JPH051809Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an oil deterioration detection device, and in particular, it easily and accurately detects the oil deterioration state of vehicle drive system equipment, and performs oil changes at appropriate times.
The present invention relates to an oil deterioration detection device that can easily detect the oil deterioration state of each device and improve usability.

[Conventional technology]

In vehicles, friction causes loss in the moving parts of internal combustion engines and other moving parts, which not only reduces output, but also causes wear and generates high heat, causing the equipment to seize. It is necessary to provide lubricating oil to reduce friction. However, the properties of the lubricating oil deteriorate due to foreign matter such as abrasion particles and dust from moving parts, or heat and oxidative deterioration, resulting in poor lubrication, so it is difficult to detect the properties of the oil. If the oil is heavily contaminated, it is necessary to change the oil. For example, as a device for detecting contamination of lubricating oil,
It is disclosed in Publication No. 40231. This device electrically detects contamination of lubricating oil, and includes an oil transmittance measuring mechanism consisting of a light emitting part and a light receiving part.
It has an indication correction circuit based on the type of oil, a dirt system correction circuit based on usage time, a replacement mechanism based on a pump action, and a mechanism that indicates when oil is running out. Further, an oil deterioration detection device is disclosed in Japanese Utility Model Application Publication No. 170403/1983. This device detects the deterioration state of engine oil, and includes an oil check path that communicates with the oil chamber in the oil pan so that the oil can pass through, and a light emitter and a light receiver that are placed across the oil check path. The oil quality deterioration alarm device is configured to be operable to notify based on a change in the output signal of the device.

[Problem that the invention attempts to solve]

By the way, conventional methods for detecting the properties of oil and determining when to change the oil include, for example, extracting the oil and determining the dirtiness or color, or determining when to change the oil based on mileage, usage conditions, etc. Was. However, in either case, it is difficult to accurately detect the state of oil deterioration, and the detection work is troublesome. In addition, economic losses may occur due to the replacement of usable oil,
The use of oil with a high degree of deterioration caused damage to internal combustion engine parts. Furthermore, in conventional oil deterioration detection devices, the light emitted by the light emitting part is not guided from the light emitting part and is directly irradiated into the oil, so it is difficult to detect changes in the intensity of the light irradiated into the oil or the light emitted from the light projection window. It was not possible to accurately detect oil deterioration due to the influence of transmission loss fluctuations. In addition, it is necessary to arrange the light emitting part and the light receiving part close to the oil that heats them, and due to their structure, the light emitting part and the light receiving part are likely to be affected by the oil heat and cause functional deterioration. It has not been possible to actually use these built-in devices that integrate a light emitting part and a light receiving part.

Furthermore, the conventional device is inconvenient because it can only detect the oil deterioration state of one device and is difficult to install. Furthermore,
When the oil in the transmission and the differential is deteriorated, there is no way to detect the deterioration unless the drain pipe is opened and the oil is removed.
Deterioration was determined based on mileage, usage conditions, etc. and replaced. However, as described above, it is difficult to accurately detect the state of oil deterioration, and the detection work becomes troublesome.

[Purpose of invention]

Therefore, the purpose of this invention is to easily detect the deterioration state of oil in each device in order to eliminate the above-mentioned disadvantages, and to correct the relationship between the permeability and deterioration rate of the oil according to the type of oil. This allows the oil deterioration state to be easily and accurately detected, and the oil to be replaced at the appropriate time, thereby preventing economic losses caused by replacing usable oil and preventing damage to parts due to the use of oil with a high degree of deterioration. Another object of the present invention is to realize an oil deterioration detection device that can easily selectively detect the oil deterioration state of each device, improve usability, and can be easily put into practical use.

[Means for solving problems]

In order to achieve this objective, this invention provides an oil deterioration detection device that has a light emitting part and a light receiving part and detects oil deterioration. Also, a plurality of optical waveguides are provided for guiding the light passing through the oil to the light receiving section, and a display section is provided for displaying a state of oil deterioration in response to a change in the light transmittance detected by the light receiving section, A fixed body in which the inlet end and the outlet end of the optical waveguide are assembled, a movable body in which the light emitting part and the light receiving part are incorporated and can be rotated with respect to the end face of the fixed body, and by rotating this movable body. A switching detection mechanism is provided having a switching operation body for instructing to selectively detect an oil deterioration state of one of the devices, a cord connecting metal plate is provided on the movable body, and a cord connecting metal plate is provided on the fixed body. A plurality of position codes are provided to be selectively connected, and each position code is connected to an amplifier that corrects the relationship between the transmittance of the oil in the equipment and the degree of deterioration and outputs an electric signal to the display section. It is characterized by having been provided with

[Effect]

According to the configuration of this invention, the light from the light emitting part is
The light is guided by the optical waveguide, irradiated into the oil, and then guided to the light receiving section. At this time, the light passing through the oil is attenuated in proportion to the degree of deterioration of the oil. Due to the attenuation of this light, the light receiving section detects the light transmittance, and in response to this change in light transmittance, the amplifier corrects the relationship between the light transmittance of the oil and the degree of deterioration and outputs an electrical signal to the display section. The display will show the oil deterioration status. Therefore, the state of oil deterioration can be easily and accurately detected, and the oil can be replaced at the appropriate time, thereby preventing economic losses caused by replacing usable oil and preventing damage to parts due to the use of oil with a high degree of deterioration. prevent. Furthermore, since the switching detection mechanism can selectively detect the oil deterioration state of each device, the detection work becomes easier and the usability is improved. Furthermore, since the light emitting part and the light receiving part are connected by an optical waveguide, the light emitting part and the light receiving part, which are easily affected by heat, can be placed away from the heating oil, thereby extending the usable life. , to facilitate practical application.

〔Example〕

Embodiments of this invention will be described in detail and specifically below based on the drawings.

1 to 8 show examples of this invention. In the figure, 2 is a chassis, 4 is an internal combustion engine, 6 is a transmission, 8 is a propulsion shaft, and 10 is a differential. The internal combustion engine 4, the transmission 6, and the differential 10, which are devices in the vehicle drive system, are provided with an oil deterioration detection device 12 that detects the oil deterioration state of each of these devices.

This oil deterioration detection device 12 includes a switching detection mechanism 18 incorporating a light emitting diode 14 as a light emitting part and a photodiode 16 as a light receiving part, and inlet ends 26a, 28a, 30a in this switching detection mechanism 18.
The output ends 26b, 28b, and 30b are assembled into three optical waveguides 26, 28, and 30 with irradiation sections 20, 22, and 24 interposed therebetween, respectively. These optical waveguides 26, 28, and 30 are constructed by coating optical fibers with a coating material.

That is, the switching detection mechanism 18 is constructed as shown in FIGS. 2-6. The light emitting diode 14 and the photodiode 16 are inserted and oriented in the axial direction of the movable body 32. In addition, the entrance ends 26a, 28 of the first, second, and third optical waveguides 26, 28, 30
a, 30a and outlet ends 26b, 28b, 30b
are inserted and oriented in the axial direction of the fixed body 34. A movable body 32 is disposed on one end surface 34f of the fixed body 34.
The movable body 32 is rotatably attached to the fixed body 34 with one end surface 32f in contact with the movable body 32. Movable body 3
2 is connected to a rotary plate 42 to which a switching operation body 40 is fixed via a support shaft 38 mounted in a shaft hole 36. The rotary plate 42 is surrounded by a fixed indicator plate 44 that indicates the oil selection position. That is, the instruction plate 44 includes, for example, "ENGIN OIL" which instructs detection of oil deterioration in the oil pan of the internal combustion engine 4, and "MISSON OIL" which instructs detection of oil deterioration in the transmission case 6.
Then, "DEF OIL" is displayed, which instructs detection of oil deterioration in the differential case of the differential 10. Further, in order to provide moderation to the movable body 32 at a predetermined oil detection and display position when the movable body 32 is rotated by the switching operation body 40, a moderation mechanism 46 is provided on the end surface 32f side of the movable body 32. is 3
balls 48 and these balls 48 on the end surface 32f.
Three springs 50 are provided to press the housing to the side. The balls 48 protrude from the end surface 32f and are inserted into and removed from three ball holes 52 formed in the end surface 34f of the fixed body 34. Movable body 32 and fixed body 3
4, the supporting shaft 38 inserted into the movable body 32 is extended, and the extended portion of the supporting shaft 38 is inserted into the shaft hole 54 of the fixed body 34 and rotatably mounted.

The movable body 32 has a light emitting diode 14 connected to the first, second, and third optical waveguides 26 of the fixed body 34 in order to detect oil deterioration of a selected device when the movable body 32 is rotated. 28, 30, and the photodiode 16 is located at one of the first, second, and third optical waveguides 26, 28, 30 of the fixed body 34. They are arranged at outlet ends 26b, 28b, and 30b of. Further, a cord connecting metal plate 56 is embedded in the end surface 32f of the movable body 32. This cord connecting metal plate 56 is connected to the fixed body 3
4 position codes 58, 60,
62 is selectively connected. That is, the switching operation body 40
When the cord connection metal plate 56 is placed in the "ENGIN OIL" position, the cord connecting metal plate 56 is placed in the first position cord 58-1.
and the first position cord 58-2, and when the switching operation body 40 is positioned at "MISSION OIL", the second position cord 60-1 and the second position cord 60-2 are connected. Furthermore, when the switching operation body 40 is positioned at "DEF OIL", the third
Connect the position cord 62-1 and the third position cord 62-2. These first, second, and third position cords 58, 60, and 62 are connected to an amplifier 64, as shown in FIG. This amplifier 64 corrects the relationship between the oil transmittance and the degree of deterioration of each device by connecting one of the first, second, and third position codes 58, 60, and 62,
An electrical signal is output to a display section 66 installed in the driver's cab (not shown). This display section 66 indicates that the amplifier 6
The oil deterioration state is displayed by the signal from 4.

On the other hand, the first, second and third optical waveguides 26, 28,
The first, second and third irradiation parts 20, 2 interposed in 30
2 and 24 are constructed as shown in FIG. For example, in the first irradiation section 20, the first optical waveguide 26
is the first optical waveguide 26-1 on the light emitting diode 14 side.
and the first optical waveguide 26-2 on the photodiode 16 side.
It is separated into The first optical waveguide 26-1 is covered with a metal tube 68-1 and has a hollow portion 7 formed in the insertion portion 74 from the head 72 side of the bolt-shaped fixture 70.
6, and an irradiation side member 78 made of a glass plate or a transparent plate is attached to the end face thereof.
Further, the first optical waveguide 26-2 includes a metal tube 68-2.
is inserted into the hollow portion 76 from the head 72 side, and an incident side member 80 having the same configuration as the irradiation side member 78 is attached to the end face thereof. Irradiation side member 78
and the entrance side member 80 are disposed facing each other and have a space through which oil passes. A threaded portion 82 is formed on the outer peripheral surface of the insertion portion 74 of the fixture 70 to be screwed into an oil pan or the like. By attaching the fitting 70 to an oil pan or the like, oil flows into the hollow part 76, and the light from the light emitting diode 14 is irradiated into the oil from the irradiation side member 78, and the light that has passed through the oil is directed to the incident side. The light enters from the member 80 and is guided to the photodiode 16. Second irradiation section 22
Since the third irradiation section 24 is configured similarly to the first irradiation section 20 described above, the description thereof will be omitted here. The second irradiation section 22 is attached to the transmission case of the transmission 6, and the third irradiation section 24 is attached to the differential case. Note that 84 is a switch, and 86 is a battery.

The operation of this embodiment will be explained below.

If you want to detect the oil deterioration state of the internal combustion engine 4, move the switching operation body 40 to the "ENGIN" position on the indicator board 44.
OIL” position. As a result, the movable body 32
rotates, and the light emitting diode 14 connects to the first optical waveguide 2.
6 and a photodiode 16 is located at the exit end 26b of the first optical waveguide 26 . At this time, the cord connecting metal plate 56 connects the first position cord 58. Then, when the switch 84 is turned on, the light emitting diode 14 emits light due to the application of voltage. This light is the first
The light is guided by the optical waveguide 26-1 and irradiated into the oil from the irradiation side member 78 of the first irradiation section 20. The light that passes through this oil is attenuated in proportion to the degree of deterioration of the oil. This attenuated light is guided by the first optical waveguide 26 - 2 through the incident side member 80 and reaches the photodiode 16 . The photodiode 16 detects the transmittance of the attenuated light, converts this value into an electrical signal, and sends the signal to the amplifier 64.
Output to. At this time, the amplifier 64 corrects the relationship between the light transmittance and the degree of oil deterioration of the internal combustion engine 4 because the first position cord 58 is connected. As a result, the amplifier 64 accurately determines the oil deterioration state of the internal combustion engine 4, and the display unit 66
Outputs the amplified signal. This display section 66 is
Displays the degree of oil deterioration. That is, the change in light transmittance has a correlation with the amount of soot mixed into the oil. The amount of soot mixed into the oil has a great effect on oil deterioration, so detecting the amount of soot is an index for detecting oil deterioration. Therefore, a change in light transmittance can be an indicator of oil deterioration.

If you want to detect the oil deterioration state of the transmission 6, move the switching operation body 40 to the "MISSON" position on the indicator plate 44.
OIL", the light emitting diode 14 is located at the entrance end 28a of the second optical waveguide 28, and the photodiode 16 is located at the exit end 28b of the second optical waveguide 28. At this time, the cord connecting metal plate 56 connects the second position cord 60. The deterioration state of the oil in the transmission 6 is carried out in the same manner as in the case of the oil in the internal combustion engine 4 described above.
The explanation will be omitted here.

If you want to detect the oil deterioration state of the differential 10, move the switching operation body 40 to the “DEF” position on the indicator plate 44.
OIL, the light emitting diode 14 is located at the entrance end 30a of the third optical waveguide 30, and the photodiode 16 is located at the exit end 30b of the third optical waveguide 30. At this time, the cord connecting metal plate 56 connects the third position cord 62. The deterioration state of the oil in the differential 10 is performed in the same manner as in the case of the oil in the internal combustion engine 4 described above, so a description thereof will be omitted here.

As a result, oil deterioration conditions are easily and accurately detected. This allows oil to be replaced at the appropriate time, prevents economic losses due to replacement of usable oil, and prevents damage to equipment due to the use of oil with a high degree of deterioration. Also,
Light from the light emitting diode 14 is transmitted to each optical waveguide 26,
28 and 30, it is possible to prevent inconveniences such as fluctuations in light transmission loss and to accurately detect oil deterioration conditions. Furthermore, heat-sensitive light emitting diode 1
Since the photodiode 4 and the photodiode 16 can be installed apart from the heating oil, the influence of heat can be prevented, the service life of each diode can be extended, and practical use can be easily achieved.

In addition, the pair of light emitting diodes 14 and photodiodes 16 can selectively detect the oil deterioration state of a plurality of devices such as the internal combustion engine 4.
Detection work can be facilitated and usability can be improved.

[Effect of idea]

As is clear from the above detailed explanation, this invention has a plurality of light guides that guide light from a light emitting part and irradiate it into the oil of the vehicle drive system equipment, and guide the light that has passed through the oil to the light receiving part. A fixed body, a light emitting part, and a light receiving part are provided with a wave body, a display part is provided to display the state of oil deterioration in response to a change in the light transmittance detected by the light receiving part, and the inlet end and the outlet end of the optical waveguide are assembled together. A switching detection mechanism having a movable body that is incorporated with a part and is rotatable relative to an end face of a fixed body, and a switching operation body that instructs to selectively detect an oil deterioration state of any of the equipment by rotating the movable body. A cord-connecting metal plate is provided on the movable body, and multiple position codes are installed on the fixed body to selectively connect to the cord-connecting metal plate, thereby correcting the relationship between the oil transmittance of the equipment and the degree of deterioration. By connecting each position code with an amplifier that outputs an electric signal to the display, it is possible to easily detect the deterioration state of the oil in each device, and also to adjust the permeability of the oil depending on the type of oil. By correcting the relationship between the deterioration rate and the deterioration rate, the oil deterioration state can be easily and accurately detected.
Oil can be replaced at a proper time, economical losses due to replacement of usable oil can be prevented, and damage to equipment due to the use of oil with a high degree of deterioration can be prevented. In addition, the oil deterioration state of each device can be detected by a pair of light emitting section and light receiving section, making it easy to detect oil deterioration of each device.
Usability can be improved. Furthermore, since the light emitting part and the light receiving part are connected by an optical waveguide, the light emitting part and the light receiving part can be installed away from the heating oil, which prevents the influence of heat and facilitates practical application. It can be achieved.

[Brief explanation of the drawing]

Figures 1 to 8 show an embodiment of this invention, Figure 1 is a perspective view of a vehicle chassis equipped with an oil deterioration detection device for each device, Figure 2 is a perspective view of the switching detection mechanism, and Figure 3 is switching detection. 4 is a front view of the end surface of the movable body of the mechanism, FIG. 4 is a sectional view taken along the - line in FIG. 3, FIG. 5 is a front view of the end surface of the fixed body of the switching detection mechanism, and FIG. 6 is a sectional view taken along the - line in FIG. 7 is a partially cutaway perspective view of the irradiation section, and FIG. 8 is a circuit diagram of the oil deterioration detection device. In the figure, 2 is a chassis, 4 is an internal combustion engine, 6 is a transmission, 10 is a differential, 12 is an oil deterioration detection device, 14 is a light emitting diode, 16 is a photodiode, 18 is a switching detection mechanism, and 20 is a first irradiation unit. ,2
2 is a second irradiation section, 24 is a third irradiation section, and 26 is a first irradiation section.
Optical waveguide, 28 is a second optical waveguide, 30 is a third optical waveguide, 32 is a movable body, 34 is a fixed body, 40 is a switching operation body, 56 is a cord connecting metal plate, 58 is a first position code , 60 is the second position code,
62 is a third position code, 64 is an amplifier, and 66 is a display section.

Claims (1)

[Claims for Utility Model Registration] 1. An oil deterioration detection device that has a light emitting part and a light receiving part and detects oil deterioration, which guides light from the light emitting part and irradiates it into the oil of vehicle drive system equipment. A plurality of optical waveguides are provided for guiding light that has passed through the oil to the light receiving section, a display section is provided that displays a state of oil deterioration in response to a change in light transmittance detected by the light receiving section, and the optical waveguide A fixed body in which the inlet end and the outlet end of the body are assembled together, a movable body in which the light emitting section and the light receiving section are incorporated and can be rotated with respect to the end face of the fixed body, and by rotating this movable body, the device a switching detection mechanism having a switching operation body for instructing selective detection of one of the oil deterioration states; the movable body is provided with a cord-connected metal plate; A plurality of position codes are provided to be connected to each of the position codes, and an amplifier is provided in communication with each of the position codes to correct the relationship between the light transmittance of the oil of the equipment and the degree of deterioration and output an electric signal to the display unit. An oil deterioration detection device characterized by: 2. The utility model registration according to claim 1, wherein the light waveguide is a light waveguide having a portion located in the oil and having an irradiation part that irradiates light from the light emitting part into the oil. Oil deterioration detection device.