JP2012136987A - Deterioration detection device and method of lubricating oil, and engine system equipped with deterioration detection device of lubricating oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deterioration detection device and a method of lubricating oil which can diagnose the deterioration of the lubricating oil at real time without stopping an internal combustion engine, and an engine system equipped with the deterioration detection device of the lubricating oil.SOLUTION: The deterioration detection device 50A comprises: an isolated-lubricating oil tank 51 which isolates a part of the lubricating oil 31 circulating in a circulation line Lof the lubricating oil 31 by using an isolation line L, and has an evaporation space 51a; an impurity removal line Lwhich brings the isolated-lubricating oil tank 51 into a sealed state, and after that, sucks and removes an exhaust gas component 52 by using a pump P; and a detection part 54 which brings the tank into the sealed state once again after removing the exhaust gas component 52, and detects a fuel-derived evaporated component 53 which is generated in the evaporation space 51a.

Description

  The present invention relates to a lubricating oil deterioration detection device and method, and an engine system including a lubricating oil deterioration detection device.

Maintaining the quality and purity of diesel engine lubricants is critical to maintaining engine durability.
By the way, in an engine that is an internal combustion engine using fossil fuel, the fuel may be mixed into the lubricating oil via a combustion chamber, piping, or the like.
In addition, the lubricating oil mixed with fuel has a problem in that, for example, deterioration of viscosity, sludge generation, and the like occur, and the original lubricating oil function cannot be performed.

  For this reason, it is required to diagnose the degree of deterioration of the lubricating oil through periodic replacement of the lubricating oil or periodic sampling inspection and to replace it as necessary. For this inspection, for example, there is a proposal of a float type detection device using a floating body having a predetermined specific gravity equal to or lower than that of the lubricating oil (Patent Document 1).

JP 2005-308563 A

By the way, in the case of stably replacing the lubricating oil, it is necessary to set the replacement interval to the safe side (shorter), and there is a problem that the amount of the lubricating oil used is increased correspondingly and the cost is increased.
In addition, when performing a sampling inspection regularly, there is a problem that it takes time for the analysis because the analysis is individually performed by the analyzer. As a result, it takes time until the analysis result is reflected in the lubricating oil replacement, operation restriction, etc. of the internal combustion engine, so that the original function of the lubricating oil cannot be performed and the probability of occurrence of a problem may increase.

  SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a lubricating oil deterioration detection device and method that enables real-time diagnosis of lubricating oil deterioration without stopping the internal combustion engine, and an engine system including the lubricating oil deterioration detection device. This is the issue.

  A first invention of the present invention for solving the above-described problem is a preparative lubricating oil tank in which a part of the lubricating oil is separated by a preparative line and the inside having a vaporization space can be sealed, The removal oil tank is sealed, and then the impurity removal line that sucks and removes exhaust gas components with a pump, and after the exhaust gas components are removed, it is sealed again, and then the fuel-derived vaporized components generated in the vaporization space are detected. And a detection unit for detecting deterioration of the lubricating oil.

  According to a second aspect of the present invention, in the first aspect of the invention, there is provided a deterioration detection device for lubricating oil, wherein the preparative lubricating oil tank has a heating means.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the detection unit is a detection tube that is filled with a detection reagent that changes color by reacting with the fuel-derived vaporization component and communicates with the vaporization space. It is in the deterioration detection device for lubricating oil.

  A fourth invention is the detection tube according to the first or second invention, wherein the detector is filled with a detection reagent that changes color by reacting with the fuel-derived vaporized component and communicates with the vaporization space. The present invention is directed to a lubricant deterioration detection device including a color sensor that measures the presence or absence of oil.

  According to a fifth invention, in the first or second invention, the detection unit is filled with a detection liquid that is changed in color by reacting with the fuel-derived vaporization component, and the detection liquid is in the vaporization space. There is provided a deterioration detection device for lubricating oil, comprising a color sensor that introduces a vaporized component derived from a generated fuel through an air diffuser and measures the presence or absence of discoloration of a detection reagent solution.

  In a sixth aspect of the present invention, a part of the lubricating oil is collected and stored in a preparative lubricating oil tank having a vaporization space, and then the preparative lubricating oil tank is sealed, and exhaust gas components are removed after sealing, Thereafter, there is provided a method for detecting deterioration of lubricating oil, characterized in that a detecting unit detects a vaporized component derived from fuel generated in a vaporizing space of a preparative lubricating oil tank.

  According to a seventh aspect of the invention, an engine, an oil pan for storing the lubricating oil of the engine, an oil filter that is interposed in the lubricating oil circulation line and purifies the lubricating oil, and a part of the lubricating oil is separated from the circulating line. Deterioration detection of lubricating oil, comprising: a preparative line; and a deterioration detection device for any one of the first to fifth lubricants for detecting a deterioration state of the lubricating oil separated by the preparative line. In the engine system with the device.

  According to the present invention, it is possible to diagnose the deterioration of the lubricating oil in real time without stopping the internal combustion engine.

FIG. 1 is an explanatory view schematically showing a diesel engine. FIG. 2 is an explanatory diagram schematically showing one cylinder. FIG. 3 is a schematic diagram of a lubricant deterioration detection apparatus according to the present invention. FIG. 4 is a relationship diagram between the fuel mixing rate and the color change region. FIG. 5 is a schematic view of an engine system provided with a lubricant deterioration detection device. FIG. 6 is an example of a flowchart for measuring the degree of dilution due to mixing of fuel in the lubricating oil according to the first embodiment and implementing the countermeasure. FIG. 7 is a schematic diagram of a lubricant deterioration detection apparatus according to the second embodiment. FIG. 8 is an enlarged view of the main part. FIG. 9 is a schematic diagram of an engine system including the lubricant deterioration detection device according to the second embodiment. FIG. 10 is a schematic diagram of a lubricant deterioration detection apparatus according to a third embodiment. FIG. 11 is a relationship diagram between the fuel mixing rate and the degree of discoloration.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

The embodiment will be described based on a diesel engine for navigation that is mounted on a ship.
FIG. 1 is an explanatory view schematically showing a marine diesel engine. FIG. 2 is an explanatory diagram schematically showing one cylinder.
As shown in FIG. 1, the diesel engine 10 of this embodiment includes one or more (9 in this embodiment) cylinders 20, a supercharger 11, an air cooler 12, and an exhaust collecting pipe 13. Including. First, a basic configuration of one cylinder 20 will be described with reference to FIG. In the following, a reciprocating type is described as an example of the cylinder 20, but the cylinder 20 may be a rotary type. As shown in FIG. 2, the cylinder 20 includes a cylinder 21, a piston 22, a crankshaft 23, a crank chamber 23a, a connecting rod 24, a cylinder head 25, a combustion chamber 25a, an intake port 26a, and an intake air. A valve 26, an exhaust port 27 a, an exhaust valve 27, an injector 28, and an oil pan 29 are included.

  The cylinder 21 is a cylindrical member. The piston 22 is provided in the hollow portion of the cylinder 21. The piston 22 is provided so that it can move in the direction of the central axis of the cylinder 21. The crankshaft 23 is provided in the crank chamber 23a so that it can rotate. The crank chamber 23 a is provided on one side of the cylinder 21 in the central axis direction. The crankshaft 23 converts the reciprocating motion of the piston 22 into rotational motion. The connecting rod 24 connects the piston 22 and the crankshaft 23.

  The cylinder head 25 is provided on the other side of the cylinder 21 in the central axis direction (the side opposite to the crank chamber 23a). The combustion chamber 25 a is a space surrounded by the piston 22 and the cylinder head 25.

  The intake port 26a and the exhaust port 27a communicate the outside of the cylinder 20 and the combustion chamber 25a. The intake valve 26 is provided in the intake port 26a. The intake valve 26 adjusts the flow of air between the outside of the cylinder 20 and the combustion chamber 25a via the intake port 26a. The exhaust valve 27 is provided in the exhaust port 27a. The exhaust valve 27 adjusts the flow of air between the outside of the cylinder 20 and the combustion chamber 25a via the exhaust port 27a.

  The fuel injection pump 32 pressurizes the emulsion fuel and guides the emulsion fuel to the injector 28. The injector 28 is provided, for example, with a jet port protruding in the combustion chamber 25a. The fuel injection pump 32 guides the emulsion fuel F guided from the fuel supply device 30 to the combustion chamber 25a. The emulsion fuel F is obtained by mixing water with fuel such as light oil or heavy oil. The fuel injection pump 32 may be provided with a jet port protruding from the intake port 26a. The oil pan 29 is provided in the crank chamber 23a. The oil pan 29 stores lubricating oil 31.

  The cylinder 20 configured as described above repeatedly performs one cycle of intake, compression, expansion, and exhaust. Thereby, in the cylinder 20, the piston 22 reciprocates and the crankshaft 23 rotates. The cylinder 20 may perform one cycle with four strokes or may perform one cycle with two strokes.

Returning to the description of the diesel engine 10.
The supercharger 11 pressurizes air. The supercharger 11 is a so-called turbocharger that pressurizes air by obtaining energy of exhaust gas discharged from the exhaust port 27a shown in FIG. The supercharger 11 may be a so-called supercharger that obtains the rotational force of the crankshaft 23 and pressurizes the air. The air cooler 12 cools the air guided from the supercharger 11. The exhaust collecting pipe 13 communicates with the exhaust port 27 a of each cylinder 20. In the present embodiment, the exhaust gas discharged from the exhaust port 27 a of each cylinder 20 is guided to the supercharger 11 via the exhaust collecting pipe 13.

  Here, the crankshaft 23 shown in FIG. 1 is a member common to the cylinders 20. With the above configuration, the diesel engine 10 rotates the crankshaft 23 when each cylinder 20 operates. In the present embodiment, the diesel engine 10 is described as including the supercharger 11, but the diesel engine 10 may not include the supercharger 11. That is, the diesel engine 10 may be a naturally aspirated internal combustion engine. In this case, the diesel engine 10 may not include the air cooler 12.

  Next, the apparatus and method for detecting deterioration of a diesel engine lubricant will be described in detail.

FIG. 3 is a schematic diagram of a lubricant deterioration detection apparatus according to the present invention.
As shown in FIG. 3, the deterioration detecting device 50A of the lubricating oil of the present example, up by some prep line L ₁ of the lubricating oil 31 to the circulation line L ₁₁ circulating the lubricating oil 31 min The preparative lubricating oil tank 51 having the vaporization space 51a and capable of sealing the inside, and the preparative lubricating oil tank 51 in a sealed state, and then the impurity removal line L _{2 for} sucking and removing the exhaust gas component 52 by the pump P ₁ are used. And a detection unit 54 for detecting the fuel-derived vaporized component 53 generated in the vaporization space 51a after the exhaust gas component 52 is removed and then sealed again under reduced pressure.

  In the present embodiment, the detection unit 54 uses a detection tube that is filled with a gas detection reagent that changes color by reacting with the fuel-derived vaporized component 53 and communicates with the vaporization space 51a.

The detection reagent filled in the gas detection tube may be any reagent as long as it is a reagent that reacts and changes color with a fuel-specific component (eg, aromatic hydrocarbon) that is a vaporization component. For example, iodine oxide (I ₂ O ₅ ) A powder or pellet-like reagent comprising sulfuric acid (H ₂ SO ₄ ) can be used.
Then, when the vaporized component is ventilated through the pellet reagent filled in the detection tube 54a, the length of the color changing region changes according to the aeration amount. It is visually determined whether or not the dilution ratio of the lubricating oil due to the fuel mixture exceeds the reference based on the determination criterion obtained in advance for the change in length.
FIG. 4 is a relationship diagram between the fuel mixing rate and the color change region. There is a correlation that when the degree of fuel mixing increases, the length of the discoloration region also increases.
The detection unit 54 can be replaced by a cartridge method. Here, as the cartridge type detection tube, for example, a detection tube for GASTECH "aromatic hydrocarbon" can be exemplified.
The used detection unit 54 is replaced with a new one to prepare for the next measurement.

  The preparative lubricating oil 31a dispensed in the preparative lubricating oil tank 51 is left in the vaporizing space 51a by being left for a predetermined time because the lubricating oil 31 in the oil pan 29 is about 70 to 80 ° C. Although the vaporization component 53 derived from the fuel is full, if necessary, a heating means may be provided to warm the preparative lubricating oil tank 51 to promote the vaporization of the vaporization component 53 derived from the fuel.

Next, an example in which the lubricant deterioration detection device 50A is applied to, for example, a marine diesel engine system will be described.
FIG. 5 is a schematic view of an engine system provided with a lubricant deterioration detection device.
As shown in FIG. 5, the engine system including the lubricant deterioration detection device is interposed in a diesel engine 10, an oil pan 29 for storing the lubricant oil of the diesel engine 10, and a circulation line L ₁₁ for the lubricant 31. , an oil filter 41 for purifying the lubricating oil 31, the prep line L ₁ to preparative portion of preparative lubricant 31a min lubricating oil 31 from the circulation line L _11, and collected by preparative line L ₁ min lubricating And a lubricant deterioration detection device 50A for detecting a deterioration state of the oil. In FIG. 5, reference numeral P ₂ illustrates a lubrication oil pump.

In such a system, part of the preparative lubricating oil 31a of the lubricating oil 31 is supplied to the valve V ₁ by the preparative line L ₁ branched from the circulation line L ₁₁ provided with the oil filter 41 from the oil pan 29 of the diesel engine 10. V ₂ is opened and fractionated, and the interior provided with the vaporization space 51 a is stored in a separable preparative lubricating oil tank 51, and the fuel-derived vaporized component 53 is detected by the detection unit 54.

First, the lubricating oil 31 is extracted from the oil pan 29 of the diesel engine 10 under the operating condition, and stored in a preparative lubricating oil tank (hereinafter referred to as “tank”) 51. Thereafter, the valve V ₃ interposed in the preparative line L ₁ is opened, and the inside of the tank 51 is once depressurized by the pump P ₁ to remove components (impurities) caused by exhaust gas such as blow-by gas. Thereafter, the valve V ₃ is closed.

Next, after leaving for a predetermined time, the fuel contained in the lubricating oil 31 is vaporized to generate a vaporized component 53 derived from the fuel.
Next, the valve V ₄ of the line L ₃ leading to the tank 51 and the detection unit 54 is opened, the pump P ₁ is sucked, and the vaporized component 53 derived from the fuel vaporized in the vaporization space 51 a is passed through the detection unit 54.

Next, the suction of the pump P ₁ is stopped, the valve V ₄ is closed, and left for a predetermined time (about several minutes). Thereby, when fuel is contained in the lubricating oil 31, discoloration proceeds due to reaction with the reagent of the detection unit 54.
Then, the length of the color change area of the detection unit 54 (whether the dilution level exceeds the reference) is visually determined.

If it is determined from the result of this diagnosis that the lubricating oil 31 needs to be replaced, the valves V ₅ and V ₆ leading to the new oil tank 24 and the waste oil tank (not shown) are opened and closed, and the oil pan 29 The lubricating oil 31 is replenished or replaced.
In addition, the operating conditions (for example, the rotational speed, etc.) may be adjusted while supplementing or replacing the lubricating oil, or instead.

In addition, the lubricating oil 31 in the tank 51 after the determination is completed opens the valve V ₂ interposed in the disposal line L ₄ and returns to the circulation line L ₁₁ .

  According to the present embodiment, it is possible to detect the fuel F mixed in the lubricating oil 31 by using only one inexpensive detection device with a simple configuration, and the cost of the analysis unit can be reduced.

  The analyzer can be shared by a plurality of internal combustion engines.

  A procedure for analyzing the state of dilution of fuel into lubricating oil during engine operation will be described. FIG. 6 is an example of a flowchart for measuring the degree of dilution due to mixing of fuel in the lubricating oil according to the first embodiment and implementing the countermeasure.

  First, it is determined whether or not the operating time has reached the regular inspection time (step ST1).

Next, when it is determined that the periodical inspection time has not been reached (tD: operation time <tT: periodical inspection period) (step ST1: No), this control is terminated, and the time is confirmed again.
On the other hand, when it is determined that the periodical inspection time has been reached (tD ≧ tT) (step ST1: Yes), the branch line valve is opened, and a portion of the preparative lubricating oil 31a of the lubricating oil 31 is collected (step). ST2).

  After separating the preparative lubricating oil 31a, exhaust gas-derived components are removed (step ST3).

  Next, the inside of the sorting tank 51 is sealed and allowed to stand, and the vaporized component 53 derived from the fuel contained in the lubricating oil 31 is filled in the vaporized space 51a (step ST4).

Thereafter, the fuel-derived vaporized component 53 vaporized in the vaporized space 51a is passed through the detector 54 by the pump P1 for a predetermined time. Next, the suction of the pump P ₁ is stopped, the valve V ₄ is closed, and left for a predetermined time (about several minutes) (step ST5).
Then, the length of the color change area of the detection unit 54 (whether the dilution level exceeds the reference) is visually determined (step ST6).

As a result of this determination, it is determined whether or not the discoloration area is equal to or greater than a threshold value (step ST7).
If it is determined to exceed the threshold by the determination (step ST7: Yes), by operating the valves V ₅ and V ₆ which communicates with the new oil tank and waste oil tank, replenishment or replacement operations of the lubricating oil 31 in the oil pan 29 Then, measures such as operation condition adjustment are performed (ST8).
At that time, the waste oil is stored in a waste oil tank (not shown) by operating the valve V ₆ .
If it is determined by the determination that the threshold value is not exceeded (step ST7: No), the process ends and waits until the inspection time again.

  As described above, according to the present invention, it is possible to quickly confirm that there is deterioration of the lubricating oil during the operation of the engine, and immediately reflect the replenishment or replacement of the lubricating oil 31 according to the degree of the deterioration.

Since the detection reagent is an inexpensive reagent, the cost required for management of the lubricating oil 31 can be reduced.
In addition, components (impurities) derived from exhaust gas such as blow-by gas mixed in the lubricating oil are included in the oil pan 29 to be removed by deaeration operation of the lubricating oil 31 before notifying the detector 54. No interference from exhaust gas components.

  According to this embodiment, it is possible to diagnose the deterioration of the lubricating oil in real time without stopping the internal combustion engine, and it is possible to quickly limit the operation and to prevent troubles by reflecting the change in the lubricating oil. It becomes possible to do.

  In addition, since the configuration of the lubricant deterioration detection device is simple, inexpensive and stable lubricant management is possible.

Next, Example 2 will be described.
FIG. 7 is a schematic diagram of a lubricant deterioration detection apparatus according to the second embodiment. FIG. 8 is an enlarged view of the main part. FIG. 9 is a schematic diagram of an engine system including the lubricant deterioration detection device according to the second embodiment.
In addition, the same code | symbol is attached | subjected to the same member as the structural member of the deterioration detection apparatus of the lubricating oil which concerns on Example 1 shown in FIG. 3, and the description is abbreviate | omitted.
As shown in FIG. 7, in the lubricant deterioration detection device 50B according to the present embodiment, the detection unit 54 in the lubricant deterioration detection device 50A according to the first embodiment reacts with the fuel-derived vaporized component. In addition to a detection tube that is filled with a detection reagent 54b that changes color and communicates with the vaporization space 51a, a color sensor 60 that measures the presence or absence of the color change is provided.

  In this embodiment, since the length of the color change region of the reagent that changes color is measured by the color sensor 60, it is possible to make continuous judgment day and night.

  The determination is made by setting a threshold value (color change gamut length) in the detection unit 54 and determining whether or not the threshold value has been reached. Further, a plurality of threshold values (for example, level No. 1, level No. 2...) May be set, and the determination may be given superiority or inferiority, and the control in the control unit may be changed according to the threshold values. In this case, the color sensor 60 is operated up and down in the length direction of the detection unit 54 so that the color change position can be detected.

  Note that the measurement procedure is different only in determining whether or not the threshold value set in advance by the color sensor 60 has been reached, and the other procedures are the same as those in the first embodiment, and will be omitted.

  Here, as the color sensor 60, as shown in FIG. 8, for example, a known color sensor including a light projecting fiber 61 for a light source and a light receiving fiber 63 including a light receiving element 62 for receiving light is used. That's fine. In FIG. 8, reference numeral 64 denotes a light projecting lens, and 65 denotes a light receiving lens.

FIG. 9 is a schematic view of an engine system provided with a lubricant deterioration detection device.
As shown in FIG. 9, the engine system including a deterioration detecting apparatus 50B of the lubricating oil, interposed diesel engine 10, an oil pan 29 for storing lubricating oil 31 of the diesel engine 10, the circulation line L ₁₁ of the lubricating oil It is, an oil filter 41 for purifying the lubricating oil 31, the prep line L ₁ to preparative portion of preparative lubricant 31a min lubricating oil 31 from the circulation line L _11, and collected by preparative line L ₁ min And a lubricant deterioration detecting device 50B for detecting a lubricant deterioration state.

In such a system, part of the preparative lubricating oil 31a of the lubricating oil 31 is supplied to the valve V ₁ by the preparative line L ₁ branched from the circulation line L ₁₁ provided with the oil filter 41 from the oil pan 29 of the diesel engine 10. And V ₂ is opened for separation, the inside of the vaporization space 51 a is stored in a sealable preparative lubricating oil tank 51, and the detection unit 54 is detected by the color sensor 60.

  The result measured by the color sensor 60 can be immediately reflected in the engine operation limit or the lubricating oil replacement through the control unit 67 after the information processing (degradation determination) by the signal processing unit 66.

  According to the present embodiment, the determination of the dilution ratio of the lubricating oil due to fuel mixing can be automatically detected, and monitoring can be performed day and night.

Next, Example 3 will be described. FIG. 10 is a schematic diagram of a lubricant deterioration detection apparatus according to a third embodiment. In addition, the same code | symbol is attached | subjected to the same member as the structural member of the deterioration detection apparatus of the lubricating oil which concerns on Example 1 and 2 shown in FIG.3 and 7, and the description is abbreviate | omitted.
As shown in FIG. 10, the lubricant deterioration detection device 50C according to the present embodiment reacts with the fuel-derived vaporized component 53 and changes color as a detection unit in the lubricant deterioration detection device 50B according to the second embodiment. The detection liquid tank 72 filled with the detection liquid 71 is provided, and the vaporized component 53 derived from the fuel generated in the vaporization space 51a is introduced into the detection liquid 71 through the diffuser pipe 73. Presence / absence is measured by the color sensor 60. In the drawing, the symbol P ₃ illustrates a pump for sending the fuel-derived vaporized component 53 to the detection liquid tank 72.

The detection reagent used for the detection liquid 71 may be any reagent as long as it is a reagent that reacts with and discolors a fuel-specific component (eg, aromatic hydrocarbon) that is a vaporization component. For example, iodine oxide (I ₂ O ₅ ) And a reagent composed of sulfuric acid (H ₂ SO ₄ ) can be used.
Then, the detection reagent is dissolved in a solvent to form a detection liquid 71, and the fuel-derived vaporized component 53 generated in the vaporization space 51 a is introduced into the detection liquid 71 through the diffuser tube 73, and the fuel-derived vaporized component. The degree of discoloration changes according to the amount of 53. A threshold value is provided for the degree of discoloration, and the color sensor 60 determines whether or not the dilution ratio of the lubricating oil due to fuel mixing exceeds the reference. A plurality of threshold values serving as determination criteria may be set according to the degree of dilution, and the control in the control unit may be changed.
In addition, after replacing the used detection liquid, it prepares for the next measurement.

  FIG. 11 is a relationship diagram between the fuel mixing rate and the degree of discoloration. There is a correlation that the degree of discoloration increases as the degree of fuel mixing increases.

  Note that the measurement procedure is different only in determining whether or not the threshold value set in advance by the color sensor 60 has been reached, and the other procedures are the same as those in the first embodiment, and will be omitted.

  According to the present embodiment, the result of measuring the degree of discoloration of the detection liquid 71 by the color sensor 60 is subjected to information processing (determination determination) by the signal processing unit 66, and then immediately through the control unit 67 for engine operation restriction or lubricating oil replacement. Can be reflected.

  According to the present embodiment, the determination of the dilution ratio of the lubricating oil due to fuel mixing can be automatically detected, and monitoring can be performed day and night.

  In each of the above-described embodiments, the description has been made by applying to a diesel engine that is mounted on a ship and used for navigation, but may be applied to all diesel engines such as for power generation.

DESCRIPTION OF SYMBOLS 10 Diesel engine 20 cylinder 31 Lubricating oil 50A-50C Lubricating oil deterioration detection apparatus 51a Vaporization space 51 Preparative lubricating oil tank 52 Exhaust gas component 53 Fuel-derived vaporizing component 54 Detection part 60 Color sensor

Claims (7)

A preparative lubricating oil tank in which a part of the lubricating oil is separated by a preparative line and the inside having a vaporization space can be sealed;
Impurity removal line that seals the preparative lubricating oil tank and then sucks and removes exhaust gas components by a pump;
And a detection unit for detecting a fuel-derived vaporized component generated in the vaporized space after removing the exhaust gas component, and detecting the deterioration of the lubricating oil. In claim 1,
An apparatus for detecting deterioration of lubricating oil, wherein the preparative lubricating oil tank has a heating means. In claim 1 or 2,
Lubricating oil characterized in that the detection unit is a detection tube filled in a detection tube communicating with the vaporization space, filled with a detection reagent that changes color by reacting with the vaporization component derived from the fuel, and communicating with the vaporization space Deterioration detection device. In claim 1 or 2,
The detection unit is a detection tube that is filled with a detection reagent that changes color by reacting with the fuel-derived vaporized component and communicates with the vaporization space, and includes a color sensor that measures the presence or absence of the color change. Lubricant deterioration detector. In claim 1 or 2,
The detection unit is
A reagent tank filled with a detection liquid that reacts with the vaporized component derived from the fuel and changes color;
An apparatus for detecting deterioration of a lubricating oil, comprising: a color sensor that introduces a vapor component derived from fuel generated in the vaporization space into the detection liquid through an air diffuser and measures the presence or absence of discoloration of the detection reagent solution. Part of the lubricating oil is collected and stored in a preparative lubricating oil tank with a vaporization space.
Next, the preparative lubricating oil tank is sealed, and after sealing, exhaust gas components are removed,
Then, the deterioration detection method of the lubricating oil characterized by detecting the vaporization component derived from the fuel which generate | occur | produced in the vaporization space of a preparative lubricating oil tank in a detection part. Engine,
An oil pan for storing engine lubricating oil;
An oil filter that is interposed in the lubricating oil circulation line and purifies the lubricating oil;
A fractionation line for fractionating lubricant from the circulation line;
A deterioration detection device for lubricating oil, comprising: a deterioration detection device for lubricating oil according to any one of claims 1 to 5, wherein the deterioration detection device detects a deterioration state of the lubricating oil separated by a preparative line. Engine system.

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