CN106837467A - A kind of engine lubrication system - Google Patents
A kind of engine lubrication system Download PDFInfo
- Publication number
- CN106837467A CN106837467A CN201710106627.9A CN201710106627A CN106837467A CN 106837467 A CN106837467 A CN 106837467A CN 201710106627 A CN201710106627 A CN 201710106627A CN 106837467 A CN106837467 A CN 106837467A
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- Prior art keywords
- oil
- pressure
- displacement
- variable
- oil pump
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/18—Indicating or safety devices
- F01M1/20—Indicating or safety devices concerning lubricant pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
- F01M2001/105—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the layout of the purification arrangements
- F01M2001/1078—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the layout of the purification arrangements comprising an oil pick-up tube to oil pump, e.g. strainer
Abstract
The present invention provides a kind of engine lubrication system, including displacement-variable oil pump, cleaner, oil sump, working connection, feedback oil circuit and lubricant passage way, the oil sucting cavity connection oil sump of displacement-variable oil pump, the oil-discharging cavity of displacement-variable oil pump connects the oil inlet of cleaner, the oil-out of cleaner connects the oil inlet of working connection, working connection branch forms feedback oil circuit and lubricant passage way, pressure-control valve is in series with feedback oil circuit, the oil-out for feeding back oil circuit connects the feedback oil pocket of displacement-variable oil pump, lubricant passage way is communicated to the bearing of the displacement-variable oil pump;The present invention is adjusted using displacement-variable oil pump and pressure-control valve to engine oil pressure, can reduce power consumption, it is ensured that preferable lubricant effect, it is to avoid the damage to engine critical component;And the present invention is lubricated using the clean machine oil after cleaner cleaning to bearing, the bearing of impurity abrasion lubricating oil pump can be prevented, effectively improve the life-span of lubricating oil pump.
Description
Technical field
The present invention relates to technical field of engines, and in particular to a kind of engine lubrication system.
Background technology
Engine lubrication system is one of important composition system of engine, and in the operation process of engine, machine oil rises
Very important effect, it is to play lubrication, sealing, cooling, buffering are played a part of again.In order to ensure that machine oil can be with
Each engine component for needing to be lubricated smoothly is reached, machine oil is it is necessary to have certain pressure.
In present engine lubrication system, the size of engine oil pressure primarily as lubricating oil pump rotation speed change, height turns
When fast, machine oil hydraulic is too high, by being adjusted to working connection pressure by draining mode using pressure limiting valve;In addition, admission cam
The diameter of slinger and exhaust cam slinger can also influence the pressure of machine oil, and when being relatively large in diameter of camshaft oil gallery can cause
The reduction of system engine oil pressure, if reducing the diameter of camshaft oil gallery, can increase the difficulty of camshaft oil gallery processing again, to protect
Card manufacturability, can only choose an equalization point between system engine oil pressure and camshaft oil gallery diameter.Additionally, engine lubrication system
Lubricating oil pump be lubricated mainly by self-lubricating mode, that is, utilize from lubricating oil pump gap overflow not cleaned machine oil to machine oil
The bearing of pump is lubricated.
From the foregoing, the engine lubrication system of prior art is primarily present following shortcoming:First, engine oil pressure is non-adjustable
Section, and this mode for reducing engine oil pressure of pressure limiting valve draining can cause the waste of power output, to the various works of engine
The lubricant effect of different lubricant housings is also had a greatly reduced quality under condition, causes pulling even locking, causing key for important mating surface
The consequence of component damage;2nd, lubricating oil pump is lubricated using not cleaned machine oil, and the engine oil impurity is more, easily causes machine
Oil pump bearing wear, shortens the lubricating oil pump life-span;3rd, in order to obtain suitable engine oil pressure, it is necessary to pay raising camshaft oil gallery
The cost of difficulty of processing.
The content of the invention
The present invention provides a kind of engine lubrication system, to solve the oil pressure of engine lubrication system of the prior art
Power is unadjustable and lubricating oil pump carries out the more problem of engine oil impurity of self-lubricating, and engine lubrication system of the invention passes through
Using displacement-variable oil pump and pressure-control valve, increase feedback oil circuit and lubricant passage way, engine oil pressure is become adjustable, and
And it is capable of the machine oil of clean lubricating machine oil pump, so as to extend the life-span of lubricating oil pump.
To achieve the above object, the invention provides following technical scheme:
A kind of engine lubrication system, including displacement-variable oil pump, cleaner, oil sump, working connection, feedback oil circuit and
Lubricant passage way, the displacement-variable oil pump includes oil sucting cavity, oil-discharging cavity and feedback oil pocket, the oil sucting cavity and the oil sump
Connection, the oil-discharging cavity connects with the oil inlet of the cleaner, the oil-feed of the oil-out of the cleaner and the working connection
Mouth connection;The working connection branch forms feedback oil circuit and the lubricant passage way, and the feedback oil circuit is provided with pressure control
Valve processed, the oil-out of the feedback oil circuit is connected with the feedback oil pocket, and the lubricant passage way is communicated to the variable displacement machine
The bearing of oil pump.
Preferably, the pressure-control valve is magnetic valve, and the magnetic valve electrically connects with ECU, the ECU and revolution speed sensing
Device is electrically connected.
Preferably, the displacement-variable oil pump is two-stage variable displacement oil pump, and the magnetic valve is two-stage electromagnetic valve.
Preferably, the working connection branch forms tie point and the second branch road, the tie point and admission cam shaft
Oil duct is connected, and second branch road connects with exhaust cam slinger, the admission cam slinger and the exhaust cam shaft
Flow-limiting valve is equipped with oil duct.
Preferably, the lubricant passage way branches out a balance shaft lubricant passage way for being circulated to balance shaft.
Preferably, also including cooler, the cooler is connected with the working connection.
Preferably, the oil-discharging cavity connects the oil inlet of the cooler, and the oil-out of the cooler connects the filter
The oil inlet of clear device.
Preferably, also including temperature, pressure integrative sensor, the temperature, pressure integrative sensor and the working connection string
Connection.
Preferably, also including pressure limiting valve, the displacement-variable oil pump is in parallel with pressure limiting valve.
The beneficial effects of the present invention are:
Engine lubrication system of the invention, including displacement-variable oil pump, cleaner, oil sump, working connection, feedback oil
Road and lubricant passage way, the oil sucting cavity connection oil sump of displacement-variable oil pump, the oil-discharging cavity connection filtering of displacement-variable oil pump
The oil inlet of device, the oil-out of cleaner connects the oil inlet of working connection, and working connection branch forms feedback oil circuit and lubricant passage way,
Pressure-control valve is in series with feedback oil circuit, the oil-out for feeding back oil circuit connects the feedback oil pocket of displacement-variable oil pump, lubrication
Oil communication to the displacement-variable oil pump bearing.Compared to prior art, engine lubrication system of the invention can
Engine oil pressure is adjusted using displacement-variable oil pump and pressure-control valve, can be according to actual lubrication needs, control can
Become the outlet engine oil pressure of displacement oil pump, reduce power consumption, keep preferable lubricant effect, it is to avoid to engine key portion
The damage of part;And the present invention is communicated to the lubricant passage way of the bearing of displacement-variable oil pump by setting, clean using cleaner
Clean machine oil after net is lubricated to the bearing of lubricating oil pump, can prevent the bearing of impurity abrasion lubricating oil pump, can effectively improve
The life-span of lubricating oil pump.
On this basis, engine lubrication system of the invention is equal in admission cam slinger and exhaust cam slinger
Flow-limiting valve is set, it is not necessary to improve the difficulty of processing of camshaft oil gallery, it becomes possible to realize the reduction to the working connection pressure loss, protects
Demonstrate,prove the effective rate of utilization of energy.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of engine lubrication system provided in an embodiment of the present invention;
Fig. 2 is the partial structural diagram of engine lubrication system provided in an embodiment of the present invention;
Fig. 3 is the structural representation of displacement-variable oil pump provided in an embodiment of the present invention;
Fig. 4 is the using effect figure of pressure-control valve provided in an embodiment of the present invention;
Fig. 5 is the structural representation of admission cam shaft provided in an embodiment of the present invention.
Description of reference numerals:1- displacement-variable oil pumps, 2- pressure limiting valves, 3- pressure-control valves, 4- coolers, 5- filterings
Device, 6- displacement-variable oil pump drive chain automatic tensioners, 7- turbocharger, 8- temperature, pressure integrative sensors, 9- lives
Plug cooling nozzles, 10- crankshaft connecting rod lubrication oilholes, 11- automatic chain tensioners, 12- chain greasisng atomizers, 13- feedback oil
Road, 14- balance shaft lubricant passage ways, 15- lubricant passage ways, 16- admission cam slingers, 17- exhaust cam slingers are put in 18-
Formula V VT, 19- admission cam axle bearing, 20- exhaust cam axle bearings, 21- fuel pump lubricant passage ways, 22- flow-limiting valves, 23- oil bottom
Shell, 24- working connections, 25- engines, 26- speed probes, 27-ECU, 28- eccentric hoop, 29- swing springs, 30- feedback oil
Chamber.
Specific embodiment
In order that those skilled in the art is better understood when technical scheme, below in conjunction with accompanying drawing to this
Invention is further detailed.
As shown in figure 1, the embodiment of the present invention provides a kind of engine lubrication system, including displacement-variable oil pump 1, filtering
Device 5, oil sump 23, working connection 24, feedback oil circuit 13 and lubricant passage way 15, the displacement-variable oil pump 1 include oil sucting cavity, row
Oil pocket and feedback oil pocket 30, the oil sucting cavity connects with the oil sump 23, the oil inlet of the oil-discharging cavity and the cleaner 5
Connection, the oil-out of the cleaner 5 is connected with the oil inlet of the working connection 24;The branch of the working connection 24 forms described anti-
Feedback oil circuit 13 and the lubricant passage way 15, the feedback oil circuit 13 are provided with pressure-control valve 3, described to feed back the fuel-displaced of oil circuit 13
Mouth is connected with the feedback oil pocket 30, and the lubricant passage way 15 is communicated to the bearing of the displacement-variable oil pump 1.
The embodiment of the present invention is regulated and controled using displacement-variable oil pump 1 and pressure-control valve 3 to engine oil pressure, compared to
By the way of reducing engine oil pressure using relief valve draining in the prior art, the embodiment of the present invention can be according to the actual lubrication of system
Demand, is regulated and controled by pressure-control valve 3 to the outlet engine oil pressure of displacement-variable oil pump 1, not only increases oil pressure
The adjustable extent of power, makes the regulation to engine oil pressure in hgher efficiency, more intelligent, and it is defeated to avoid the waste of relief valve draining
Go out power, the drawbacks of reducing oil lubricating effect and cause the key components and parts of engine 25 to damage.
As shown in Fig. 2 in one embodiment of the invention, pressure-control valve 3 is preferably magnetic valve, the magnetic valve with
ECU27 is electrically connected, and the ECU27 is electrically connected with speed probe 26, and the reality that speed probe 26 detects engine 25 turns
Speed, and the size of the rotating speed is fed back into ECU27, ECU27 is judged engine speed, and then magnetic valve is controlled
System, subsequent magnetic valve adjusts the outlet engine oil pressure of displacement-variable oil pump 1, and outlet machine oil enters working connection 24, so circulation
Back and forth, the engine oil pressure of working connection 24 is finally made in OK range.
In the above-described embodiments, displacement-variable oil pump 1 is preferably two-stage variable lubricating oil pump, the two-stage variable lubricating oil pump
It is fixedly arranged on the cylinder body of engine 25, its structural representation refer to Fig. 3, the feedback oil pocket 30 of two-stage variable lubricating oil pump is connected instead
Feedback oil circuit 13, the machine oil in feedback oil circuit 13 enters compression swing spring 29 in feedback oil pocket 30, eccentric hoop 28 is moved,
Then cause offset to diminish, the output machine oil hydraulic in oil-discharging cavity is decreased, then export machine oil and entered by cleaner 5
Working connection 24, the engine oil pressure of working connection 24 is also decreased, and then a part of machine oil of working connection 24 is again by working connection
The 24 feedback oil circuits 13 for branching out, into feedback oil pocket 30, the reduction of the decrement of swing spring 29, eccentric hoop 28 is moved, offset
Become big, output oil pressure is raised, and is so moved in circles, by repeatedly regulation, be finally reached working connection 24 needs in an engine 25
The stable state worked under the constant oil pressure asked.In the present embodiment, the decrement of spring is adjusted by pressure-control valve 3
To realize the adjustment to the pressure of working connection 24, the engine oil pressure in working connection 24 is set flexibly to be changed according to actual demand.
In the above-described embodiments, magnetic valve is preferably two-stage electromagnetic valve, and two-stage electromagnetic valve coordinates two-stage variable lubricating oil pump, makes
With design sketch as shown in Figure 2 and Figure 4, it realizes that the operation controllable to the two-stage of engine oil pressure is as follows:
1) first according to the demand of engine 25, the demand oil pressure of setting different rotating speeds stage engine 25, i.e. working connection
24 engine oil pressure, for example:
Engine speed < N1During rpm, the demand pressure of engine 25 is the reality output pressure of lubricating oil pump;
N1Rpm≤engine speed < N2During rpm, the demand pressure of engine 25 is P1;
N2During rpm≤engine speed, the demand pressure of engine 25 is P2.
2) the two-stage variable process of engine oil pressure:
A. speed probe 26 detects the actual speed of engine 25 and feeds back to ECU27, and ECU27 sentences to rotating speed
It is disconnected, such as engine speed < N1Rpm, ECU27 are not controlled to two-stage variable lubricating oil pump pressure-control valve, pump reality output machine
The pressure of oil is the actual demand pressure under the rotating speed;
B. speed probe 26 detects the actual speed of engine 25 and feeds back to ECU27, and ECU27 sentences to rotating speed
It is disconnected, such as N1Rpm≤engine speed < N2Rpm, ECU27 are powered to two-stage variable lubricating oil pump pressure-control valve, produce electromagnetism
Valve power F1, the pressure for now feeding back oil circuit 13 is equal to the pressure of working connection 24 equal to P1, and magnetic valve spring power is F2, works as F1+P1
During >=F2, magnetic valve connects P mouthfuls, and because P mouthfuls connects with the feedback oil pocket 30 of two-stage variable lubricating oil pump, machine oil subsequently enters feedback
The compression swing spring 29 of oil pocket 30 adjusts the outlet pressure of lubricating oil pump, the pressure of working connection 24 is maintained P1;
C. speed probe 26 detects the actual speed of engine 25 and feeds back to ECU27, and ECU27 sentences to rotating speed
It is disconnected, such as N2During rpm≤engine speed, the engine oil pressure in lubricating system is excessive, and ECU27 is not to two-stage variable machine oil pump pressure
Control valve is controlled, and the pressure for now feeding back oil circuit 13 is equal to the pressure of working connection 24 equal to P1, because of P1 < F2, such as Fig. 4 institutes
Show, magnetic valve connects T mouthfuls, T mouthfuls due to magnetic valve connection is connected with oil sump 23, the machine oil in feedback oil circuit 13 can directly be let out
It is depressed into oil sump 23, so that swing spring 29 is uncompressed, is resetted, recovers the state that oil pressure is directly proportional to rotating speed,
Now the pressure of working connection 24 reaches P2, and as P2 >=F2, P mouthfuls is joined directly together with the feedback oil pocket 30 of two-stage variable lubricating oil pump,
Compression swing spring 29 carries out pressure regulation, the pressure of working connection 24 is maintained P2.
Engine lubrication system by above-described embodiment is visible, by two-stage electromagnetic valve and two-stage variable lubricating oil pump, can
Two-stage regulation is carried out with the engine oil pressure effectively to working connection 24.
In an embodiment of the present invention, the branch of the working connection 24 forms tie point and the second branch road, described first
Road is connected with admission cam slinger 16, and second branch road is connected with exhaust cam slinger 17, refer to Fig. 1 and Fig. 5 institutes
Show, be equipped with flow-limiting valve 22 in the admission cam slinger 16 and the exhaust cam slinger 17, flow-limiting valve 22 passed through
It is full of to press-fit and is fixed in camshaft oil gallery, flow-limiting valve 22 is lowered into cam by changing the actual internal area of camshaft oil gallery
Flow in slinger, plays metering function, after increasing pressure limiting valve 2, can not change admission cam slinger 16 and exhaust
On the premise of the diameter of camshaft oil gallery 17, the pressure loss of working connection 24 is reduced, it is ensured that the effective rate of utilization of energy.Above-mentioned
On the basis of structure, conventional admission cam slinger 16 and institute exhaust cam slinger 17 are in series with middle VVT18, machine
After middle VVT18 is flowed through, can also be circulated to both admission cam axle bearing 19 and exhaust cam axle bearing 20 pairs is carried out oil
Lubrication, subsequent machine oil can also be circulated to fuel pump lubricant passage way 21 to be continued to play the effect such as lubrication.
In the engine lubrication system of the embodiment of the present invention, the lubricant passage way 15 branches out one and is circulated to balance shaft
Balance shaft lubricant passage way 14, realize lubrication to balance shaft and cooling, prevent balance shaft from the life-span is reduced because of dry friction, be flat
Weighing apparatus axle provides good working environment.
Further, the engine lubrication system of the embodiment of the present invention also include cooler 4, the cooler 4 with it is described
Working connection 24 is connected, and the machine oil for entering working connection 24 is lowered the temperature and be buffered, is easy to drop the machine oil of working connection 24
Pressure.
On the basis of said structure, the oil-discharging cavity connects the oil inlet of the cooler 4, and the cooler 4 goes out
Hydraulic fluid port connects the oil inlet of the cleaner 5, and cooler 4 and cleaner 5 are arranged at the front end of working connection 24, and the two is mutual
Coordinate and the machine oil for entering working connection 24 is lowered the temperature, buffered and cleaned, be conducive to improving the engine oil quality in working connection 24, make
Working connection 24 and subsequently needs the parts being lubricated obtain preferably lubricate and good working condition.
Further, the engine lubrication system of the present embodiment also includes temperature, pressure integrative sensor 8, the temperature pressure
Power integrative sensor 8 is connected with the working connection 24, and temperature, pressure integrative sensor 8 can be realized to the machine oil in working connection 24
Temperature and pressure carry out real-time monitoring, it is ensured that the temperature and pressure of the machine oil of working connection 24 is in rational scope.Specifically
Ground, between cleaner 5 and temperature, pressure integrative sensor 8, displacement-variable oil pump can be also sequentially connected in series on working connection 24
Drive chain automatic tensioner 6 and turbocharger 7, after temperature, pressure integrative sensor 8, piston are additionally flowed through on working connection 24
Cooling nozzles 9, crankshaft connecting rod lubrication oilhole 10, automatic chain tensioner 11 and chain greasisng atomizer 12, with to engine 25
More multiple component be lubricated, make the engine lubrication system function of the present embodiment more sound, system is more stable and real
With.
As shown in figure 1, the engine lubrication system of the embodiment of the present invention also includes pressure limiting valve 2, the variable displacement machine oil
Pump 1 is preferably in parallel with pressure limiting valve 2, in the operating mode of the low-temperature cool starting of engine 25, because subzero engine oil viscosity is higher, even if turning
Speed is very low, can also produce high pressure, at this moment excess pressure being let out into oil sump 23 by pressure limiting valve 2, it is ensured that engine 25
Sealing, after oil temperature rises, pressure limiting valve 2 no longer works, and changes and does displacement-variable oil pump 1 and the regulation pressure of pressure-control valve 3, limit
Pressure valve 2 plays a role respectively with displacement-variable oil pump 1 and pressure-control valve 3 in the slow-speed of revolution and high-revolving operating mode, can be more
Pressure in the extensive range of speeds to machine oil is adjusted, and further increases the pressure regulation ability of whole system.
Construction of the invention, feature and action effect, above institute is described in detail according to the embodiment shown in schema above
Only presently preferred embodiments of the present invention is stated, but the present invention is not to limit practical range shown in drawing, it is every according to structure of the invention
Want made change, or be revised as the Equivalent embodiments of equivalent variations, still without departing from specification and diagram covered it is spiritual when,
All should be within the scope of the present invention.
Claims (9)
1. a kind of engine lubrication system, including displacement-variable oil pump (1), cleaner (5), oil sump (23), working connection
(24), feedback oil circuit (13) and lubricant passage way (15), it is characterised in that:
The displacement-variable oil pump (1) includes oil sucting cavity, oil-discharging cavity and feedback oil pocket (30), the oil sucting cavity and the oily bottom
Shell (23) is connected, and the oil-discharging cavity connects with the oil inlet of the cleaner (5), the oil-out of the cleaner (5) with it is described
The oil inlet connection of working connection (24);
Working connection (24) branch forms feedback oil circuit (13) and the lubricant passage way (15), feedback oil circuit (13)
Pressure-control valve (3) is provided with, the oil-out of feedback oil circuit (13) is connected with feedback oil pocket (30), the lubricating oil
Road (15) is communicated to the bearing of the displacement-variable oil pump (1).
2. engine lubrication system according to claim 1, it is characterised in that the pressure-control valve (3) is magnetic valve,
The magnetic valve is electrically connected with ECU (27), and the ECU (27) is electrically connected with speed probe (26).
3. engine lubrication system according to claim 2, it is characterised in that the displacement-variable oil pump (1) is two
Level displacement-variable oil pump, the magnetic valve is two-stage electromagnetic valve.
4. engine lubrication system according to claim 1, it is characterised in that working connection (24) branch forms first
Branch road and the second branch road, the tie point are connected with admission cam slinger (16), second branch road and exhaust cam shaft
Oil duct (17) is connected, and flow-limiting valve is equipped with the admission cam slinger (16) and the exhaust cam slinger (17)
(22)。
5. engine lubrication system according to claim 1, it is characterised in that the lubricant passage way (15) branches out
It is circulated to the balance shaft lubricant passage way (14) of balance shaft.
6. engine lubrication system according to claim 1, it is characterised in that also including cooler (4), the cooler
(4) connected with the working connection (24).
7. engine lubrication system according to claim 6, it is characterised in that the oil-discharging cavity connects the cooler
(4) oil inlet, the oil-out of the cooler (4) connects the oil inlet of the cleaner (5).
8. engine lubrication system according to claim 1, it is characterised in that also including temperature, pressure integrative sensor
(8), the temperature, pressure integrative sensor (8) is connected with the working connection (24).
9. the engine lubrication system according to claim any one of 1-8, it is characterised in that also including pressure limiting valve (2), institute
State displacement-variable oil pump (1) in parallel with pressure limiting valve (2).
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