructed as follows.

That is, the rotation speed of the engine 1 is detected by the ignition signal of the igniter unit 20 for operating the engine 1. On the other hand, the exhaust regulating valve 19 is driven by a servo motor 21, and the servo motor 21 is connected to the igniter unit 20 via a control unit 22.

The detection signal from the igniter unit 20 causes the servo motor 21 to be activated via the control unit 22.
is driven, thereby opening and closing the exhaust regulating valve 19 in accordance with the rotational speed of the engine 1 as described above.

24 is a plunger type pump, and this pump 24 reciprocates according to the rotational speed of the engine 1 to pump oil 11 into the cylinder 2.
It is configured as shown in FIGS. 2 and 3.

In the figure, reference numeral 25 denotes a pump case, and a plunger 26 is fitted into a cylinder hole in the pump case 25 so as to be slidable in the axial direction and rotatable about the axis. This plunger 26 is interlocked and connected to the crankshaft 4 by a worm gear device 28, and rotates around the axis as the crankshaft 4 rotates.

A cam means is provided on one end side of the plunger 26,
When the plunger 26 rotates, the plunger 26 is reciprocated in the axial direction by the seven stages of cams.

That is, the cam means has a cylindrical cam 30 coaxially formed on one end side of the plunger 26, and this cylindrical cam 30 has peaks 30a and valleys 30b alternately formed in the circumferential direction. There is. On the other hand, a rotary shaft 32 is provided which is rotatable about an axis perpendicular to the buttenger 26, and the cylindrical cam 30 is elastically slid onto the outer peripheral surface of the rotary shaft 32 by a spring 33. I'm forced to.

When the plunger 26 is rotated by the crankshaft 4 via the worm gear device 28, the cylindrical cam 3
The plunger 26 is caused to reciprocate by sliding the peaks 30a and troughs 30b of the plunger 26 on the outer circumferential surface of the rotating shaft 32.

Also, the pump case 25 on the other end side of the plunger 26
A pump chamber 34 is formed therein. This pump chamber 34 is connected to an oil sump 37 via a first check valve 36 and to the intake port 6 via a second check valve 38, so that when the plunger 26 reciprocates as described above,
1'' lubricating oil is sucked from the oil sump 37 and supplied into the cylinder 2 through the intake port 6.

The pump 24 is provided with a discharge amount adjusting means 40 that adjusts the plunger stroke to vary the discharge amount for each stroke of the pump 24.

The discharge amount adjusting means 40 has a protrusion 41 provided on one end surface of the plunger 26 and an eccentric cam 42 formed on the one-turn shaft 32. When the rotating shaft 32 is rotated, these protrusions 41 and the eccentric cam are connected so that the protrusions 41 come into contact with the outer circumferential surface of the eccentric cam 42 before the valley portion 30b of the cylindrical cam 30 comes into sliding contact with the outer circumferential surface of the rotating shaft 32. 42 is formed. Then, the plunger stroke is adjusted by selecting the engagement position of the protrusion 41 with respect to the eccentric cam 42 by rotating the rotation shaft 32.

The throttle grip 17 is connected to the rotating shaft 32 via a second wire 43, and the discharge amount of the pump 24 changes in accordance with the throttle opening degree by operating the throttle grip 17.

In FIGS. 1 and 4, the first wire 16 is divided in the middle, and the first wire 16 has a divided end 16a.
, 16b, a movable link 45 covered with a case 44 is interposed. One end side 45 of this movable link 45
A divided end 16a of the divided IF wire 16 on the throttle grip 17 side is connected to a. Further, the divided end 16b of the first wire 16 on the carburetor 10 side is connected to one end side 45& of the movable link 45 as described above. On the other hand, in the middle part of the movable link 45 in the longitudinal direction, the second
The throttle grip 1f side end of the wire 43 is connected,
The connecting ends of each wire 16.43 to this movable link 45 are arranged to move approximately parallel to each other. Furthermore,
The servo motor 2 is connected to the other end side 45b of the same link 45.
One end of an interlocking wire 46 interlocking with the movable link 45 is connected to the interlocking wire 46, and the connecting end of the interlocking wire 46 to the movable link 45 is moved in a direction substantially parallel to the moving direction of each connecting end of each of the wires 16 and 43. .

The connecting portion between the first wire 16 and one end side 45a of the movable link 45 will be explained with reference to FIGS. 5 to 7.

The split end 16a of the first wire 16 on the throttle grip 17 side and the split end 16b on the carburetor lO side are connected to each other by a cylindrical wire terminal 48. On the other hand, a terminal insertion hole 49 is formed in one end side 45a of the movable link 45, and a wire insertion path 50 extending from the terminal insertion hole 49 is formed. The wire terminal 48 is inserted into the terminal insertion hole 49 so as to be rotatable about its axis, and the wire terminal 48 is inserted into the wire insertion path 50 in each of the partial contraction portions 16a of the first wire 16.
, 16b are inserted, thereby connecting the middle portion of the first wire 16 to the one end side 45a of the movable link 45.

Furthermore, when the movable link 45 rotates, the first wire 16
A notch 51 is formed in the wall surface of the wire insertion passage 50 so that the divided ends 16a, 16b and the wall surface of the wire insertion passage 50 do not interfere with each other.

Next, the operation of the discharge amount adjusting means 40 by the throttle grip 17 will be explained in detail with reference to FIG.

In the state shown by the solid line in the figure, the throttle grip 17 is operated so that the throttle opening of the carburetor 10 is closed, and the engine 1 is in a low speed rotation range, and the pump 24 is operated by the servo motor 21 in conjunction with this. The plunger stroke of the cylinder 2 is adjusted so that the supply of lubricating oil to the cylinder 2 is reduced.

From the above state, as shown by the dashed line in the figure, the vaporizer lO
When the throttle grip 17 is operated to suddenly open the throttle, the movable link 45 is pulled by the divided end 16a of the first wire 16 on the throttle grip 17 side.
One end side 45a rotates around the other end side 45b.

In this case, unless the rotational speed of the engine 1 reaches a high speed, the rotational center position of the movable link 45 does not change much, so the tension of the second wire 43 connected to the middle part of the movable link 45 is small. It can be suppressed.

Therefore, by operating the slow/torque grip 17, an increase in plunger stroke is suppressed compared to directly operating the discharge amount adjusting means 40, and excessive supply of lubricating oil to the cylinder 2 is prevented.

When the rotational speed of the engine 1 begins to increase after a period of time has elapsed since the throttle grip 17 was operated, the interlocking wire 46 is pulled by the servo motor 21 as shown by the two-dot chain line in the figure. Therefore, the movable link 45
Contrary to the above, the other end side 4 is centered around the one end side 45a.
5b is rotated. In conjunction with this, the second wire 43 is pulled, the plunger stroke is increased, and the supply of lubricating oil to the cylinder 2 is increased to an appropriate value.

On the other hand, when the throttle grip 17 is operated to suddenly reduce the throttle opening from the state shown by the two-dot chain line in FIG. The one end side 45a of the movable link 45 rotates around the other end side 45b. In this case, unless the rotational speed of the engine 1 reaches a low speed, the rotational center position of the movable link 45 does not change much, so that the pushing movement of the second wire 43 can be kept small. Therefore, by operating the throttle grip 17, the decrease in plunger stroke is suppressed more than by directly operating the discharge range adjusting means 40, and insufficient supply of nη lubricating oil to the cylinder 2 is prevented.

When the rotational speed of the engine 1 begins to decrease as time passes from the operation of the throttle grip 17, the interlocking wire 46 is pushed by the servo motor 21 accordingly. Therefore, contrary to the above, the movable link 45 is attached to the one end side 45a.
The other end side 45b is rotated around . and,
The second wire 43 is pushed and the plunger stroke is reduced to reduce the supply of lubricating oil to the cylinder 2 to a proper value.

(Effects of the Invention) According to the present invention, the lubrication pump discharges water by operating the throttle operation section. When adjusting the adjustment means, the engine speed condition at the time of this operation can be determined because the discharge can intervene in the adjustment of the adjustment means. 1. If the throttle opening is suddenly opened or closed, the engine speed will respond to this. Even if the timing does not follow well, lubricating oil can be appropriately supplied to the cylinder in accordance with the throttle opening and the engine speed.

Moreover, in this case, the means for intervening in the adjustment of the engine rotational speed by the discharge j11 adjustment means as described above is achieved by interposing a movable link in the middle of the first wire connecting the throttle operation section and the carburetor, and The link and the discharge amount adjusting means are connected by a second wire. In this case, since the wire is flexible and long, the shape and arrangement of the throttle operation part and the discharge amount adjusting means are A movable link can be inserted by selecting a desired part without being affected by this. Therefore, this lubricating device can be easily applied to various throttle operation parts and discharge amount adjusting means.

Further, since the throttle grip and the wire extending from the carburetor or the discharge amount adjusting means are connected to each other by a single movable link, conventionally, a movable member is interposed in the middle of the first wire, and this movable member Compared to the case where one end of the second wire is connected to the wires and the wires are connected with a movable link interposed in the middle of the second wire, a movable member is unnecessary and a case that covers the movable member. Therefore, the engine lubricating system having the means for connecting the throttle grip and the carburetor 1 discharge amount adjusting means can have a simple structure.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is an overall view, Fig. 2 is a cross-sectional view of the pump and the discharge 1m adjusting means, Fig. 3 is a cross-sectional view taken along the line ■-■ in Fig. 2, and Fig. 4 The figure is a partially enlarged sectional view of Fig. 1, Fig. 5 is a partially enlarged view of Fig. 4, and Fig. 6 is a partially enlarged sectional view of Fig. 5.
7 is a sectional view taken along the line -Vl in FIG. 5. FIG. 1. Engine, 2. Cylinder, 6. Intake boat,
to・Fist carburetor, 16・・First wire, 17@・Throttle grip (throttle operation part), 21・・Servo motor, 24・・Pump, 40・・Discharge amount adjusting means, 43
...Second wire, 45...Movable link, 45a...One end side, 45bφ/Other end side. 24 21!1 Figure 3

Claims (1)

[Claims] 1. The carburetor connected to the engine is interlocked and connected to the throttle operating part by a first wire so as to adjust the throttle opening degree of the carburetor, and a pump is provided for feeding lubricating oil into the cylinder of the engine, and this pump is provided. A discharge rate adjusting means for making the discharge rate of the pump variable is provided, and the throttle operation section and the discharge rate adjusting means are arranged in a second mode so that the discharge rate of the pump changes as the throttle opening of the carburetor is adjusted. In a lubricating device for an engine of a vehicle such as a motorcycle, which is interlocked with a wire, a movable link whose one end side is connected to the middle part of the first wire is provided, and the second wire is connected to the middle part of the second wire in the longitudinal direction of the movable link. The ends on the side of the throttle operating section are connected so that the connecting portions of the wires to the above movable link move approximately parallel to each other, and the other end side of the movable link moves the connecting portions of the wires as the engine speed increases. A lubricating device for an engine for a vehicle such as a motorcycle, characterized in that the device moves in a direction substantially parallel to the direction of movement.