JP5558337B2 - Lubricant replenisher for engine - Google Patents

Description

  In particular, the present invention relates to a lubricating oil replenishing device that replenishes the engine with lubricating oil in accordance with a change in properties of the lubricating oil in a diesel engine that uses heavy oil as fuel.

  For example, heavy oil is mainly used as a fuel in a diesel engine applied to a ship. The heavy oil used in this diesel engine is left after high-quality oil such as light oil has been refined during the oil refining process. In recent years, with the progress of this oil refining process, C heavy oil close to petroleum residue is taken out and used as fuel. However, this heavy fuel oil C is a particularly dense fuel oil, and when used as a diesel engine fuel, the combustibility varies. When the combustibility of the fuel deteriorates, the lubricating oil deteriorates. End up.

  Generally, a diesel engine is provided with an oil passage for supplying oil as a lubricating oil to a rotating part and a sliding part, and oil stored in an oil pan is supplied to each rotating part and each sliding part by a pump. By circulating supply, wear of each part is prevented and smooth operation is ensured. Conventionally, the property management of oil used in diesel engines has relied on chemical analysis, but since it takes a long time to obtain the chemical analysis results after sampling the oil, the property management of the oil is time consuming. It is hard to say that it is Lee.

  An example of measuring the properties of oil used in an engine is described in Patent Document 1 below. This oil deterioration detection device described in Patent Document 1 has two electrode plates installed in parallel with each other in an oil flow path, and the current flowing when an AC voltage is applied between the two electrode plates is measured by an ammeter. The signal processing unit measures the voltage between the plates with a voltmeter, and determines the oil conductivity and dielectric constant based on the measurement results of the ammeter and voltmeter to determine the deterioration of the oil. is there.

JP 2009-002693 A

  Although the above-described conventional oil deterioration detection device can perform a more appropriate oil deterioration determination, in order to protect the engine from oil deterioration, it is necessary to supply high-quality oil.

  The present invention solves the above-described problems, and an object of the present invention is to provide a lubricating oil replenishing device in an engine that can supply an appropriate lubricating oil according to the degree of deterioration of the lubricating oil.

  In order to achieve the above object, a lubricating oil replenishing device in an engine according to the present invention includes a first lubricating oil reservoir, and lubrication capable of supplying the lubricating oil in the first lubricating oil reservoir to a lubricating oil supply in the engine. An oil supply passage, a lubricant supply pump provided in the lubricant supply passage, a lubricant return passage for returning the lubricant supplied to the lubricant supply portion to the first lubricant storage portion, and a high-quality lubricant Of the second lubricating oil reservoir, the first lubricating oil replenishing device capable of replenishing the first lubricating oil reservoir with the lubricating oil of the second lubricating oil reservoir, and the second lubricating oil reservoir A second lubricating oil replenishing device capable of replenishing lubricating oil upstream of the lubricating oil supply pump in the lubricating oil supply passage; a lubricating oil property determining sensor for determining a degree of deterioration of the lubricating oil flowing through the lubricating oil return passage; The lubricating oil judged by the lubricating oil property judging sensor The first lubricating oil replenishing device is operated when the degree of deterioration is equal to or lower than the first determination value, while the second lubricating oil replenishing device is operated when the degree of deterioration of the lubricating oil is equal to or lower than a second determination value lower than the first determination value. And a lubricating oil replenishment passage selection device that operates.

  Accordingly, when the degree of deterioration of the lubricating oil returning from the lubricating oil supply unit is small, the first lubricating oil storage unit is supplemented with good quality lubricating oil, while when the degree of deterioration of the lubricating oil returning from the lubricating oil supplying unit is large, the quality is good. Lubricating oil is replenished to the lubricating oil supply passage. That is, when the degree of deterioration of the lubricating oil returning from the lubricating oil supply unit is large, supplying a good quality lubricating oil from the lubricating oil supply passage to the lubricating oil supply unit without mixing with the lubricating oil in the first lubricating oil storage unit; Become. Therefore, good quality lubricating oil is directly supplied to the lubricating oil supply unit in which an event that greatly deteriorates the lubricating oil occurs, and the soundness of the operation in the lubricating oil supply unit can be maintained.

  In the lubricating oil replenishing device in the engine of the present invention, the lubricating oil replenishment passage selecting device calculates a change rate of the deterioration determination value by the lubricating oil property determination sensor, and the current change rate is larger than a preset threshold value. And operating the second lubricating oil replenishing device.

  Accordingly, when the quality of the lubricating oil returning from the lubricating oil supply unit is greatly deteriorated, a good quality lubricating oil is supplied to the lubricating oil supply unit without being mixed with the lubricating oil in the first lubricating oil storage unit. The soundness of the operation in the supply unit can be maintained.

  In the lubricating oil replenishing device in the engine according to the present invention, a lubricating oil discharging device for discharging the lubricating oil in the first lubricating oil reservoir is provided, and the lubricating oil replenishing passage selecting device is the first lubricating oil replenishing device or the The lubricating oil discharging device is activated when the second lubricating oil replenishing device is activated.

  Therefore, replenishing the lubricating oil increases the total amount of lubricating oil circulating in the engine. However, by discharging an appropriate amount of lubricating oil in the first lubricating oil reservoir, it is possible to prevent the lubricating oil from overflowing. it can.

  In the lubricating oil replenishing device in the engine of the present invention, the lubricating oil discharging device that discharges the lubricating oil in the first lubricating oil reservoir, and the first lubrication that detects the amount of lubricating oil stored in the first lubricating oil reservoir. An oil storage amount detection sensor is provided, and the lubricating oil replenishment passage selection device operates the lubricating oil discharge device based on a detection result of the first lubricating oil storage amount detection sensor.

  Therefore, although the total amount of lubricating oil circulating in the engine increases, the first lubricating oil is discharged by discharging the lubricating oil in the first lubricating oil reservoir in accordance with the amount of lubricating oil stored in the first lubricating oil reservoir. The amount of lubricating oil stored in the oil storing portion can be maintained at an appropriate amount.

  In the lubricating oil replenishment device for an engine according to the present invention, a second lubricating oil storage amount detection sensor for detecting a storage amount of the lubricating oil in the second lubricating oil storage portion is provided, and the lubricating oil replenishment passage selection device includes the first lubricating oil storage passage detection device. (2) An alarm is activated based on the detection result of the lubricant storage amount detection sensor.

  Accordingly, since the amount of lubricating oil stored in the second lubricating oil reservoir decreases by replenishing the first lubricating oil reservoir and the lubricating oil supply passage with good quality lubricating oil, the lubricating oil is stored in the second lubricating oil reservoir. When the amount falls below a predetermined amount, an alarm is activated, so that the second lubricating oil reservoir can be replenished with good quality lubricating oil and can always be replenished with good quality lubricating oil.

  In the lubricating oil replenishing device in the engine of the present invention, there is provided a third lubricating oil replenishing device capable of directly supplying the lubricating oil in the second lubricating oil storage unit to the lubricating oil supplying unit, The third lubricating oil replenishing device is operated when the degree of deterioration of the lubricating oil determined by the lubricating oil property determining sensor is equal to or lower than a third determination value lower than the second determination value.

  Therefore, when the quality of the lubricating oil returning from the lubricating oil supply section is significantly deteriorated, the high quality lubricating oil is supplied to the lubricating oil supply section at an early stage by supplying the high quality lubricating oil directly to the lubricating oil supply section. And the soundness of the operation at the lubricating oil supply unit can be maintained.

  According to the lubricating oil replenishing device in the engine of the present invention, when the deterioration degree of the lubricating oil returning from the lubricating oil supply unit is small, the first lubricating oil storage unit is replenished with good quality lubricating oil, while the lubricating oil supplying unit When the degree of deterioration of the returning lubricating oil is large, the lubricating oil supply passage is supplemented with good quality lubricating oil, so that it is possible to supply an appropriate lubricating oil according to the degree of deterioration of the lubricating oil.

FIG. 1 is a schematic configuration diagram of a lubricating oil replenishing device in an engine according to Embodiment 1 of the present invention. FIG. 2 is a flowchart showing oil supply control by the lubricating oil replenishing device in the engine of the first embodiment. FIG. 3 is a graph showing the oil supply timing with respect to the degree of oil deterioration. FIG. 4 is a schematic configuration diagram of a lubricating oil replenishing device in an engine according to Embodiment 2 of the present invention. FIG. 5 is a schematic configuration diagram of a lubricating oil replenishing device in an engine according to Embodiment 3 of the present invention. FIG. 6 is a flowchart showing oil supply control by the lubricating oil replenishing device in the engine of the third embodiment. FIG. 7 is a schematic configuration diagram of a lubricating oil replenishing device in an engine according to Embodiment 4 of the present invention.

  Exemplary embodiments of a lubricating oil replenishing device in an engine according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

  FIG. 1 is a schematic configuration diagram of a lubricating oil replenishing device in an engine according to Embodiment 1 of the present invention, FIG. 2 is a flowchart showing oil supply control by the lubricating oil replenishing device in the engine of Embodiment 1, and FIG. It is a graph showing the oil supply time with respect to the deterioration degree of oil.

  The diesel engine of Example 1 is mounted on a ship and used for navigation, and uses heavy oil as fuel. In the first embodiment, as illustrated in FIG. 1, the diesel engine 11 includes, for example, three oil supply units (lubricating oil supply units) 12, 13, and 14.

  Although not shown, the diesel engine 11 has pistons supported by a plurality of cylinder bores so as to be vertically movable, and a combustion chamber is defined by an engine body and a top surface of the piston. The combustion chamber has an intake port and an exhaust port communicating with each other at the top, and can be opened and closed by an intake valve and an exhaust valve operated by a camshaft. Further, a high pressure injector capable of injecting high pressure fuel is provided in the combustion chamber. In such a diesel engine 11, an oil supply to supply lubricating oil (oil) as a rotating part or sliding part such as a camshaft, a piston, an intake valve and an exhaust valve, a crankshaft or the like to prevent wear or heat generation. Parts 12, 13, and 14 are set.

  In the diesel engine 11, an oil pan (first lubricating oil reservoir) 21 capable of storing a predetermined amount of oil is disposed below the diesel engine 11. The oil pan 21 can be filled with predetermined oil from an inlet (not shown). The oil supply passage (lubricating oil supply passage) 22 has a base end portion connected to the oil pan 21, while a tip end portion is branched, and the branch passages 22 a, 22 b, 22 c are connected to the oil supply portions 12, 13, 14. It is connected. An oil pump (lubricating oil supply pump) 23 and an oil filter 24 are mounted on the oil pan 21 side of the oil supply passage 22, and oil stored in the oil pan 21 is passed through the oil supply passage 22 by the oil pump 23. It can supply to each oil supply part 12,13,14.

  The oil return passage (lubricating oil return passage) 25 has a base end portion connected to each of the oil supply portions 12, 13, and 14, and a tip end portion connected to the oil pan 21. The oil return passage 25 is a passage through which excess oil is recovered by free fall after being supplied from the oil supply passage 22 to each of the oil supply sections 12, 13, and 14.

  The diesel engine 11 is disposed below the oil pan 21 and adjacent to the oil pan 21 is an oil tank (second lubricating oil reservoir) 26 that can store high-quality oil such as new oil. The oil tank 26 can be filled with high-quality oil from an unillustrated inlet. The oil replenishing passage 27 has a base end portion connected to the oil tank 26 and a tip portion branched into two, and the first oil replenishing passage 28 is connected to the oil pan 21, while the second oil replenishing passage 29 is oiled. The supply passage 22 is connected to the upstream side (oil pan 21 side) of the oil pump 23. The oil replenishing passage 27 is provided with an oil pump 30 at a branch portion, and flow rate adjusting valves 31 and 32 are attached to a first oil replenishing passage 28 and a second oil replenishing passage 29, respectively.

  Accordingly, when the oil pump 30 is operated, the first flow rate adjustment valve 31 is opened, and the second flow rate adjustment valve 32 is closed, the high quality oil stored in the oil tank 26 is supplied to the oil replenishment passage 27 and the first oil replenishment. The oil pan 21 can be replenished from the passage 28. On the other hand, when the first flow rate adjustment valve 31 is closed and the second flow rate adjustment valve 32 is opened, good quality oil stored in the oil tank 26 is supplied from the oil supply passage 27 and the second oil supply passage 29 to the oil supply passage 22. Can be replenished.

  Here, the oil replenishing passage 27, the first oil replenishing passage 28, the oil pump 30, and the first flow rate adjusting valve 31 constitute the first lubricating oil replenishing device of the present invention. The passage 29, the oil pump 30, and the second flow rate adjustment valve 32 constitute the second lubricating oil replenishing device of the present invention.

  The deteriorated oil tank 33 is located below the oil pan 21, and an oil discharge passage 34 is provided from the bottom of the oil pan 21 toward the deteriorated oil tank 33, and a third flow rate adjustment valve 35 is attached to the oil discharge passage 34. Has been. Therefore, the oil in the oil pan 21 can be discharged from the oil discharge passage 34 to the deteriorated oil tank 33 by opening the third flow rate adjustment valve 35. Here, the deteriorated oil tank 33, the oil discharge passage 34, and the third flow rate adjusting valve 35 function as the lubricating oil discharge device of the present invention.

  The first oil property determining sensor (lubricating oil property determining sensor) 41 is disposed in the oil pan 21, and the second oil property determining sensor (lubricating oil property determining sensor) 42 is disposed in the oil return passage 25. The oil property determination sensors 41 and 42 determine the degree of deterioration of the oil. For example, two electrode plates are installed in the oil pan 21 or the oil return passage 25 in parallel with each other. The current and voltage that flow when an AC voltage is applied between the plates are measured, and the conductivity and dielectric constant of the oil are determined based on the measured current and voltage to determine the deterioration of the oil. The oil property determination sensors 41 and 42 are not limited to this type.

  The first oil level sensor (first lubricating oil storage amount detection sensor) 43 detects the amount of oil stored in the oil pan 21. For example, the amount of oil stored depends on the position of the flow floating in the oil. Is detected. The first oil level sensor 43 is not limited to this type.

  The control device 44 receives the detection results of the oil property determination sensors 41 and 42 and the detection result of the first oil level sensor 43. The control device 44 can adjust the opening degree of the first flow rate adjustment valve 31, the second flow rate adjustment valve 32, and the third flow rate adjustment valve 35, and can drive and control the oil pump 30. The oil pump 23 operates in synchronization with the diesel engine 11.

  In the diesel engine 11 of the first embodiment configured as described above, the control device 44 as the lubricating oil replenishment passage selection device has the degree of oil deterioration determined by the oil property determination sensors 41 and 42 equal to or less than the first determination value. At times, the oil pump 30 is operated and the flow rate adjusting valves 31 and 32 are controlled to be opened and closed so that good quality oil in the oil tank 26 is replenished to the oil pan 21 from the first oil replenishment passage 28. On the other hand, when the degree of deterioration of the oil is equal to or lower than the second determination value lower than the first determination value, the oil is supplied so that good quality oil in the oil tank 26 is replenished from the second oil replenishment passage 29 to the oil supply passage 22. The pump 30 is operated and the flow rate adjusting valves 31 and 32 are controlled to open and close.

  In this case, the oil property determination sensors 41 and 42 output a lower deterioration determination value as the degree of oil deterioration increases, and the control device 44 changes the deterioration determination values of the oil property determination sensors 41 and 42. When the rate of change of the current deterioration judgment value is greater than a preset threshold value, good quality oil in the oil tank 26 is replenished from the second oil replenishment passage 29 to the oil supply passage 22. Yes.

  Further, the control device 44 releases the oil in the oil pan 21 by opening the third flow rate adjusting valve 35 when good quality oil in the oil tank 26 is replenished to the oil pan 21 and the oil supply passage 22. The oil is discharged from the passage 34 to the deteriorated oil tank 33. In this case, the control device 44 adjusts the opening of the third flow rate adjustment valve 35 based on the detection result of the oil level sensor 43 so that the amount of oil stored in the oil pan 21 becomes an appropriate amount.

  Here, the effect | action of the lubricating oil replenishment apparatus in the diesel engine 11 of Example 1 is demonstrated based on the flowchart of FIG.

  In the lubricating oil replenishing device in the diesel engine 11 of the first embodiment, as shown in FIG. 2, in step S11, the control device 44 checks the output of the oil property determination sensors 41 and 42, that is, the deterioration determination value. . In step S12, control device 44 determines whether or not the deterioration determination value is equal to or less than the first determination value. Here, if it is determined that the oil deterioration determination value is not equal to or less than the first determination value, in step S20, the routine is exited with the valves (respective flow rate adjusting valves) 31 and 32 being closed.

  On the other hand, if it is determined in step S12 that the oil deterioration determination value is equal to or less than the first determination value, in step S13, the control device 44 causes the deterioration determination values by the oil property determination sensors 41 and 42 to rapidly decrease. Whether the deterioration determination value is equal to or smaller than the second determination value is determined. If it is determined that the oil deterioration determination value is not equal to or less than the second determination value, the oil pump 30 is activated and the normal valve, that is, the first flow rate adjustment valve 31 is opened in step S14. Then, good quality oil stored in the oil tank 26 is replenished to the oil pan 21 through the oil replenishment passage 27 and the first oil replenishment passage 28.

  On the other hand, if it is determined that the oil deterioration determination value is equal to or less than the second determination value, the oil pump 30 is activated and the emergency valve, that is, the second flow rate adjustment valve 32 is opened in step S15. High quality oil stored in the oil tank 26 is replenished to the oil supply passage 22 through the oil replenishment passage 27 and the second oil replenishment passage 29.

  In steps S12 and S13, the oil deterioration determination values by the oil property determination sensors 41 and 42 are compared with the first determination value and the second determination value. The oil deterioration determination values by the oil property determination sensors 41 and 42 are compared. The value may be an average value of the two outputs, or may be an output from the second oil property determination sensor 42. Further, the deterioration determination value and the first determination value in step S12 are output from the oil property determination sensors 41 and 42, and the deterioration determination value and the second determination value in step S13 are predetermined values in the output of the oil property determination sensors 41 and 42. It is desirable to use the amount of change per period, that is, the rate of change.

  That is, as shown in FIG. 3, when the oil gradually deteriorates and the outputs of the oil property determination sensors 41 and 42 decrease and become lower than the deterioration lower limit level (first determination value = output) A1 at time t2, Here, good quality oil is supplied to the oil pan 21, and the outputs of the oil property determination sensors 41 and 42 gradually increase. At this time, since the amount of change in the output of the oil property determination sensors 41 and 42 is not less than or equal to the second determination value (change rate), good quality oil is supplied to the oil pan 21.

  In addition, the oil gradually deteriorates and the output of the oil property determination sensors 41 and 42 decreases. At time t1, the oil property determination sensor 41 falls below the deterioration lower limit level (first determination value = output) A1. , 42 is equal to or less than the second determination value, so that high-quality oil is supplied to the oil supply passage 22 and the outputs of the oil property determination sensors 41, 42 rapidly increase. When the deterioration upper limit level A2 is set and the outputs of the oil property determination sensors 41 and 42 exceed the deterioration upper limit level A2, the above control is terminated, and hysteresis is set here.

  In other words, when the oil is gradually deteriorated, the oil pan 21 is supplemented with good quality oil to suppress the degree of deterioration, and when the oil is rapidly deteriorated, the good quality oil is directly deteriorated. The oil supply units 12, 13, and 14 are replenished to maintain the soundness of the oil supply units 12, 13, and 14.

  Returning to FIG. 2, in step S <b> 16, the control device 44 checks the output of the first oil level sensor 43, and in step S <b> 17, the control device 44 determines the oil pan 21 based on the detection result of the oil level sensor 43. It is determined whether or not the amount of oil is excessive. If the amount of oil stored in the oil pan 21 is larger than the appropriate amount, the waste oil valve, that is, the third flow rate adjustment valve 35 is opened in step S18, and the oil in the oil pan 21 is discharged from the oil discharge passage 34. Discharge into the deteriorated oil tank 33. On the other hand, if the amount of oil stored in the oil pan 21 is less than the appropriate amount, the waste oil valve, that is, the third flow rate adjustment valve 35 is closed in step S19.

  Thus, in the lubricating oil replenishing device in the engine of the first embodiment, the oil in the oil pan 21 can be supplied from the oil supply passage 22 to the oil supply portions 12, 13, and 14 by the oil pump 23. The oil supplied to the oil supply units 12, 13 and 14 can be discharged to the oil pan 21 through the oil return passage 25, and good quality oil in the oil tank 26 can be supplied to the oil pan 21 from the first oil replenishment passage 28. On the other hand, good quality oil in the oil tank 26 can be replenished from the second oil replenishment passage 29 to the oil supply passage 22, and the controller 44 determines that the deterioration judgment values of the oil property judgment sensors 41 and 42 are lower than the first judgment value. When the deterioration judgment value is equal to or lower than the second judgment value, the good quality oil is supplied to the oil pan 21 at the time of replenishment. It has been recruited to 22.

  Therefore, when the degree of deterioration of the oil returning from the oil supply units 12, 13, and 14 is small, the oil pan 21 is supplemented with good quality oil, while when the degree of deterioration of the oil returning from the oil supply units 12, 13, and 14 is large, The oil supply passage 22 is supplemented with good quality oil. That is, when the degree of deterioration of the oil returning from the oil supply units 12, 13, and 14 is large, good quality oil is not mixed with the oil in the oil pan 21 and supplied from the oil supply passage 22 to the oil supply units 12, 13, and 14. Will be. For this reason, high quality oil is directly supplied to the oil supply units 12, 13, and 14 in which an event that greatly deteriorates the oil occurs, and the soundness of the operation in the oil supply units 12, 13, and 14 is maintained. can do.

  Further, in the lubricating oil replenishing device in the engine of the first embodiment, the control device 44 calculates the change rate of the deterioration determination value by the oil property determination sensors 41 and 42, and the second determination in which the current change rate is set in advance. When the value is larger than the value, the oil supply passage 22 is replenished with good quality oil. Therefore, when the properties of the oil returning from the oil supply units 12, 13, and 14 are greatly deteriorated, good quality oil is supplied to the oil supply units 12, 13, and 14 without being mixed with the oil in the oil pan 21, The soundness of the operation in the oil supply units 12, 13, and 14 can be maintained.

  Further, in the lubricating oil replenishing device in the engine of the first embodiment, a deteriorated oil tank 33 for discharging the oil in the oil pan 21 is provided, and the control device 44 is configured to supply oil to the oil pan 21 or the oil supply passage 22. In addition, the oil in the oil pan 21 is discharged to the deteriorated oil tank 33. Accordingly, replenishing oil increases the total amount of oil circulating in the diesel engine 11, but when oil is replenished to the oil pan 21 or the oil supply passage 22, the oil in the oil pan 21 is deteriorated to the deteriorated oil tank 33. By discharging the oil into the oil pan, the oil overflow in the oil pan 21 can be prevented.

  Further, in the lubricating oil replenishing device in the engine of the first embodiment, the oil pan 21 is provided with the first oil level sensor 43, and the control device 44 deteriorates from the oil pan 21 based on the detection result of the first oil level sensor 43. The amount of oil discharged to the oil tank 33 is controlled. Therefore, although the total amount of oil circulating in the diesel engine 11 increases, the amount of oil in the oil pan 21 is controlled by controlling the amount of oil discharged to the deteriorated oil tank 33 according to the amount of oil stored in the oil pan 21. The storage amount can be maintained at an appropriate amount.

  FIG. 4 is a schematic configuration diagram of a lubricating oil replenishing device in an engine according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In the second embodiment, as shown in FIG. 4, the diesel engine 11 includes three oil supply units 12, 13, and 14, and an oil pan 21 is disposed below the three oil supply units 12, 13, and 14. The oil supply portions 12, 13, and 14 are connected to the oil supply portions 12, 13, and 14 through the passage 22 and the branch passages 22a, 22b, and 22c, and are connected to the oil supply portions 12, 13, and 14 through the oil return passage 25. An oil pump 23 and an oil filter 24 are attached to the oil supply passage 22.

  In addition, the diesel engine 11 is disposed below the oil pan 21 and adjacent to the oil pan 21. An oil tank 26 capable of storing high-quality oil is disposed, and the oil pan is passed through the oil supplement passage 27 and the first oil supplement passage 28. 21, and is connected to the oil supply passage 22 through the oil supplement passage 27 and the second oil supplement passage 29. The oil replenishing passage 27 is provided with an oil pump 30 at a branch portion, and flow rate adjusting valves 31 and 32 are attached to a first oil replenishing passage 28 and a second oil replenishing passage 29, respectively.

  The oil pan 21 is integrally formed with a replenishment oil tank 51 at a lower portion, and can be communicated by an on-off valve 52. The replenishing oil tank 51 is filled with high-quality oil, and normally, the on-off valve 52 is closed and the oil pan 21 and the replenishing oil tank 51 are separated.

  The deteriorated oil tank 33 is located below the replenishment oil tank 51, and an oil discharge passage 34 is provided from the bottom of the replenishment oil tank 51 toward the deteriorated oil tank 33, and a third flow rate adjustment valve 35 is provided in the oil discharge passage 34. Is installed. Therefore, the oil in the oil pan 21 and the supplementary oil tank 51 can be discharged from the oil discharge passage 34 to the deteriorated oil tank 33 by opening the third flow rate adjustment valve 35.

  The first oil property determination sensor 41 is disposed in the oil pan 21, and the second oil property determination sensor 42 is disposed in the oil return passage 25, and can respectively determine the degree of oil deterioration. The first oil level sensor 43 can detect the amount of oil stored in the oil pan 21.

  When the degree of deterioration of the oil determined by the oil property determination sensors 41 and 42 is equal to or less than the fourth determination value, the control device 44 opens the on-off valve 52 and sets the oil pan 21 and the refilling oil tank 51 in communication. To do. Then, good quality oil in the replenishing oil tank 51 is introduced into the oil pan 21, and the degree of deterioration of the oil in the oil pan 21 is suppressed.

  In addition, the control device 44 operates the oil pump 30 and the flow rate adjusting valves 31 and 42 when the degree of deterioration of the oil determined by the oil property determination sensors 41 and 42 is equal to or lower than the first determination value higher than the fourth determination value. The oil pan 26 is replenished to the oil pan 21 through the first oil replenishment passage 28 by controlling the opening / closing of the oil tank 32. On the other hand, when the degree of deterioration of the oil is higher than the fourth determination value and lower than the second determination value lower than the first determination value, the oil pump 30 is operated and the flow rate adjustment valves 31 and 32 are controlled to open and close. The oil supply passage 22 is replenished from the second oil replenishment passage 29 with the high-quality oil at 26.

  Further, the control device 44 releases the oil in the oil pan 21 by opening the third flow rate adjusting valve 35 when good quality oil in the oil tank 26 is replenished to the oil pan 21 and the oil supply passage 22. The oil is discharged from the passage 34 to the deteriorated oil tank 33. In this case, the control device 44 adjusts the opening of the third flow rate adjustment valve 35 based on the detection result of the oil level sensor 43 so that the amount of oil stored in the oil pan 21 becomes an appropriate amount.

  In this way, in the lubricating oil replenishing device in the engine of the second embodiment, the replenishing oil tank 51 in which high-quality oil is stored is arranged in the lower part of the oil pan 21 and can be communicated by the on-off valve 52. 44 opens the on-off valve 52 when the deterioration determination values of the oil property determination sensors 41 and 42 are equal to or lower than the fourth determination value, and replenishes the oil pan 21 with good quality oil.

  Therefore, when the oil in the oil pan 21 is deteriorated, the oil pan 21 is replenished with good quality oil in the replenishing oil tank 51, so that the good quality oil can be constantly supplied to the oil supply units 12, 13, and 14. The soundness of the operation in the oil supply units 12, 13, and 14 can be maintained.

  FIG. 5 is a schematic configuration diagram of the lubricating oil replenishing device in the engine according to the third embodiment of the present invention, and FIG. 6 is a flowchart showing oil supply control by the lubricating oil replenishing device in the engine of the third embodiment. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In the third embodiment, as shown in FIG. 5, the diesel engine 11 includes three oil supply units 12, 13, and 14, and an oil pan 21 is disposed below the three oil supply units 12, 13, and 14. The oil supply portions 12, 13, and 14 are connected to the oil supply portions 12, 13, and 14 through the passage 22 and the branch passages 22a, 22b, and 22c, and are connected to the oil supply portions 12, 13, and 14 through the oil return passage 25. An oil pump 23 and an oil filter 24 are attached to the oil supply passage 22.

  In addition, the diesel engine 11 is disposed below the oil pan 21 and adjacent to the oil pan 21. An oil tank 26 capable of storing high-quality oil is disposed, and the oil pan is passed through the oil supplement passage 27 and the first oil supplement passage 28. 21, and is connected to the oil supply passage 22 through the oil supplement passage 27 and the second oil supplement passage 29. The oil replenishing passage 27 is provided with an oil pump 30 at a branch portion, and flow rate adjusting valves 31 and 32 are attached to a first oil replenishing passage 28 and a second oil replenishing passage 29, respectively.

  The deteriorated oil tank 33 is located below the oil pan 21, and an oil discharge passage 34 is provided from the bottom of the oil pan 21 toward the deteriorated oil tank 33, and a third flow rate adjustment valve 35 is attached to the oil discharge passage 34. Has been. Therefore, the oil in the oil pan 21 can be discharged from the oil discharge passage 34 to the deteriorated oil tank 33 by opening the third flow rate adjustment valve 35.

  The first oil property determination sensor 41 is disposed in the oil pan 21, and the second oil property determination sensor 42 is disposed in the oil return passage 25, and can respectively determine the degree of oil deterioration. The first oil level sensor 43 can detect the amount of oil stored in the oil pan 21. Further, the second oil level sensor (second lubricating oil storage amount detection sensor) 61 detects the amount of oil stored in the oil tank 26. For example, the amount of oil stored depends on the position of the flow that floats in the oil. Is detected. The second oil level sensor 61 is not limited to this type.

  The control device 44 operates the oil pump 30 and controls the opening and closing of the flow rate adjusting valves 31 and 32 when the degree of deterioration of the oil determined by the oil property determination sensors 41 and 42 is equal to or less than the first determination value. The oil pan 21 is replenished to the oil pan 21 through the first oil replenishment passage 28. On the other hand, when the degree of deterioration of the oil is equal to or lower than the second determination value lower than the first determination value, the oil pump 30 is operated and the flow rate adjustment valves 31 and 32 are controlled to open and close. The oil supply passage 22 is replenished from the second oil replenishment passage 29.

  Further, the control device 44 opens the third flow rate adjustment valve 35 based on the detection result of the first oil level sensor 43 when good quality oil in the oil tank 26 is replenished to the oil pan 21 or the oil supply passage 22. The amount of oil stored in the oil pan 21 is maintained at an appropriate amount by adjusting the degree. Further, when the high-quality oil in the oil tank 26 is replenished to the oil pan 21 or the oil supply passage 22, the control device 44 operates the alarm 62 based on the detection result of the second oil level sensor 61, and the oil tank It informs that the oil in 26 has decreased to a predetermined amount or less. In this case, the alarm 62 is lighting of a warning lamp, display of a warning display panel, issuing of a warning sound, or the like.

  Therefore, in the lubricating oil replenishing device in the diesel engine 11 of the third embodiment, as shown in FIG. 6, in step S31, the control device 44 checks the outputs (degradation judgment values) of the oil property judgment sensors 41 and 42. In step S32, it is determined whether the deterioration determination value is equal to or less than the first determination value. Here, if it is determined that the oil deterioration determination value is not equal to or less than the first determination value, in step S40, the routine is exited with the valves (respective flow rate adjusting valves) 31 and 32 being closed.

  On the other hand, if it is determined in step S32 that the oil deterioration determination value is equal to or less than the first determination value, in step S33, the control device 44 causes the deterioration determination value to rapidly decrease (the rate of change is large). Whether the deterioration determination value is less than or equal to the second determination value. If it is determined that the oil deterioration determination value is not less than or equal to the second determination value, the oil pump 30 is activated and the normal valve, that is, the first flow rate adjustment valve 31 is opened in step S34. Then, good quality oil stored in the oil tank 26 is replenished to the oil pan 21 through the oil replenishment passage 27 and the first oil replenishment passage 28.

  On the other hand, if it is determined that the oil deterioration determination value is equal to or less than the second determination value, the oil pump 30 is activated and the emergency valve, that is, the second flow rate adjustment valve 32 is opened in step S35. High quality oil stored in the oil tank 26 is replenished to the oil supply passage 22 through the oil replenishment passage 27 and the second oil replenishment passage 29.

  In step S36, the control device 44 checks the output of the first oil level sensor 43, and determines in step S37 whether the amount of oil in the oil pan 21 is excessive. Here, if the amount of oil stored in the oil pan 21 is larger than the appropriate amount, the waste oil valve, that is, the third flow rate adjustment valve 35 is opened in step S38, and the oil in the oil pan 21 is discharged from the oil discharge passage 34. Discharge into the deteriorated oil tank 33. On the other hand, if the amount of oil stored in the oil pan 21 is less than the appropriate amount, the waste oil valve, that is, the third flow rate adjustment valve 35 is closed in step S39.

  In Steps S34 and S35, after the first flow rate adjusting valve 31 is opened and good oil in the oil tank 26 is replenished to the oil pan 21 and the oil supply passage 22, the controller 44 in Step S41 (2) The output of the oil level sensor 61 is checked, and it is determined in step S42 whether or not the oil amount (preservation oil) in the oil tank 26 has decreased to a predetermined value or less. Here, if it is determined that the amount of oil in the oil tank 26 has not decreased to a predetermined value or less, this routine is exited without doing anything. On the other hand, if it is determined that the amount of oil in the oil tank 26 has decreased to a predetermined value or less, the alarm 62 is activated in step S43.

  At this time, the operator replenishes the oil tank 26 with good quality oil according to the operation of the alarm 62.

  Thus, in the lubricating oil replenishing device in the engine of the third embodiment, the oil pan 21 is replenished with good quality oil when the deterioration determination values of the oil property determination sensors 41 and 42 are equal to or lower than the first determination value. When the deterioration determination value is less than or equal to the second determination value, good quality oil is replenished to the oil supply passage 22. When the good quality oil stored in the oil tank 26 decreases, the alarm 62 is activated.

  Therefore, when the degree of deterioration of the oil returning from the oil supply units 12, 13, and 14 is small, the oil pan 21 is supplemented with good quality oil, while when the degree of deterioration of the oil returning from the oil supply units 12, 13, and 14 is large, When the oil supply passage 22 is replenished with good quality oil and the degree of deterioration of the oil is large, the good quality oil can be supplied to the oil supply units 12, 13, and 14, and the oil supply units 12, 13, and 14 The soundness of operation can be maintained. Further, when the amount of good oil in the oil tank 26 decreases, the alarm 62 is activated, so that the oil tank 26 can be replenished with good quality oil, and can always be replenished with good quality oil. .

  FIG. 7 is a schematic configuration diagram of a lubricating oil replenishing device in an engine according to Embodiment 4 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In the fourth embodiment, as shown in FIG. 7, the diesel engine 11 includes three oil supply units 12, 13, and 14, and an oil pan 21 is disposed below the three oil supply units 12, 13, and 14. The oil supply portions 12, 13, and 14 are connected to the oil supply portions 12, 13, and 14 through the passage 22 and the branch passages 22a, 22b, and 22c, and are connected to the oil supply portions 12, 13, and 14 through the oil return passage 25. An oil pump 23 and an oil filter 24 are attached to the oil supply passage 22.

  In addition, the diesel engine 11 is disposed below the oil pan 21 and adjacent to the oil pan 21. An oil tank 26 capable of storing high-quality oil is disposed, and the oil pan is passed through the oil supplement passage 27 and the first oil supplement passage 28. 21, and is connected to the oil supply passage 22 through the oil supplement passage 27 and the second oil supplement passage 29. The oil replenishing passage 27 is provided with an oil pump 30 at a branch portion, and flow rate adjusting valves 31 and 32 are attached to a first oil replenishing passage 28 and a second oil replenishing passage 29, respectively.

  The diesel engine 11 is provided with an oil supply unit 15 in addition to the three oil supply units 12, 13, and 14. The oil pan 21 is connected to the oil supply unit 15 through the oil supply passage 22 and the branch passage 22d. At the same time, the oil supply passage 15 is connected through the oil return passage 25. Further, the oil tank 26 is connected to the oil supply unit 15 through the third oil replenishment passage 71, and the oil pump 72 is attached to the third oil replenishment passage 71. Here, the third oil replenishing passage 71 and the oil pump 72 function as the third lubricating oil replenishing device of the present invention.

  The deteriorated oil tank 33 is located below the oil pan 21, and an oil discharge passage 34 is provided from the bottom of the oil pan 21 toward the deteriorated oil tank 33, and a third flow rate adjustment valve 35 is attached to the oil discharge passage 34. Has been. Therefore, the oil in the oil pan 21 can be discharged from the oil discharge passage 34 to the deteriorated oil tank 33 by opening the third flow rate adjustment valve 35.

  The first oil property determination sensor 41 is disposed in the oil pan 21, and the second oil property determination sensor 42 is disposed in the oil return passage 25, and can respectively determine the degree of oil deterioration. The first oil level sensor 43 can detect the amount of oil stored in the oil pan 21.

  The control device 44 operates the oil pump 30 and controls the opening and closing of the flow rate adjusting valves 31 and 32 when the degree of deterioration of the oil determined by the oil property determination sensors 41 and 42 is equal to or less than the first determination value. The oil pan 21 is replenished to the oil pan 21 through the first oil replenishment passage 28. On the other hand, when the degree of deterioration of the oil is equal to or lower than the second determination value lower than the first determination value, the oil pump 30 is operated and the flow rate adjustment valves 31 and 32 are controlled to open and close. The oil supply passage 22 is replenished from the second oil replenishment passage 29.

  Further, the control device 44 operates the oil pump 72 when the degree of deterioration of the oil determined by the oil property determination sensors 41 and 42 is equal to or lower than the third determination value lower than the second determination value, and the good quality in the oil tank 26 is obtained. Oil is replenished from the third oil replenishment passage 71 to the oil supply unit 15. In other words, the oil supply unit 15 is a place that is more important for oil supply than the oil supply units 12, 13, and 14, and is, for example, a sliding surface of a piston. Therefore, when the oil returning from here is abnormally deteriorated, high-quality oil is supplied directly to the oil supply unit 15 at an early stage, not to the oil pan 21 or the oil supply passage 22.

  As described above, in the lubricating oil replenishing device in the engine of the fourth embodiment, the oil pan 21 is replenished with good quality oil when the deterioration determination values of the oil property determination sensors 41 and 42 are equal to or lower than the first determination value. When the deterioration determination value is less than or equal to the second determination value, good quality oil is replenished to the oil supply passage 22. Further, when the oil tank 26 is connected to the oil supply unit 15 through the third oil replenishment passage 71 and the degree of deterioration of the oil determined by the oil property determination sensors 41 and 42 is equal to or lower than the third determination value lower than the second determination value. The oil supply unit 15 is replenished with good quality oil.

  Therefore, when the degree of deterioration of the oil returning from the oil supply units 12, 13, and 14 is small, the oil pan 21 is supplemented with good quality oil, while when the degree of deterioration of the oil returning from the oil supply units 12, 13, and 14 is large, When the oil supply passage 22 is replenished with good quality oil and the degree of deterioration of the oil is large, the good quality oil can be supplied to the oil supply units 12, 13, and 14, and the oil supply units 12, 13, and 14 The soundness of operation can be maintained. In addition, when the quality of the oil returning from the oil supply unit 15 is remarkably deteriorated, it is possible to supply high-quality lubricating oil to the oil supply unit 15 at an early stage by supplying high-quality oil directly to the oil supply unit 15. Thus, the soundness of the operation in the oil supply unit 15 can be maintained.

  In each of the above-described embodiments, the second oil property determination sensor 42 is provided with one oil return passage 25, but a plurality of oil return passages are provided for each of the oil supply units 12, 13, 14, and 15, and each oil An oil property determination sensor may be provided in the return passage, and in this case, high-quality oil can be supplied to any of the oil supply units 12, 13, 14, and 15 in which oil deterioration has progressed.

  Further, in each of the above-described embodiments, the lubricating oil replenishing device in the engine according to the present invention has been described as applied to a diesel engine for navigation that is mounted on a ship, but is used for a land boiler or the like. You may apply to a diesel engine.

  The lubrication oil replenishing device in the engine according to the present invention replenishes the lubricating oil supply passage with good quality lubricating oil when the degree of degradation of the lubricating oil is large, thereby supplying an appropriate lubricating oil according to the degree of degradation of the lubricating oil. It can be applied to any engine.

11 Diesel engine 12, 13, 14 Oil supply part (lubricating oil supply part)
21 Oil pan (first lubricating oil reservoir)
22 Oil supply passage (lubricating oil supply passage)
23 Oil pump (lubricating oil supply pump)
25 Oil return passage (lubricating oil return passage)
26 Oil tank (second lubricating oil reservoir)
27 Oil replenishment passage (first lubricating oil replenishing device, second lubricating oil replenishing device)
28 1st oil replenishment passage (1st lubricating oil replenishment apparatus)
29 Second oil replenishment passage (second lubricating oil replenishment device)
30 Oil pump (first lubricating oil replenishing device, second lubricating oil replenishing device)
31 1st flow regulating valve (1st lubricating oil replenishment apparatus)
32 Second flow regulating valve (second lubricating oil replenishing device)
33 Deteriorated oil tank (lubricating oil discharge device)
34 Oil discharge passage (lubricating oil discharge device)
35 Third flow control valve (lubricating oil discharge device)
41 1st oil property determination sensor (lubricating oil property determination sensor)
42 Second oil property determination sensor (lubricant property determination sensor)
43 1st oil level sensor (1st lubricating oil storage amount detection sensor)
44 Control device (lubricant replenishment passage selection device)
51 Replenishing oil tank 52 On-off valve 61 Second oil level sensor (second lubricating oil storage amount detection sensor)
62 Alarm 71 Third oil refilling passage (third lubricating oil refilling device)
72 Oil pump (third lubricating oil replenishing device)

Claims (6)

A first lubricating oil reservoir;
A lubricating oil supply passage capable of supplying the lubricating oil in the first lubricating oil reservoir to a lubricating oil supply in the engine;
A lubricating oil supply pump provided in the lubricating oil supply passage;
A lubricating oil return passage for returning the lubricating oil supplied to the lubricating oil supply section to the first lubricating oil storage section;
A second lubricating oil reservoir that can store good quality lubricating oil;
A first lubricating oil replenishing device capable of replenishing the first lubricating oil reservoir with lubricating oil in the second lubricating oil reservoir;
A second lubricating oil replenishing device capable of replenishing the lubricating oil in the second lubricating oil reservoir to the upstream side of the lubricating oil supply pump in the lubricating oil supply passage;
A lubricating oil property determination sensor that determines a deterioration degree of the lubricating oil flowing through the lubricating oil return passage and outputs a lower deterioration determination value as the deterioration degree is larger ;
The first lubricating oil replenishing device is operated when the deterioration determination value of the deterioration degree of the lubricating oil determined by the lubricating oil property determination sensor is equal to or less than the first determination value, while the deterioration determination value of the deterioration degree of the lubricating oil is the first. A lubricating oil replenishment passage selection device that operates the second lubricating oil replenishment device when the second determination value is less than a second determination value,
A lubricating oil replenishing device for an engine, comprising:   The lubricating oil replenishment passage selection device calculates a change rate of the deterioration determination value by the lubricating oil property determination sensor, and operates the second lubricating oil replenishment device when the current change rate is larger than a preset threshold value. The lubricating oil replenishing device for an engine according to claim 1.   A lubricating oil discharging device for discharging lubricating oil in the first lubricating oil reservoir is provided, and the lubricating oil replenishment passage selecting device is configured to operate when the first lubricating oil replenishing device or the second lubricating oil replenishing device is operated. The lubricating oil replenishing device for an engine according to claim 1 or 2, wherein the lubricating oil discharging device is operated.   A lubricating oil discharging device that discharges lubricating oil in the first lubricating oil reservoir, and a first lubricating oil storage amount detection sensor that detects a stored amount of lubricating oil in the first lubricating oil reservoir, are provided, and the lubricating oil is replenished 3. The lubricating oil replenishing device for an engine according to claim 1, wherein the passage selecting device operates the lubricating oil discharging device based on a detection result of the first lubricating oil storage amount detection sensor.   A second lubricating oil storage amount detection sensor that detects the amount of lubricating oil stored in the second lubricating oil storage unit is provided, and the lubricating oil supplement passage selecting device is based on a detection result of the second lubricating oil storage amount detection sensor. 5. The lubricating oil replenishing device for an engine according to claim 1, wherein an alarm is activated. A plurality of the lubricating oil supply units; a third lubricating oil replenishing device capable of directly supplying the lubricating oil in the second lubricating oil storage unit to only one of the plurality of lubricating oil supply units ; The oil replenishment passage selection device operates the third lubricating oil replenishment device when the deterioration determination value of the degree of deterioration of the lubricating oil determined by the lubricating oil property determination sensor is equal to or lower than a third determination value lower than the second determination value. The lubricating oil replenishing device for an engine according to any one of claims 1 to 5.

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