JPS638358B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a splash oil amount detection device for a splash lubrication device in an internal combustion engine, etc. This invention relates to a splash oil amount detection device that directly detects oil splash.

[Conventional technology]

Generally, a splash lubrication device is used as a lubrication device for the crankshaft portion of an internal combustion engine.

As shown in FIG. 1, this splash type lubrication device has one end rotatably supported by a crankshaft 4 that is mounted on a crank chamber 7 of an internal combustion engine 1, and a free end that moves up and down inside a cylinder 2. piston 3
An oil dipper 6 protrudes from the lower end of the connecting rod 5 rotatably connected to the crankshaft 4.
With the rotation of the crank chamber 7, the lubricating oil 9 stored in the bottom 8 of the crank chamber 7 is scraped up by the tip 10 as shown by the arrow 11 and splashed over the entire crank chamber 7 as lubricating oil droplets 12. It is designed to lubricate components to be lubricated, such as crankshaft bearings, connecting rod bearings, and gears.

By the way, regarding this splash type lubrication device,
Since whether or not lubricating oil is sufficiently poured onto the lubricated components has a significant effect on the operation of the internal combustion engine, a device for detecting the appropriateness of the amount of oil splashed is required.

A conventional device of this kind measures the level of lubricating oil 9 stored in the bottom 8 of crank chamber 4, and if this level is above a set level, it is estimated that the amount of splashed lubricating oil is sufficient. A so-called lubricating oil storage amount detection device was used.

In addition, the splashed lubricating oil will eventually flow down along the inner surface of the side wall of the crank chamber and become the returning lubricating oil, so by measuring the amount of this returning lubricating oil, you can determine whether the amount of splashed lubricating oil is appropriate. A detection device has also been proposed (for example, Japanese Patent Laid-Open No. 59130/1983).

[Problem that the invention seeks to solve]

However, in any of the above conventional devices, if the internal combustion engine body is installed at an angle,
The level surface of the stored lubricant oil or returned lubricant oil fluctuates, making it impossible to accurately measure the level surface.
A large error occurs as to whether or not the actual amount of splashed lubricating oil is appropriate.

In addition, in devices that measure the amount of lubricant stored, waves are generated on the surface of the lubricant during splashing, so
There was a large dispersion in the measurement results on the level surface.

Furthermore, in the device that measures the amount of return lubricant,
Since the return lubricating oil flows down after lubricating the lubricated components, a large time delay occurs, making it difficult to accurately detect whether the current amount of lubricating oil is appropriate.

An object of the present invention is to provide a splash oil amount detection device for a splash lubrication device that can accurately detect the appropriateness of the amount of lubricant splashed onto a lubricated component.

[Means for solving problems]

In order to achieve the above object, the splash oil amount detection device of the splash lubrication device of the present invention uses an oil dipper that rotates together with the crankshaft to turn lubricant oil stored in the crank chamber into lubricant oil droplets to be lubricated. In a splash oil amount detection device for a splash lubrication device that detects the amount of oil splashed on a component part, a lubricant oil reservoir is connected to a side wall above the lubricant storage level of the crank chamber, and The upper part of the lubricating oil reservoir is formed with a window hole that communicates with the crank chamber and into which the lubricating oil droplets can directly enter, and the lower part of the lubricating oil reservoir is formed with a lubricating oil discharge hole that communicates with the crank chamber. A detecting means is provided for detecting the position of the residual lubricating oil level surface.

[Effect]

According to the above configuration, the oil dipper splashes lubricating oil as the crankshaft rotates, and countless lubricating oil droplets are generated in the crank chamber. This lubricating oil droplet adheres to the lubricated component and lubricates it, and a portion of it also flies into the lubricating oil reservoir through the window hole. The lubricating oil droplets flow into the crank chamber through the lubricating oil drain hole, but since the inner diameter of the lubricating oil drain hole is set to a certain size,
The amount flowing into the crank chamber is limited.

When the amount of lubricant droplets that fly into the lubricant oil reservoir is large, the amount of oil remaining in the lubricant oil reservoir increases and overflows from the window hole. If the position of the lubricant level surface at this time is detected by the detection means, it can be seen that the amount of splashed lubricant is sufficient.

Furthermore, when the amount of lubricant droplets flying into the lubricant oil reservoir is small, the amount of oil remaining in the lubricant oil reservoir is reduced. By detecting the position of the lubricant level surface at this time, it can be seen that the amount of splashed lubricant is insufficient.

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

FIG. 1 shows an embodiment in which the present invention is applied to a splash lubrication system for an internal combustion engine. The installation location is such that the effects of waves and level inclinations on the stored lubricating oil 9 can be avoided, and that the location is close to the crankshaft 4.
This is the upper part where part of the lubricating oil droplets 12 generated by the splashing of the oil dipper 6 as it rotates reaches.

This splashed oil amount detection device 14 is constructed as shown in FIGS. 2 and 3.

A case 16, which is the main body of the device 14, is formed from a non-magnetic material such as aluminum or synthetic resin into a hollow cylinder shape with a central axis in the vertical direction. It communicates with the crank chamber 7 through an opening 15 . A blind stopper 18 is screwed onto the upper end surface of the case 16 via a packing 17, and the hollow interior of the case 16 is isolated from the atmosphere. A window hole 19 is bored in the upper part of the cylindrical side wall of the case 16 at a portion directly facing the opening 15, and the lower part of the hollow part of the case 16 constitutes a lubricating oil reservoir 29. Lubricating oil reservoir 29
A lubricant oil discharge hole 20 that communicates with the crank chamber 7 is bored at the bottom of the lubricant oil reservoir 29 . The amount of oil that remains is proportional to the amount of drained oil that flows out.

A cylindrical protrusion 21 is concentrically protruded from the center of the bottom of the case 16.
An annular float 22 is fitted on the outer periphery so as to be movable up and down, and this float 22 is adapted to float in the residual oil in the lubricating oil reservoir 29. A permanent magnet 23 is integrally implanted in the float 22, and the magnet 23 is in the shape of a ring or a plurality of rods having bipolarity in the vertical direction. Further, a reed switch 25 that opens and closes in response to the position of the magnet 23 is inserted into the hollow part 24 of the cylindrical protrusion 21, and is fixed with a filler 26 or the like. A lead wire 30 whose other end is connected to a device or the like is connected.

Incidentally, as shown in FIG.
It is secured tightly and kept airtight from the atmosphere.

The operation of the splashed oil amount detection device according to the above configuration will be explained.

A portion of the lubricating oil droplets 12 generated by the splashing operation of the oil dipper 6 as the crankshaft 4 rotates enters the case 16 through the opening 15 and the window hole 19 in the side wall 13 . This lubricating oil droplet 12 flows into the lubricating oil reservoir 29, but since a substantially constant amount of oil corresponding to the flow path cross section of this hole 20 flows out from the discharge hole 20 into the crank chamber 7, the amount of inflowing lubricating oil is always maintained. An amount proportional to the amount remains in the lubricating oil reservoir 29. When the amount of lubricating oil flowing in per unit time is large, the amount of oil remaining in the lubricating oil reservoir 29 increases and overflows from the window hole 19, reaching the maximum level. As a result, the float 22 floats, and the permanent magnet 2 integrated with this float 22
3, the reed switch 25 embedded in the hollow portion 24 of the protrusion 21 is turned on.

Also, with respect to the amount of oil flowing out from the discharge hole 20,
When the amount of lubricating oil droplets 12 flying per unit time is small, the amount of oil remaining in the lubricating oil reservoir 29 decreases, and the float 22 and permanent magnet 23 descend, responding to the lowering of the magnet 23. reed switch 25
It becomes OFF state.

Based on this operation, by appropriately selecting the position and opening area of the opening 15, the position and opening area of the window hole 19, and the discharge flow rate through the discharge hole 20, the splash of the splash lubrication device can be improved. If enough oil is applied, turn reed switch 25.
The lubricant can be turned ON and turned OFF if insufficient, allowing detection to be performed to determine the appropriateness of the lubricating oil amount. This occurs not only when the amount of lubricating oil 9 stored in the bottom 8 of the crank chamber 7 is less than the normal value, but also when the rotation speed of the crankshaft 4 caused by the internal combustion engine 1 is low, or when the internal combustion engine 1 Lubricating oil splash 12 when driving on an incline
This means that even if the amount of lubricating oil decreases and the lubrication condition deteriorates, the switch 25 turns OFF and the deteriorating condition can be detected. By comparison, the suitability of the amount of splashed lubricant can be directly and accurately detected.

FIGS. 4 and 5 show other embodiments of the present invention, and the difference from the above embodiments is that the float 2
A permanent magnet 23 is installed at the bottom of the float 22, and a reed switch 25 is connected to the bottom of the case 16. The operation and effect are almost the same as those of the previous embodiment. According to this embodiment, compared to the previous embodiments, the structure is simpler, smaller, and cheaper.

In the above embodiment, the permanent magnet 23 is turned on when the residual amount in the lubricating oil reservoir 29 reaches the maximum level.
We have explained the case where the permanent magnet 2
By changing the relative relationship between the floating and sinking operation ranges in step 3, the ON state of the reed switch 25,
It is also possible to reverse the OFF state. Further, the lead wire 30 of the reed switch 25 may be connected to a power source, an alarm lamp, a buzzer, or a power source and an internal combustion engine stop controller.

Furthermore, in the embodiment described above, a case has been described in which a magnet-sensitive switch is used as a means for detecting the position of the float, but the present invention is not limited to this, and a limit switch or the like may be used. Further, as a detection means for continuously detecting the position of the float in the lubricating oil reservoir, it is also possible to detect the amount of lubricating oil splashed from time to time.

Incidentally, when the float position detecting means such as a reed switch is installed outside the crank chamber and the case as in the above embodiment, this detecting means is not directly affected by the chemical and thermal effects of the lubricating oil. Deterioration of insulating materials, fillers, etc. can be avoided, and durability and reliability can be improved.

〔Effect of the invention〕

As explained above, according to the present invention, since the lubricant droplets splashed up by the oil dipper are made to fly directly into the lubricant oil reservoir, the current amount of splashed lubricant oil can be detected. Furthermore, since the lubricating oil reservoir is provided separately from the crank chamber, the lubricating oil is not affected by ripples on the surface of the lubricating oil during splashing operation or fluctuations in the surface of the lubricating oil due to the tilt of the internal combustion engine body. It is possible to accurately detect the over-lubrication state.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the present invention, Fig. 2 is an enlarged vertical sectional view of the part in Fig. 1, Fig. 3 is a sectional view taken along the line of Fig. 2, and Fig. 4 is FIG. 5 is an enlarged vertical cross-sectional view of a portion corresponding to FIG. 2 showing another embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along the line of FIG. 4. DESCRIPTION OF SYMBOLS 1...Internal combustion engine, 4...Crankshaft, 5...Connecting rod, 6...Oil filter, 7...Crank chamber, 9
...Lubricating oil, 12...Lubricating oil splash, 13...Side wall, 14
... Splashed oil amount detection device, 15... Opening, 16...
Case, 19... Window hole, 20... Discharge hole, 22... Float, 23... Permanent magnet, 25... Reed switch, 2
9...Lubricating oil reservoir.

Claims (1)

[Claims] 1 Splashed oil amount detection of a splash lubrication device that detects the amount of lubricating oil stored in the crank chamber turned into lubricating oil droplets and splashed onto lubricated components by an oil dipper that rotates with the crankshaft. In the device, a lubricating oil reservoir is connected to a side wall above the lubricating oil storage level of the crank chamber, and a window in the upper part of the lubricating oil reservoir is connected to the crank chamber and into which the lubricating oil droplets can directly enter. A lubricating oil discharge hole communicating with the crank chamber is formed in the lower part of the lubricating oil drain hole, and a detecting means for detecting the position of a level surface of lubricating oil remaining in the lubricating oil reservoir is provided. Splash oil amount detection device for splash lubrication equipment.