JPH07224628A - Lubricating oil supply device for engine - Google Patents

Abstract

PURPOSE:To provide the lubricating oil supply device of an engine capable of eliminating the defect of a conventional lubricating oil supply device, and supplying the adequate quantity of lubricating oil to respective separation supply points by one lubricating oil pump. CONSTITUTION:In the lubricating oil supply device 12 of an engine wherein lubricating oil is separately supplied to the plural piston sliding surfaces and plural journal bearing parts of an engine 1 by a lubricating supply system 13, one lubricating oil pump 15 and plural lubricating oil passages 18 and 19 communicated with it are provided on the lubricating oil supply system 13. The plural lubricating oil supply passages 18 and 19 are connected to the respective piston sliding surfaces and the journal bearing parts to change the quantity of the lubricating oil supplied to respective lubricated parts from the lubricating oil pump 15 in accordance with the respective lubricated parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating oil supply device for an engine, and more particularly to a supplying device improved so that an appropriate amount of lubricating oil can be supplied to each lubricated portion.

[0002]

2. Description of the Related Art As a lubricating oil supply device for an engine, there is one that employs a system in which lubricating oil is intermittently directly injected and supplied to a lubricated portion such as a piston sliding surface and a crank journal bearing portion. In the above method, since the piston sliding surface and the lubricated portion such as the crank journal bearing portion have different consumption amounts of lubricating oil even when the engine is in the same operating state,
To prevent partial wasting of excess lubricating oil and wasting it, prepare different lubricating oil pumps for each type of separate supply points (for example, piston sliding surface and crank journal bearing). Lubricating oil is being supplied.

[0003]

However, if a lubricating oil pump is provided for each type of each separate supply point as described above, the apparatus becomes complicated and problems remain in terms of weight, cost and the like. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a lubricating oil supply device capable of supplying an appropriate amount of lubricating oil to each separated supply point with one lubricating oil pump.

[0004]

In order to achieve the above object, a lubricating oil supply apparatus for an engine according to the present invention is an engine lubrication system in which a lubricating oil supply system separates and supplies lubricating oil to a plurality of lubricated parts of the engine. In the oil supply device, a lubricating oil supply system is provided with one lubricating oil pump and a plurality of lubricating oil supply passages, and the plurality of lubricating oil supply passages are connected to a plurality of lubricated parts of different properties of the engine, It is characterized in that the amount of lubricating oil supplied from the lubricating oil pump to each lubricated portion can be changed according to each lubricated portion. The lubricating oil pump may be configured to be capable of distributing and discharging the lubricating oil to a plurality of lubricated portions having different properties at a predetermined ratio, and to allow the lubricating oil pump to be evenly distributed and ejected to the plurality of lubricated portions. In the configuration, a three-way valve is provided in a lubricating oil supply passage connected to one of a plurality of lubricated parts that consumes less lubricating oil per unit time, and a return passage connected to the lubricating oil tank is provided in the three-way valve. Excess lubricating oil may be returned to the lubricating oil tank by a three-way valve.
In this case, a control device that can change the operation cycle of the three-way valve according to the operating state of the engine may be provided to control the drive of the three-way valve, and a sensor that detects the current operating state of the engine. And a means for calculating the consumption of lubricating oil in the lubricated part of the one provided with the three-way valve, based on the information on the current operating state of the engine obtained by this sensor, and the consumption of this lubricating oil. And a means for comparing the discharge amount of the lubricating oil pump once, and based on the comparison result, the three-way valve is driven so that the lubricating oil returns to the lubricating oil tank until the consumption amount of the lubricating oil reaches the discharging amount. It is also possible to provide a control device composed of means for controlling the drive of the three-way valve. The lubricated portion may be a sliding surface between the journal bearing portion of the crankshaft and the piston. Further, means for providing a sensor for detecting the current operating state of the engine, and estimating and calculating the consumption amount of the lubricating oil at each time in each lubricated portion based on the information on the current operating state of the engine obtained by this sensor And an integrating means for integrating the unit consumptions calculated by the calculating means, and when the integrated consumption reaches one discharge amount of the lubricating oil pump, the lubricating oil pump is driven to drive the next lubricating oil. A control device including an oil supply control means for supplying may be provided, and the discharge time interval of the lubricating oil pump may be varied according to the operating state of the engine. The operating state of the engine described above can be detected from the engine speed and the throttle opening.

[0005]

According to the lubricating oil supply apparatus of the present invention configured as described above, the lubricating oil is supplied from one lubricating oil supply pump to the plurality of lubricated parts having different properties of the engine through the lubricating oil supply passage. To supply. At this time, since the amount of the lubricating oil supplied from the lubricating oil pump can be changed according to the lubricated parts having different properties, it is possible to use a plurality of lubricated parts having different lubricating oil consumption amounts per unit time. Also, a single lubricating oil supply pump supplies an appropriate amount of lubricating oil. When the lubricating oil pump itself is configured to be able to distribute and discharge to a plurality of lubricated parts at a predetermined ratio, an appropriate amount of lubricating oil is supplied to each lubricated part without additionally providing a complicated device. In addition, the lubricating oil pump itself is configured to discharge an equal amount of lubricating oil to a plurality of lubricated parts, and a lubricating oil supply passage for the person who wants to limit the amount of lubricating oil supply has a return passage leading to the lubricating oil tank. If a three-way valve is provided, excess lubricating oil is returned to the lubricating oil tank by this three-way valve. The operation cycle of the three-way valve is changed by a control device that changes the operation cycle of the three-way valve according to the operating state of the engine. When a control device for controlling the discharge time interval of the lubricating oil pump is provided together, the discharge time interval can be controlled in addition to the discharge amount of the lubricating oil for one cycle from the lubricating oil pump. It becomes possible to supply to the lubricated part.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lubricating oil supply system for a two-cycle engine according to the present invention will be described below with reference to the accompanying drawings. 1 to 3 are views showing a first embodiment of a lubricating oil supply device of the present invention, FIG. 1 is a schematic configuration diagram of the lubricating oil supply device, and FIG. 2 is a diagram showing a configuration of the lubricating oil pump in FIG. ,
FIG. 3 is a block diagram showing a schematic configuration of a control device in the lubricating oil supply device. In FIG. 1, 1 is 3
The figure shows a two-cycle cylinder diesel engine, which is constructed by stacking and fastening a crankcase 2, a cylinder block 3, and a cylinder head 4. Inside the cylinder block 3, three pistons 5 are provided,
Each of these pistons 5 is connected by a connecting rod 6 to a crankshaft 7 arranged inside the crankcase 2. Further, a fuel injection valve 8 is arranged in the cylinder head 4, and the fuel supplied from the injection valve 8 is compressed and exploded by the piston 5, and the power thereof is provided by a clutch 9 provided at one end of the crankshaft 7. Is transmitted to the mission 10 via. In FIG. 1, the piston 5 located at the left end is at top dead center, and the piston 5 located at the right end is at bottom dead center. Reference numeral 11 in the figure denotes an engine speed detection sensor for picking up the engine speed. Also, the engine 1
Is provided with a lubricating oil supply device 12, and this supplying device 12 includes a lubricating oil supply system 13 and a control device 14. The lubricating oil supply system 13 includes a distribution type lubricating oil pump 15
A lubricating oil tank 17 is connected to the suction side of the lubricating oil pump 15 via an introduction passage 16. Three first supply passages 18 and three second supply passages 19 are connected to the discharge side of the lubricating oil pump 15, and the ends of the first supply passages 18 have three journal bearing portions of the crankshaft 7, respectively. In addition, each end of the second supply passage 19 is connected to the piston sliding surface. Part of the lubricating oil supplied to the journal bearing portion is guided to the large end of the connecting rod 6 through the inside of the crankshaft, and part of the lubricating oil supplied to the piston sliding surface scatters in the form of mist. Is guided to the small end of the connecting rod 6.
The lubricating oil pump 15 is rotationally driven by the pulse motor 21 based on the drive signal of the control device 14 independently of the engine rotation. The lubricating oil pump 15 supplies the amount Pq supplied to the journal bearing portion and the amount P supplied to the piston sliding surface.
By changing the ratio with r, an appropriate amount of lubricating oil is supplied to each lubricated part in one cycle. The discharge time interval T of the lubricating oil pump 15 is variably controlled by the controller 14.

The construction of the lubricating oil pump 15 will be described below. Reference numeral 20 in the drawing denotes an outer case, and each of the supply passages 18 (18a, 18b, 18) is provided in the outer case 20.
c), 19 (19a, 19b, 19c) corresponding to the discharge passage 22 and the suction passage 23 connected to the introduction passage 16
Are alternately formed (see FIG. 2B). A cylindrical cam body 24 is rotatably provided inside the outer case 20. A gear 25 is integrally formed on the cam body 24, and the gear 25 meshes with a gear 26 provided on the pulse motor 21. A hole 24a penetrating in the axial direction is formed in the cam body 24. This hole 24a
A lubricating oil supply pin 27 is slidably inserted in this.
The supply pin 27 is provided with a cam pin 27a extending outward in the radial direction, and is normally urged to the left side in FIG. 2A by an appropriate elastic member such as a spring 28. A connection passage 30 is formed at one end of the cam body 24, and the connection passage 3 is formed during one rotation of the cam body 24.
0 and the passages 22 and 23 formed in the main body 20 coincide with each other once, so that the passages 22 and 23 and the hole 24a provided in the cam body 24 communicate with each other. Also, the cam body 24
To the other end of the cam pin 27 provided on the supply pin 27.
A cam groove 31 with which a is engaged is formed. Figure 2 (c)
Is the cam groove 31 of the cam body 24 showing the shape of the cam groove 31.
A schematic development view of the periphery is shown, and as shown in the figure, the cam groove 31 is formed with three grooves of two kinds of depths h1 and h2 alternately. When the cam body 24 is rotated by the pulse motor 21, the supply pin 27 does not rotate, so that the cam pin 27a provided on the supply pin 27 moves along the cam groove 31 and the connection passage 30 moves to the outer case 20. The supply pin 27 is slid in the left-right direction in FIG. 2A at a timing that matches the formed passages 22 and 23. For example, when the cam pin 27a is at the top 31a of the groove 31, the supply pin 27 moves to the right in FIG. 2A against the force of the spring 28 to suck the lubricating oil from the lubricating oil tank 17, Further, as the cam pin 27a moves toward the bottom portion 31b of the groove 31, the sucked lubricating oil is pushed out to any of the corresponding supply passages 18 and 19 through the matching discharge passage 23. In the embodiment shown in FIG. 2, the cam pin 27a has a w in the cam groove 31.
While in the range of 1, w5, w9, the connecting passage 30 matches any one of the discharge passages 23 connected to the second supply passage 19 and discharges lubricating oil to the piston sliding surface side.
While in the range of w6 and w8, the connection passage 30 has the suction passage 2
2 and sucks the lubricating oil from the lubricating oil tank 17 and further matches with any of the discharge passages 23 connected to the first supply passage 18 to the journal bearing portion side while it is within the range of w3 and w7. Discharge the lubricating oil. The lubricating oil pump 15 configured as described above is rotationally driven by the pulse motor 21 based on the drive signal from the control device 14, and each time the internal cam body 24 makes one revolution, each piston sliding surface and each journal are driven. Lubricating oil is supplied to the bearing once. At this time, the supply amount P of the lubricating oil is such that the amount Pr of the lubricating oil supplied to each piston sliding surface side becomes larger than the supply amount Pq of the lubricating oil supplied to each journal bearing side, and at the same time. Therefore, excessive lubricating oil is not supplied to the journal bearing side, which consumes less lubricating oil than the piston sliding surface side.

The schematic structure of the control device 14 for outputting a drive signal to the pulse motor 21 will be described below with reference to the block diagram of FIG. The control device 14 uses the unit consumption calculation means 4
1, it has an integrating means 42 and a refueling control means 43. The unit consumption calculating means 41 is based on the engine speed signal a and the throttle opening signal b from the engine speed detecting sensor 11a and the throttle opening detecting sensor 11b, and the engine speed calculating means 41a and the load calculating means 4 are used.
Input the information of engine speed and load calculated in 1b. After inputting each of the above information, the unit consumption calculating means 41 searches the map 1 to calculate the lubricating oil consumption r of the piston sliding surface for each engine revolution (hereinafter referred to as the unit consumption r).
To calculate. The map shows the engine speed, load, and unit consumption created based on the data of the amount of lubricating oil consumed by the journal bearing and piston sliding surface for each engine speed and load, obtained in advance by experiments. It is a three-dimensional map consisting of the amount r and is set so that the consumption amount increases as the load and rotation increase. The unit consumption amount r on the piston sliding surface calculated by the unit consumption amount calculating unit 41 is integrated by the integrating unit 42, and the total amount of lubricating oil consumed on the piston sliding surface (hereinafter referred to as the required amount R Will be calculated).

The refueling control means 43 comprises a determination means 43a and a lubricating oil pump drive signal output means 43b, and the required amount R is stored in the pump discharge amount storage means 44 in advance.
When the required amount R reaches the discharge amount Pr of the lubricant oil pump 15, the lubricant oil pump 15 is driven to drive the lubricant oil pump 15 by comparing the discharge amount Pr of the lubricant oil supplied to the piston sliding surface by the cycle. Discharge one cycle of lubricating oil to the lubrication section.

According to the lubricating oil supply apparatus of the first embodiment constructed as described above, the discharge time interval T of the lubricating oil pump is controlled by the control unit 14, and the required amount R of lubricating oil in the lubricated portion is R. Does not operate until the supply amount Pr from the lubricant oil pump 15 exceeds once, and when the required amount R exceeds the supply amount Pr, the lubricant oil pump 15 is driven to discharge the lubricant oil for one cycle. Since it is configured, the lubricating oil can be efficiently supplied and one cycle (that is, the internal cam body 24 is
The lubricating oil pump 15 is configured to distribute and discharge the lubricating oil to each lubricated portion connected by (rotation), and the cam groove 3
Since the stroke length of the supply pin 27 is changed by changing the depth of 1 to change the supply amounts Pr and Pq of the lubricating oil supplied to the piston sliding surface and the journal bearing portion once, the piston sliding is performed at the same time. It is possible to supply an appropriate amount of lubricating oil to each lubricated portion by one lubricating oil pump 15 without supplying excessive lubricating oil to the journal bearing portion that consumes less lubricating oil than the moving surface. Play.

Next, another embodiment of the lubricating oil pump that can be used in the lubricating oil supply device 12 will be described. FIG. 4 is a schematic central longitudinal sectional view showing another embodiment of the lubricating oil pump. In the figure, reference numeral 50 indicates a lubricating oil pump. The lubricating oil pump 50 has a case 5 in which a case chamber 51a is formed.
1, the case chamber 51a has a cylindrical fitting hole 51b at the upper portion thereof. A cylindrical distributor 52, a supply pin 53, an adjusting pin 54, a worm gear 55, a worm wheel 56, and a cam projection 5 are provided inside the case chamber 51a.
7, a cam shaft 58, and a spring 59 are stored. The distributor 52 is fitted into the fitting hole 51b, is rotatable about the axis C while being in sliding contact with the inner peripheral surface of the fitting hole 51b, and is not movable in the vertical direction. A worm wheel 56 is integrally provided on the lower side of the distributor 52, and the worm wheel 56 meshes with a worm gear 55 that rotates independently of the engine 1 in response to a drive signal from the control device 14 (see FIG. 1). ing. A cam projection 57 is integrally attached to the lower end of the worm wheel 56. The cam projection 57 has a cylindrical shape, and like the cam grooves of the cam body 4 in the embodiment shown in FIG. 2, the cam grooves 57a of two kinds of depths (h1, h2) are alternately arranged on the circumference. 3 (see FIG. 2 (c)), and the cam groove 57a and the cam shaft 58 are engaged with each other by a cam. Further, a fitting hole 52a is formed in the distributor 52 so as to penetrate in the direction of the axis C, and the supply pin 53 is slidably fitted in the lower part of the fitting hole 52a and in the upper part thereof. The adjusting pin 54 is slidably fitted. The adjusting pin 54 projects outward from the upper end of the case 51, is urged in the outer direction of the case 51 by a spring 54a, and has a cam 61 to be described later.
Has been stopped by. A space formed between the supply pin 53 and the adjustment pin 54 in the fitting hole 52a serves as a pump chamber 60, and the distributor 52 has a lubricating oil passage 52c communicating with the pump chamber 60. A cam shaft 58 is integrally attached to the lower side of the supply pin 53. The cam shaft 58 is urged upward by a spring 59, and the supply pin 53 is also urged upward by this, so that the lower end of the adjusting pin 54 is urged unless it is urged downward against the force of the spring 59. The upper limit is moving to the upper side. The cam shaft 58 is the cam groove 5 of the cam projection 57 attached to the worm wheel 56 as described above.
7a, when the cam shaft 58 comes to the top of the cam groove 57a as the worm wheel 56 rotates, the cam shaft 58 moves downward against the spring 59, and the cam shaft 58 moves toward the cam projection groove 57a. When it comes to the bottom, the spring 59 moves upward. Therefore, the supply pin 53 moves up and down within the fitting hole 52a with the lower end of the adjusting pin 54 as the upper limit, in accordance with the movement of the cam shaft 58, sucking the lubricating oil into the pump chamber 60 and lubricating it from the pump chamber 60. Discharge oil. In the case 51, six discharge passages 51c and six suction passages 51d opening to the fitting holes 51b are alternately formed (see FIG. 4 (b), this drawing shows FIG. 4).
It is a BB sectional view of (a). ), This suction passage 51d
Is connected to the lubricating oil tank 17 through the introduction passage 16,
The discharge passage 51c is the first supply passage 18 (18a, 18b,
18c), the second supply passage 19 (19a, 19b, 19
It is connected to each lubricated part via c). Distributor 52
Is rotatably driven by the control device 14 (see FIG. 1) via the worm gear 55 and the worm wheel 56 as described above, and the lubricating oil passage 52c is formed in the case 51 while the distributor 52 makes one rotation. Each discharge passage 5
1c and each suction passage 51d once. The supply pin 53 also has a lubricating oil passage 52c of the pump distributor 52 due to the cam projection 57 as the distributor 52 rotates.
Is moved to the lower side when it matches with any of the suction passages 51d formed in the case 51 and sucks lubricating oil into the pump chamber 60, and moves upward when the lubricating oil passage 52c matches with any of the discharge passages 51. Pump room 6
The lubricating oil sucked into 0 is discharged. An upper cover 62 is attached to the upper end of the case 51 of the pump 50. The upper cover 62 is provided inside the cam 6 described above.
1 is provided. The rotation shaft 61a of the cam 61 is rotated by a drive signal from the control device 14 via a pulse motor (not shown) to move the adjustment pin 54 up and down. Therefore, the cam 61 moves the adjusting pin 54 up and down to change the stroke length of the supply pin, thereby changing the suction amount of the lubricating oil in the pump chamber 60 and the discharging amount of the lubricating oil from the pump chamber 60. .

The controller 14 outputs a drive signal to rotate the worm gear 55. In detail, the control device 14 does not drive the worm gear 55 until the lubricating oil requirement amount R on the piston sliding surface exceeds the one-time supply amount Pr of the pump 50, like the gear 26 in the embodiment of FIG. When the required amount R exceeds the supply amount Pr, a drive signal is output to a worm gear pulse motor (not shown) to rotationally drive the worm gear 55 to rotate the distributor 52 once. When the distributor 52 makes one rotation, the cam projection 57 provided integrally therewith also makes one rotation. Supply pin 5
3, the cam shaft 58 provided integrally therewith has the cam groove 5
Since the cam projection 7a is engaged with the cam 7a, it slides in the vertical direction with a stroke corresponding to the shape of the cam groove 57 (specifically, the depths h1 and h2 of the cam groove 57) as the cam projection 57 rotates. . As a result, the amount Pr of lubricating oil supplied to the piston sliding surface is made larger than the amount Pq of lubricating oil supplied to the journal bearing portion, and the amount of lubricating oil consumed is less than that of the piston sliding surface at the same time. One lubricating oil pump 50 supplies an appropriate amount of lubricating oil to each lubricated portion without supplying an excessive amount of lubricating oil. In addition to the worm gear 55, the controller 14 also outputs a drive signal to a pulse motor (not shown) for the cam 61 to rotate the cam 61 as well. Since the cam 61 regulates the upward movement of the adjusting pin 54 (that is, the upper limit of the supply pin 53) at the peripheral edge thereof, the control device 14 informs the control device 14 of the current operating state of the engine and the actual supply. Based on the information such as the amount of the lubricating oil, an error in the amount of the lubricating oil supplied to each lubricated portion is determined based on a map (not shown) that is uniquely made, and the cam 6
1 is rotationally driven to finely adjust the stroke of the supply pin 53.

The shape of the cam 61 shown in the lubricating oil pump 50 of this embodiment is not limited to that of this embodiment, and the adjustment pin 5 is not limited thereto.
Of course, any shape may be used as long as it can move 4 up and down. According to the lubricating oil pump 50 of this embodiment, the stroke of the supply pin 53 is set to the cam groove 5
7 and the position of the adjusting pin 54, the amount of the lubricating oil supplied from the lubricating oil pump 50 to each lubricated portion can be changed appropriately as in the embodiment shown in FIG. There is an effect that it can be changed in a wider range than that of the lubricating oil pump 15 and steplessly, and a finer control of the lubricating oil supply amount can be performed.

Next, a second embodiment of the lubricating oil supply apparatus according to the present invention will be described. 5 to 8 are views for explaining a second embodiment of the lubricating oil supply device, FIG. 5 is a schematic configuration diagram of the lubricating oil supply device, and FIG. 6 is a block showing a schematic configuration of a control device in the lubricating oil supply device. FIG. 7 is a flow chart for explaining the operation of the control device shown in FIG. 6, and FIG. 8 is a time chart of the lubricating oil pump, the three-way valve, and the control device.

In FIG. 5, the configuration other than the lubricating oil supply device 70 is the same as the configuration of the first embodiment shown in FIG. 1, and therefore its explanation is omitted. The lubricating oil supply device 70 includes a lubricating oil supply system 71 and a control device 72. Lubricating oil supply system 7
1 has a distribution type lubricating oil pump 73, and the suction side of this lubricating oil pump 73 is provided with a lubricating oil tank 7 via an introduction passage 74.
Connected to 5. The lubricating oil pump 73 has six discharge ports (not shown) so that the lubricating oil can be uniformly distributed and discharged in six directions in one cycle, three of which are connected to the first supply passage 76, A second supply passage 77 is connected to the remaining three. The first supply passage 76 has three pistons 5
Lubricating oil is connected to each sliding surface of the above, and a part of the lubricating oil supplied through this passage 76 is sprayed in the form of mist to be guided to the small end portion of the connecting rod 6. Second supply passage 77
Is connected so as to supply lubricating oil to the three journal bearing portions of the crankshaft 7, and the lubricating oil supplied through this passage 77 is a lubricating oil passage (not shown) provided inside the crankshaft 7. Is led to the large end of the connecting rod 6. A three-way valve 78 is interposed in the second supply passage 77, and the three-way valve 78 has a return passage 79 connected to the lubricating oil tank 75. The three-way valve 78 receives a drive signal from the controller 72 and operates an internal solenoid (not shown) or the like so that the lubricating oil flows to either the journal bearing portion side or the lubricating oil tank 75. 2 The path of the supply passage 77 is switched. The lubricating oil pump 73
Is driven to rotate independently of the engine rotation by a pulse motor (not shown) or the like based on the drive signal of the control device 72, and the discharge amount (oil supply amount) and discharge time interval of one cycle can be made variable. However, in this embodiment, the discharge amount P for one cycle is fixed, and the discharge time interval T is variably controlled by the controller 72.

The control device 72 will be described below. The control device 72 has a unit consumption calculation means 81, an integration means 82, and a refueling control means 83. The unit consumption calculating means 81 is based on the engine speed signal a and the throttle opening signal b from the engine speed detecting sensor 11a and the throttle opening detecting sensor 11b, and the engine speed calculating means 81a and the load calculating means 81b. Input the information of the current engine speed and load calculated in. After inputting each of the above information, the unit consumption calculating means 81 searches the map 1 to search for the lubricating oil consumption q '(hereinafter referred to as the unit consumption q') of the journal bearing portion for each engine revolution and the piston slide. The lubricating oil consumption amount r ′ of the moving surface (hereinafter referred to as unit consumption amount r ′) is calculated. The map 1 is similar to the map 1 of the first embodiment, and the amount of lubricating oil consumed by the journal bearing portion and the piston sliding surface for each engine speed and each load is obtained in advance by an experiment or the like, and based on the data. It is a three-dimensional map composed of the created engine speed, load and unit consumption, and is set so that the consumption increases as the load increases. The unit consumption q ', r'in each lubricated part calculated by the unit consumption calculating means 81 is input to the integrating means 82, and the sum of the lubricating oils accumulated there and consumed by each lubricated part (hereinafter , The requested amount Q ′, R ′) is calculated. The refueling control means 83 uses the determination means 83a to previously calculate the required amount R ′ on the piston sliding surface side by the pump discharge amount storage means 8
4 is compared with the discharge amount P of the lubricant oil pump 73 stored once, and when the required amount R ′ reaches the discharge amount P, a drive signal is output from the lubricant oil pump drive signal output means 83b to output the lubricant oil pump 73. Drive. The lubricating oil pump 73 receives this drive signal and drives for one cycle to uniformly discharge the lubricating oil in the six directions of the first supply passage 76 and the second supply passage 77. On the other hand, in the oil supply control means 83, the determination means 83a also compares the required amount Q ′ on the journal bearing side with the discharge amount P of the lubricating oil pump 73 once. Then, the output from the three-way valve drive signal output means 83c is turned on until the required amount Q ′ reaches the discharge amount P, and when the required amount Q ′ reaches the discharge amount P, the output signal from the three-way valve drive signal output means 83c. Turn off. The three-way valve 78 operates when the drive signal from the control device 72 is turned on to connect the second supply passage 77 from the lubricating oil pump 73 to the return passage 79 so that all the lubricating oil discharged from the lubricating oil pump 73 is lubricated. Return to tank 75. And the control device 72
When the drive signal from is turned off, the path is switched to connect the second supply passage 77 from the lubricating oil pump 73 to the second supply passage 77 on the journal bearing portion side, and the lubricating oil is supplied to the journal bearing portion.

The operation of the lubricating oil supply system 1 of this embodiment described above will be described below with reference to the flow chart of FIG. 7 and the time chart of FIG. In the description, the step number of the flowchart is described in parentheses after the operation corresponding to each step of the flowchart. ) When the ignition key is turned on, initial settings such as setting the required amounts Q ′ _N and R ′ _N in the integrating means 82 to zero are made (step 1), after which the lubricating oil pump 73 is driven and the three-way valve 78 is set. The drive signal is turned off to supply the lubricating oil to the journal bearing portion of the crankshaft and the sliding surface of the piston once or several times (step 2). After the operation of step 2 above, the engine is started (step 3). After the engine 1 is started, the engine speed detection sensor 11
It waits until the engine speed signal a is input from a and the throttle opening signal b is input from the throttle opening detection sensor 11b (step 4). When the signals a and b are input, the engine speed calculation means 81a and The load calculating means 81b obtains the current engine speed and load from these input signals a and b (step 5). When the engine speed and the load are obtained, the unit consumption calculating means 81 searches the prestored map 1 based on these information (step 6), and the respective lubricated parts (journal bearing part and piston slide) are searched. Unit consumption of lubricating oil r ′ _{N · n} (n = 1, 2, 3, ...), q ′
_{N · n} (n = 1, 2, 3, ...) Is calculated (step 7). Here, N indicates the number of times the lubricating oil pump 73 is driven. In the integrating means 82, the unit consumptions r ′ _{N · n} and q ′ _{N · n} in each lubricated part calculated by the unit consumption calculating means 81.
By integrating, which time consumption sum of the lubricating oil in the respective lubricated parts in the (n-th) (hereinafter, referred to as demand Q _'N · R' _N) is calculated (step 8). Determining means 83a is the first plus the requested amount R _'N to V _N in the cylinder sliding surface (carry-over demand to the next calculated in step 14 to be described later), which is stored in the memory means 84 The discharge amount P of the lubrication pump 73 at one time is compared, and when the discharge amount P is less than the discharge amount P, the step 4 is repeated.
Then, the process waits for input of the engine speed signal a and the throttle opening signal b (step 9). This program from Step 4 to Step 9 is repeated until the total required amount R _'N and carryover demand V _N of the lubricating oil in the cylinder sliding surface exceeds the discharge amount P of the lubricant pump cycle (Step 9) , 'When turned _N + V _N ≧ P, then the required amount Q in the journal bearing part' R a _N a plus U _N (carry-over demand to the next calculated in step 18 to be described later), the lubricant The discharge amount P of the pump 73 at one time is compared (step 10). Step 10 determines in the, Q _N + U _N ≧ P if (Figure 8 in t1, t4 reference) to turn off the drive signal from the three-way valve drive signal output unit 83c second supply passage 77 is a lubricating oil pump 73 The three-way valve 78 so as to connect to the journal bearing portion (step 11), and the drive signal from the lubricating oil pump drive signal output means 83b is turned on to supply the lubricating oil to the piston sliding surface and the journal bearing portion ( Step 1
2). After that, the next carry-over request for the piston sliding surface is defined as V _{N + 1} which is obtained by subtracting the actual discharge amount P from the sum of the required lubricating oil amount R ′ _N on the piston sliding surface and the carry-over required amount V _N. the amount and noticed (step 13), then journal minus the actual discharge quantity P from plus carry-over demand U _N in the lubricating oil of required amount Q _'N in journal bearing part as U _{N + 1} The next required carry-over amount for the bearing portion is set (step 14), and finally N is incremented to N + 1 (step 15), and the program returns to the processing of step 4. On the other hand, the determination in step 10 is Q _N + _UN <P
When it becomes (see t2 and t3 in FIG. 8), the drive signal is turned on from the three-way valve drive signal output means 83c,
The second supply passage 77 is provided with a return passage 79 from the lubricating oil pump 73.
Switch the three-way valve 78 to connect to (Step 1
6) After that, the driving signal from the lubricating oil pump driving signal output means 83b is turned on to supply the lubricating oil from the lubricating oil pump 73 toward the lubricated portion (step 17). At this time, the lubricating oil is supplied to the piston sliding surface side, but the lubricating oil supplied toward the journal bearing portion side is the three-way valve 7
8 is guided to the return passage 79 and is all returned to the lubricating oil tank 75. Then, the value obtained by subtracting the actual discharge amount P from the sum of the required amount of lubricating oil R ′ _N on the piston sliding surface and the required amount of carry-over V _N is taken as V _{N + 1} , and the next carry-over to the piston sliding face is carried out. Required amount and order (Step 1
8) Next, the sum of the required amount of lubricating oil Q ′ _N in the journal bearing and the required amount of carry-over U _N is set as the next required amount of carry-over to the UN ₊₁ journal bearing (step 1
9) Finally, N is incremented to N + 1 (step 20), and the program returns to the processing of step 4. As shown in the time chart of FIG. 8, V2, U by the processing of steps 13 to 15 as described above.
When the carry-over required amounts such as 2 are V _N > 0 and _UN > 0, these V _N and _UN are added to the next required amounts R ′ and Q ′. For example, V2 is added to R'2 and U2 is added to Q'2. The lubricating oil requirement of the piston manually side R _'N
Has reached a single discharge amount P of the lubricating oil pump 73,
Lubricant demand Q of the journal bearing part side _{'if N} does not reach the single discharge quantity P of the lubricating oil pump 73, the required amount Q at that time as the process in step 19' last carried forward _N Requested quantity U _N is added to next carried-over requested quantity U _{N + 1}
As a result, the carry-over required amount U _{N + 1} is added to the next required amount Q ′ _N. For example, U3 added with Q'2 becomes U3, and U3 added with Q'3 becomes U4. Through the above-described processing, the lubricating oil to be supplied can be provided in an appropriate amount according to the operating state. As described above, according to the second embodiment of the lubricating oil supply device, a certain amount P of lubricating oil can be evenly distributed and discharged to each lubricated portion (piston sliding surface and journal bearing portion) in one cycle. When the required amount R ′ of the lubricating oil on the configured lubricating oil pump 73 and the piston sliding surface that changes momentarily is calculated, and the required amount R ′ reaches the discharge amount P of the lubricating oil pump 73 once. Then, the lubricating oil pump 73 is driven for one cycle, and the required amount Q'of lubricating oil in the journal bearing portion is calculated.
Until the required amount Q ′ reaches the discharge amount P of the lubricating oil pump 73 once, the three-way valve 78 is driven to return the lubricating oil to the lubricating oil tank 75 without sending it to the journal bearing side. Since it is equipped with a control device 72 for controlling and a three-way valve 78 which is driven by the control device 72, one distribution type lubricating oil pump 73 is used for a unit such as a piston sliding surface and a journal bearing portion per unit time. An appropriate amount of lubricating oil can be supplied to the many lubricated parts with different consumptions of lubricating oil without excess or deficiency, and the consumption of lubricating oil can be reduced and the generation of white smoke caused by incomplete combustion due to excessive supply can be reduced. Can be made.

Next, the control device 72 in the second embodiment described above.
Another embodiment will be described. 9 and 10 are views for explaining another embodiment of the control device, FIG. 9 is a flowchart for explaining the operation of the control device, and FIG. 10 is a time chart of the lubricating oil pump, the three-way valve, and the control device. Shows. In this case, the lubricating oil of required amount R '' _N, Q 'in the piston sliding surface and the journal bearing unit based on the information indicating the operating condition of the engine to calculate the' _N, of the lubricating oil in the piston sliding surface The process up to the step of determining whether the required amount R ″ _N has reached the single discharge amount P of the lubricating oil pump (steps 1 to 9) is the same as the control device 72 in the second embodiment. . When the required amount R ″ _{N on the} sliding surface of the piston reaches the discharge amount of the lubricating oil pump (see t1 in FIG. 10), the required amount Q ″ _N on the journal bearing portion is _UN (calculated in step 18 described later). And the amount required to be carried over to the next time) are compared with the one-time discharge amount P of the lubricating pump 73 (step 10). Determination in step 10 is, the second supply passage from the _{Q '' N + U N ≧} P if the lubricating oil pump 73 by turning off the drive signal from the three-way valve drive signal output means 83c in (see t1 in FIG. 10) The three-way valve 78 is switched so that 77 and the second supply passage 77 on the journal bearing side are connected (step 11), and then the lubricating oil pump drive signal output means 83
The drive signal from b is turned on to supply lubricating oil to the piston sliding surface and the journal bearing portion (step 12). After that, the required amount of lubricating oil R ″ on the piston sliding surface is
_The actual required amount P is subtracted from _N plus the required amount V _N to carry over, and V _{N + 1 is set} as the next required amount to carry over to the piston sliding surface (step 13). next carry-over demand and noticed demand Q '' _N of the lubricating oil obtained by subtracting the actual discharge quantity P from plus carry-over demand U _N for the journal bearing part as U _{N + 1} in (step 14 ), And finally N is incremented to N + 1 (step 15), and the program returns to the processing of step 4. On the other hand, when the determination in step 9 is R ″ _N + V _N ≧ Pq and the determination in step 10 is Q ″ _N + _UN <P (see FIG. 1).
In 0 to t2 to t5), it is determined whether the three-way valve 78 is OFF at that time (step 1).
6). When the three-way valve 78 is OFF, the number of times the lubricating oil is continuously discharged to the journal bearing side based on the information on the current engine operating state (engine speed and load) calculated in step 5 ( Hereinafter, the number of continuous discharges N
(referred to as pr) is calculated (step 17). The continuous discharge number Npr is a map created in advance based on experimental results or the like (in the case of the present embodiment, it may be a three-dimensional map of engine speed, load and continuous discharge number, but other information such as cooling water temperature may be displayed. When inputting and determining the operating state of the engine based on the input information, it is necessary to create a map of the input information and the number of continuous discharges.) Alternatively, a preset calculation may be performed. You may calculate based on a formula. The continuous discharge number Npr is set to increase as the engine speed increases and the load increases.
When the engine speed is high, the discharge cycle of the lubricating oil pump 73 is usually short, and the discharge frequency is accordingly increased.
Therefore, the driving cycle of the three-way valve 78 is shortened and the number of times of driving is also increased.
There is a problem that the follow-up of No. 8 is delayed and the durability of the three-way valve 78 is reduced due to the increase in the number of times of driving. As described above, when there is a possibility that the three-way valve 78 will be overused when the engine speed is fast, the three-way valve 78 can be left in the OFF state and the lubricating oil can be continuously supplied to the journal bearing portion a plurality of times. Thus, the number of consecutive ejections Npr is set. Step 17
The number of consecutive ejections Npr calculated in step 3 is compared with the actual number of consecutive ejections Nr (step 18). Three-way valve 78 here
Is OFF (see t2 in FIG. 10)
Is limited to the case where the lubricating oil is supplied to the journal at least last time, so the initial value of Nr is
0 is set to Nr = 1 when it is _{Q '' N + U N ≧} P at. As a result of the comparison, the actual discharge number Nr is the continuous discharge number N.
Until reaching pr, the three-way valve 78 is kept OFF, the lubricating oil pump 73 is driven, and the lubricating oil is also supplied to the journal bearing portion side (step 12). on the other hand,
When the actual discharge number Nr reaches the continuous discharge number Npr (see t1 and t6 in FIG. 10), the three-way valve 78 is set to O.
The N state is set (step 19), and the lubricating oil pump 73 is driven to return the lubricating oil supplied to the journal bearing portion side to the lubricating oil tank 75 via the return passage 79 (step 20). Further, when it is determined in step 16 that the three-way valve 78 is in the ON state (t3, t4, t5 in FIG. 10).
(See step 19), while maintaining the ON state (step 19)
The lubricating oil pump 73 is driven (step 20), the lubricating oil is supplied only to the piston sliding surface, and the lubricating oil supplied to the journal bearing side is returned to the lubricating oil tank 75. After the three-way valve 78 is turned on (step 19) and the lubricating oil pump 73 is driven (step 20) as described above, a carry-over request is made to the required amount R ″ _N of lubricating oil on the piston sliding surface. The value obtained by subtracting the actual discharge amount P from the value obtained by adding the amount V _N is set as V _{N + 1 and set} as the next carry-over required amount for the piston sliding surface (step 21). The required amount Q ″ _N plus the required amount U _N to be carried forward is taken as U _{N + 1 and set} as the next required amount to be carried forward to the journal bearing portion (step 22), N
Is incremented to N + 1 (step 2
3) Finally, after setting Nr = 0 (step 24), the program is returned to the processing of step 4.

According to another embodiment of the control device 72 described above, the lubrication pumps 73 and the three-way valve 78 are combined in a simple structure, and each lubrication target has a different consumption amount of lubrication oil per unit time. It is possible to supply an appropriate amount of lubricating oil to each part, reduce the amount of lubricating oil consumed, prevent white smoke from being generated due to incomplete combustion, etc., and increase the number of times the three-way valve 78 operates unnecessarily. Since the above control can be performed without increasing the number, the problems such as the response delay of the three-way valve 78 and the deterioration of the durability of the three-way valve 78 due to the increase in the number of operations are eliminated, and a highly reliable lubricating oil supply device can be provided. become. In the present embodiment, the operating state of the engine is determined from the engine speed and the load, but this is not limited to the present embodiment, and any information can be used to determine the operating state of the engine at that time. Information, such as cooling water temperature or intake air temperature. However, when changing these input information, the data of the map 1 in the control device 14, 72 must also be changed according to the input information. still,
Although no reference is made to the break-in operation in the present embodiment, when the lubricating oil supply apparatus according to the present invention is also adapted to the break-in operation, the map 1 in the control devices 14 and 72 of each embodiment is: It is preferable to separately provide one during the break-in operation and one after the end of the break-in operation. In this case, whether or not the running-in operation is in progress or after the running-in operation is finished is determined based on the traveling distance and the like, and based on the result of the determination, the separately provided map is selected to perform control. . Normally, the required amount of lubricating oil is greatly reduced after the end of the break-in operation, and therefore the total lubricating oil consumption can be reduced by adopting a separate map and time constant as described above.

[0020]

The engine lubricating oil supply system of the present invention comprises:
One lubricating oil pump and a plurality of lubricating oil supply passages connected to it are provided in the lubricating oil supply system, and a plurality of lubricated parts of different engines of the engine are connected to the plurality of lubricating oil supply passages, respectively. Since the amount of lubricating oil supplied to each lubricated part can be changed according to each lubricated part, a lubricating oil pump corresponding to each type of lubricated part is provided. The effect of being able to supply a proper amount of lubricating oil to each lubricated part is achieved. In addition, this makes the device more complicated, increases the weight,
This has the effect of solving problems such as high costs.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a lubricating oil supply device.

FIG. 2 (a) is a schematic vertical sectional view of a lubricating oil pump in the center (b) (a) is a sectional view taken along the line AA in FIG.

FIG. 3 is a block diagram showing a schematic configuration of a control device in the lubricating oil supply device.

FIG. 4 (a) is a schematic vertical center sectional view showing another embodiment of the lubricating oil pump, and FIG. 4 (b) is a sectional view taken along line BB in FIG. 4 (a).

FIG. 5 is a schematic configuration diagram of a second embodiment of a lubricating oil supply device.

FIG. 6 is a block diagram showing a schematic configuration of a control device in the lubricating oil supply device.

FIG. 7 is a flowchart for explaining the operation of the control device shown in FIG.

FIG. 8 is a time chart of a lubricating oil pump, a three-way valve, and a control device.

FIG. 9 is a flowchart illustrating the operation of the control device.

FIG. 10: Time chart of lubricating oil pump, three-way valve, control device

[Explanation of symbols]

 1 2 cycle diesel engine 2 crankcase 3 cylinder block 4 cylinder head 5 piston 6 connecting rod 7 crankshaft 8 fuel injection valve 9 clutch 10 mission 11a engine speed detection sensor 11b throttle opening detection sensor 12 lubricating oil supply device 13 lubricating oil supply System 14 Controller 15 Distributor type lubricating oil pump 16 Introduction passage 17 Lubricating oil tank 18 First supply passage 19 Second supply passage 20 External case 21 Pulse motor 22 Suction passage 23 Discharge passage 24 Cam body 24a hole 25 Gear (cam body side) 26 Gear (pulse motor side) 27 Lubricating oil supply pin 27a Cam pin 28 Spring 30 Connection passage 31 Cam groove 31a Top 32b Bottom 41 Unit consumption calculation means 41a 41b 42 Accumulation means 43 Oil supply control means

Claims (8)

[Claims] 1. A lubricating oil supply device for an engine, wherein a lubricating oil supply system separates and supplies lubricating oil to a plurality of lubricated parts of an engine, wherein one lubricating oil pump and a plurality of lubricating oil supplies connected thereto are provided in the lubricating oil supply system. A passage is provided, and the plurality of lubricating oil supply passages are connected to a plurality of lubricated portions having different properties of the engine, and the amount of lubricating oil supplied from the lubricating oil pump to each lubricated portion is determined by each lubricated portion. A lubricating oil supply device for an engine, characterized in that it can be changed according to 2. The lubricating oil supply device for an engine according to claim 1, wherein the lubricating oil pump is configured to be capable of being distributed and discharged to a plurality of lubricated portions having different properties at a predetermined ratio. 3. A lubricating oil supply passage which is configured so that a lubricating oil pump can be evenly distributed and discharged to a plurality of lubricated parts, and which is connected to one of a plurality of lubricated parts that consumes less lubricating oil per unit time. The engine according to claim 1, characterized in that a three-way valve is provided in the engine, a return passage connected to the lubricating oil tank is provided in the three-way valve, and excess lubricating oil is returned to the lubricating oil tank by the three-way valve. Lubricating oil supply device. 4. The engine lubricating oil supply device according to claim 3, further comprising a control device for changing the operation cycle of the three-way valve in accordance with the operating state of the engine. 5. A lubricating oil is provided in a lubricated part in which one of the three-way valves is provided is provided with a sensor for detecting a current operating state of the engine, and based on information of the current operating state of the engine obtained by the sensor. Means for calculating the consumption amount of the lubricating oil, means for comparing the consumption amount of the lubricating oil with the discharge amount of the lubricating oil pump once, and based on the comparison result, until the consumption amount of the lubricating oil reaches the discharge amount. The lubricating oil supply device for the engine according to claim 3, further comprising a control device including means for driving the three-way valve so that the lubricating oil returns to the lubricating oil tank. 6. A sensor for detecting the current operating state of the engine is provided, and the consumption amount of the lubricating oil at each time in each lubricated portion is estimated based on the information on the current operating state of the engine obtained by this sensor. A means for calculating, and an integrating means for integrating the unit consumptions calculated by the calculating means,
A control device including a lubrication control means for driving the lubrication oil pump to supply the next lubrication oil when the accumulated consumption amount reaches one discharge amount of the lubrication oil pump is provided. The discharge time interval is variable according to the operating state of the engine.
To the lubricating oil supply device for an engine according to any one of claims 5 to 7. 7. The engine lubricating oil according to claim 4, wherein the operating state of the engine is detected from the engine speed and the throttle opening. Supply device. 8. The lubricating oil supply device for an engine according to claim 1, wherein the lubricated portion is a sliding surface between a journal bearing portion of a crankshaft and a piston. .