CN102869858A - Method for operating an internal combustion engine having a multi-stage oil pump - Google Patents

Method for operating an internal combustion engine having a multi-stage oil pump Download PDF

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Publication number
CN102869858A
CN102869858A CN2011800231301A CN201180023130A CN102869858A CN 102869858 A CN102869858 A CN 102869858A CN 2011800231301 A CN2011800231301 A CN 2011800231301A CN 201180023130 A CN201180023130 A CN 201180023130A CN 102869858 A CN102869858 A CN 102869858A
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CN
China
Prior art keywords
oil
oil pressure
combustion engine
pressure level
internal
Prior art date
Application number
CN2011800231301A
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Chinese (zh)
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CN102869858B (en
Inventor
D.温德里希
A.瓦赫滕多夫
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大众汽车有限公司
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Filing date
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Priority to DE201010019933 priority Critical patent/DE102010019933A1/en
Priority to DE102010019933.8 priority
Application filed by 大众汽车有限公司 filed Critical 大众汽车有限公司
Priority to PCT/EP2011/002164 priority patent/WO2011141130A1/en
Publication of CN102869858A publication Critical patent/CN102869858A/en
Application granted granted Critical
Publication of CN102869858B publication Critical patent/CN102869858B/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00Pressure lubrication
    • F01M1/02Pressure lubrication using lubricating pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00Pressure lubrication
    • F01M1/16Controlling lubricant pressure or quantity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00Pressure lubrication
    • F01M1/18Indicating or safety devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/3445Details relating to the hydraulic means for changing the angular relationship

Abstract

The invention relates to a method for operating an internal combustion engine, wherein in an oil circuit (14) of the internal combustion engine, in particular for forced-feed lubrication, a first oil pressure stage having a first minimum and maximum oil pressure level and at least one second oil pressure stage having a second minimum and maximum oil pressure level are alternatively produced by an oil pump (12), wherein the first minimum oil pressure level is less than or equal to the second minimum oil pressure level and the first maximum oil pressure level is less than the second maximum oil pressure level, wherein a camshaft (16) of the internal combustion engine is hydraulically adjusted by an actuator (18) by means of an oil pressure from the oil circuit (14) of the internal combustion engine. During the adjustment, a first adjustment speed of the camshaft (16) is set by the actuator (18) while the first oil pressure stage is produced by the oil pump (12), wherein a second adjustment speed of the camshaft (16) is set by the actuator (18) for at least one second oil pressure stage while the second oil pressure stage is produced by the oil pump (12), wherein at least one difference between the first and at least one second adjustment speed is determined, wherein a switching mechanism (20) of the oil pump (12) for switching between the oil pressure stages is classified as being in order if a magnitude of the difference is greater than or equal to a predetermined difference value, and the switching mechanism (20) of the oil pump (12) for switching between the oil pressure stages is classified as defective if a magnitude of the difference is less than a predetermined difference value.

Description

Be used for the method that operation has the internal-combustion engine of control system of multistage oil pump

Technical field

According to claim 1, preamble described, the present invention relates to a kind of method for operation of combustion engine, wherein in the oil circulation of internal-combustion engine, in the lubricated oil circulation of pressures cycle, produce alternatively the first oil pressure level with the first minimum oil pressure level and maximum oil voltage levels and at least one has the second oil pressure level of the second minimum oil pressure level and maximum oil voltage levels by oil pump, wherein the first minimum oil pressure level is less than or equal to the second minimum oil pressure level, and the first maximum oil voltage levels is less than the second maximum oil voltage levels, and wherein the camshaft of internal-combustion engine is hydraulically regulated by the oil pressure that the oil from internal-combustion engine circulates by final controlling element.

Background technique

Internal-combustion engine has mechanically operated oil pump usually.In some applications, by corresponding controlling device in other words switching mechanism can utilize this oil pump with different oil pressure levels in other words different span move two or more and arbitrarily downgrade, in the running state change of oil pressure described in described the arbitrarily downgrading according to internal-combustion engine.Oil pump at this device with mechanism to adjust oil pressure.Internal-combustion engine does not need identical high oil pressure in each performance curve point.The usually oil pressure energy is enough to be reduced towards the slow-speed of revolution and low load.Only just switching to higher second when surpassing corresponding, predetermined load threshold and rotary speed threshold value arbitrarily downgrades.Therefore oil pressure mates with the current demand of internal-combustion engine.The power consumpiton of this two-stage or control system of multistage oil pump is less with respect to the oil pump of single-stage.The problem of the oil pump of described two-stage is the diagnosis to controlling mechanism.For this reason known, for arbitrarily downgrading, each uses independent oil pressure sensor.Described two-stage or control system of multistage oil pump are therefore take at least one additional pressure transducer as precondition.This additional sensor is take corresponding cost and essential structure space as precondition.

For example known by document DE 10 2,005 050 775 A1, by the pressure monitor sensor oil pressure.Be used for the engine oil circulation of internal-combustion engine, pressure transducer spatially is integrated in the hydraulic unit.Can cancel thus the pressure switch that other are generally used for monitoring the pressure minimum of existence, because the output signal of integrated pressure transducer can be used for pressure monitor.

By the known a kind of internal-combustion engine of document DE 198 25 288 A1, wherein camshaft adjuster (final controlling element that is used for the adjustment cam axle) has the aerofoil profile regulator (Fl ü gelsteller) of hydraulic pressure, and described aerofoil profile regulator is with respect to the crankshaft rotation camshaft and for this reason by loading the engine oil that circulates from engine oil by electrically-energized hydrovalve.

Known by document US 5 529 023, according to the Functional Capability of the adjusting angle of camshaft adjuster monitoring camshaft adjuster.If do not reach predetermined adjusting angle, so just suppose that fault has occured camshaft adjuster.Yet when the oil pressure in the oil circulation of supplying with camshaft adjuster during less than predetermined value, stop this monitoring.In this case, camshaft adjuster also can stop.

Summary of the invention

Task of the present invention is, simplifies about member method cost, the above-mentioned type and improves simultaneously monitoring to the Functional Capability of the switching mechanism of oil pump.

Task according to the present invention solves by having method feature claimed in claim 1, the above-mentioned type.Favourable design proposal of the present invention is described in other claims.

For this reason according to of the present invention, stipulate in the method for the above-mentioned type, the first governing speed of described camshaft is determined by described final controlling element, and described the first oil pressure level is produced by described oil pump, wherein at least one the second oil pressure level, the second governing speed of described camshaft is determined by described final controlling element, and described the second oil pressure level is produced by described oil pump, determine that wherein between described the first governing speed and at least one the second governing speed at least one is poor, wherein when the number of described difference is equal to, or greater than predetermined difference, described oil pump, the switching mechanism that is used for changing between described oil pressure level is included into normal grade; And when the number of described difference during less than predetermined difference, switching mechanism described oil pump, that be used for changing between described oil pressure level is included into failure level.

Its advantage is, in the situation that does not have additional hardware, only utilizes the Functional Capability of the switching mechanism of existing Sensor monitoring oil pump, and wherein said monitoring is irrelevant with the tolerance about the valve of oil viscosity, oil pump, final controlling element or final controlling element in the oil circulation.

To the Functional Capability of the switching mechanism of oil pump, do not having in the balanced situation with the irrelevant monitoring of the running state of internal-combustion engine, for example realized in the following manner by fluctuation oil pressure, that depend on rotating speed or depend on load: in the identical running state of described internal-combustion engine, determine described the first governing speed and at least one second governing speed.

Additional monitoring itself to the Functional Capability of oil pump realizes in the following manner,, is produced by described oil pump in the first oil pressure level described in the running state process of described internal-combustion engine by pressure monitor sensor at oil pressure described in the running state of described internal-combustion engine.

Positive diagnosis concerning the switching mechanism of oil pump realizes for different oil pressure levels in the following manner: after determining described the first governing speed, the current running state of described oil pump and internal-combustion engine irrespectively is transformed at least one second oil pressure level, adjustment cam axle and determines the second governing speed at this.

Concerning the check of the switching mechanism of oil pump in the state of the restriction of internal-combustion engine, realizing in the following manner the different oil pressure levels: determine described the first governing speed and the second governing speed at least one the predetermined operation point at described internal-combustion engine, wherein irrespectively change corresponding oil pressure level and regulate described camshaft with described operation point.

In order to keep the harmful matter limiting value of internal-combustion engine, so select at least one predetermined operation point of internal-combustion engine, thereby so that in exhaust the raising of discharge of poisonous waste minimize.

Description of drawings

Next with reference to the accompanying drawings the present invention is explained in detail.Accompanying drawing illustrates:

Fig. 1 is the schematic block diagram for the internal-combustion engine of implementing the method according to this invention;

Fig. 2 is the flow chart preferred embodiment of the method according to this invention; And

Fig. 3 is the performance curve figure of internal-combustion engine.

Embodiment

The present invention relates to a kind of internal-combustion engine, as schematically illustrated among Fig. 1, described internal-combustion engine has engine cylinder-body 10, oil pump 12 and is configured to be particularly useful for the lubricated engine oil circulation means 14 of pressures cycle.Adjustable hydraulic unit is connected to for the lubricated engine oil circulation means 14 of pressures cycle, and the necessary operation fluid for it is handled of described hydraulic unit provides by the engine oil of engine oil circulation means 14.Fluid flow, the adjusting of namely flowing through the engine oil of hydraulic unit realize by the electric regulated signal of electric control device 22.A kind of so adjustable hydraulic unit is the camshaft adjuster 18 camshaft 16, hydraulic pressure that has hydrovalve for adjusting, and described hydrovalve for example is configured to solenoid valve.In other words, the final controlling element for the adjustment cam axle is integrated into the engine oil circulation means.

The oil pressure that exists in the engine oil circulation means is available in engine oil circulation means 14 by mechanically operated oil pump 12.Described oil pump 12 has switching mechanism 20, in order to change between different oil pressure levels.At this first oil pressure level is set, oil pressure is according to the first area Wave of running state between the first minimum oil pressure value (oil pressure level) and the first maximum oil pressure value (oil pressure level) of internal-combustion engine in described the first oil pressure level.In addition, at least one second oil pressure level is set, oil pressure is according to the second area Wave of running state between the second minimum oil pressure value (oil pressure level) and the second maximum oil pressure value (oil pressure level) of internal-combustion engine in described the second oil pressure level.The said first minimum oil pressure value is less than or equal to the described second minimum oil pressure value, and the described first maximum oil pressure value is less than the described second maximum oil pressure value.For the first oil pressure level, oil pressure sensor 24 is set with the monitoring oil pressure.

According to the size of oil pressure with different rate adaptation camshafts.Self-regulating angular velocity is interrelated at this and oil pressure.Described angular velocity is measurable, and method is to follow the solenoid valve camshaft that triggers to greatest extent camshaft adjuster 18 to turn over continuously enough regulation ranges.Described angular velocity additionally also depends on engine speed and oil temperature, and should revise by them.Described angular velocity is in device that utilization can use usually in engine control can be effectively and in the scope of measuring reliably.

The regulation according to the present invention, the angular velocity of adjustment cam axle is with switching mechanism 20 monitoring oil pump 12, that be used for the different oil pressure level.Because especially relevant with oil viscosity, pump characteristics, camshaft adjuster 18 and solenoid valve tolerance chain not only can not determined angular velocity in the second oil pressure level by remaining oil pressure sensor monitoring.Or rather, the regulation according to the present invention, also in the first oil pressure level, that is to say the angular velocity of determining in other words that two middle measurements of arbitrarily downgrading camshaft is regulated.If the difference of angular velocity is so remarkable, that is to say to be greater than or equal to predetermined threshold value, can set out thus so, so that the switching mechanism 20 of oil pump 12 is worked in order.The first lower oil pressure level is by pressure monitor sensor.Monitoring second is arbitrarily downgraded, and method is analyzed in different oil pressure levels the above-mentioned comparison of camshaft adjuster 18, the governing speed that records.If the speed that camshaft is regulated is consistent in two oil pressure levels, can set out thus so, so that the switching mechanism 20 of oil pump 12 is not according to sequential working.Oil pump 12 only can be regulated in other words oil pressure level of pressure in this case.

A kind of the method according to this invention preferred embodiment in, in constant operation point, at first move the first oil pressure level, and then move the second oil pressure level.Term " constant operation point " is in the running state of this expression internal-combustion engine, in this running state, the second higher oil pressure level one of them not necessarily, and camshaft regulate neither be necessary.In other words, described oil pressure level and camshaft are regulated the current running state that does not rely on internal-combustion engine and are regulated in other words change.In two were arbitrarily downgraded, the governing speed that measurement is determined in other words and the analysis camshaft is regulated was determined difference in other words.Get rid of by this way for oil temperature with for the dependence of load speed point.On not being that the impact of the discharging of optimum camshaft location is paid close attention to by the suitable selection to constant operation point in measuring phase.

Be used for the second oil pressure level the second oil pressure sensor the cost inferior position in other words the structure space inferior position can be subdued because whether arrive second for monitoring arbitrarily downgrade, do not need the oil pressure sensor that adds.Can reach so a kind of compromise cost (Kostenneutralit t), because set up diagnosis to the second oil pressure level by the actuator in the internal-combustion engine Already in and sensor.

In Fig. 2, for example show the flow chart preferred embodiment of the method according to this invention.The initial conditions of check the method in first step 100.For example whether the temperature of the temperature of proof load, rotating speed, freezing mixture and engine oil is in the predetermined scope.If one of them does not meet this situation above-mentioned parameter, so do not implement to the diagnosis of camshaft and via the first branch 102 " no " again redirect get back to step 100.

If all certified parameters all are in the predetermined scope, " be " to jump to second step 106 " oil pump is in the 1=that arbitrarily downgrades〉request camshaft specified step " via the second branch 104 so.In this second step 106, described oil pump so moves, thereby so that oil pump provides first to arbitrarily downgrade and the adjustment cam axle.In third step 108 " measure camshaft ", the governing speed 1 of camshaft is determined as being used for the first angular velocity omega of arbitrarily downgrading [°/ms] when regulating.Described oil pump of operation like this in the 4th step 110 " oil pump is in the 2=that arbitrarily downgrades〉request the specified step of camshaft (Anforderung Nockenwellen Sollsprung) ", thereby so that oil pump provides second to arbitrarily downgrade and readjust camshaft in the oil circulating system of internal-combustion engine, the pressure that wherein draws in the oil circulating system of internal-combustion engine is different from the corresponding pressure during first arbitrarily downgrades.Determine as being used for the second angular velocity omega of arbitrarily downgrading [°/ms] when regulating in the governing speed 2 of the 5th step 112 " measure camshaft " convexity wheel shaft.Whether check in the 6th step 114 " governing speed 2〉governing speed 1 " is used for the second governing speed of arbitrarily downgrading 2 greater than being used for the first governing speed of arbitrarily downgrading 1.As long as oil pump be used in other words the adjustment component normal operation arbitrarily downgrade and the oil circulating system of internal-combustion engine second arbitrarily downgrade middle generation arbitrarily downgrade than first in higher pressure, governing speed 2 must be greater than governing speed 1 so.If therefore so just indicate on the contrary the in other words conversion between arbitrarily downgrading of oil pump of normal operation.If check in step 114 " governing speed 2〉governing speed 1? " the result be "Yes", so therefore jump to the 7th step 116 from the 6th step 114 via the 3rd branch 118 " detect and finish, the adjustment component of arbitrarily downgrading that is used for oil pump is normal ".But if not this situation, jump to the 8th step 122 via the 4th branch 120 " no " so " detect and finish, the adjustment component of arbitrarily downgrading that is used for oil pump is undesired ".

Fig. 3 illustrates the performance curve of internal-combustion engine, has wherein described the rotating speed of internal-combustion engine and has described in other words load of engine torque M at vertical shaft 202 at horizontal axis 200.Draw the operation area for internal-combustion engine in this so-called " load-rotation speed characteristic ", described operation area is limited by the first image 204, horizontal axis 200 and vertical shaft 202.Inner first characteristic curve zone 206 that exists in this operation area of internal-combustion engine can be moved in described the first characteristic curve zone that first of oil pump is arbitrarily downgraded and second arbitrarily downgrades.The 206 inner second characteristic curve zones 208 that exist in described the first characteristic curve zone, in described the second characteristic curve zone, can carry out above-mentioned diagnostic method, wherein must satisfy following precondition: must allow two and arbitrarily downgrade for this reason, the position step of camshaft must be little on the impact of exhaust, and the position step of camshaft must be little on the impact of the rideability of the Motor Vehicle that is equipped with internal-combustion engine.All these all satisfy in described the second characteristic curve zone 208.The remaining part of removing the first characteristic curve zone 206 of operation area is the 3rd characteristic curve zone 210, only can move second in described the 3rd characteristic curve zone and arbitrarily downgrade.For this reason, described the 3rd characteristic curve zone 210 is not suitable for above-mentioned diagnostic method.

Reference numerals list

10 engine cylinder-bodies

12 oil pumps

14 oil circulations

16 camshafts

18 final controlling element

20 oil pumps, be used for the switching mechanism between the oil pressure level, change

22 electric control devices

24 oil pressure sensors

100 first steps: check is used for the initial conditions of the method

102 first branches: " no "

104 second branches: " being "

106 second steps: oil pump is in the 1=that arbitrarily downgrades〉the specified step of request camshaft

108 third steps: measure camshaft

110 the 4th steps: oil pump is in the 2=that arbitrarily downgrades〉the specified step of request camshaft

112 the 5th steps: measure camshaft

114 the 6th steps: governing speed 2〉governing speed 1

116 the 7th steps: detect and finish, the adjustment component of arbitrarily downgrading that is used for oil pump is normal

118 the 3rd branches " are "

120 the 4th branches: " no "

122 the 8th steps: detect and finish, the adjustment component of arbitrarily downgrading that is used for oil pump is undesired

200 horizontal axis: rotation speed n

202 vertical shaftes: engine torque M

204 first images

206 first characteristic curves zone

208 second characteristic curves zone

210 the 3rd characteristic curves zone

Claims (6)

1. the method that is used for operation of combustion engine, wherein in the circulation of the oil of described internal-combustion engine, in particular in the lubricated oil circulation of pressures cycle, produce alternatively the first oil pressure level with the first minimum oil pressure level and maximum oil voltage levels and at least one has the second oil pressure level of the second minimum oil pressure level and maximum oil voltage levels by oil pump, the wherein said first minimum oil pressure level is less than or equal to the described second minimum oil pressure level; And described the first maximum oil voltage levels is less than described the second maximum oil voltage levels, the camshaft of wherein said internal-combustion engine is hydraulically regulated by the oil pressure that the oil from internal-combustion engine circulates by final controlling element, it is characterized in that, the first governing speed of described camshaft is determined by described final controlling element, and described the first oil pressure level is produced by described oil pump; Wherein at least one the second oil pressure level, the second governing speed of described camshaft is determined by described final controlling element, and described the second oil pressure level is produced by described oil pump, determine that wherein between described the first governing speed and at least one the second governing speed at least one is poor, wherein when the number of described difference is equal to, or greater than predetermined difference, switching mechanism described oil pump, that be used for changing is included into normal grade between described oil pressure level; And when the number of described difference during less than predetermined difference, switching mechanism described oil pump, that be used for changing is included into failure level between described oil pressure level.
2. by method claimed in claim 1, it is characterized in that, in the identical running state of described internal-combustion engine, determine described the first governing speed and at least one second governing speed.
3. by at least one described method in the claims, it is characterized in that,, produced by described oil pump in the first oil pressure level described in the running state process of described internal-combustion engine by pressure monitor sensor at oil pressure described in the running state of described internal-combustion engine.
4. by at least one described method in the claims, it is characterized in that, after determining described the first governing speed, the current running state of described oil pump and internal-combustion engine irrespectively is transformed at least one second oil pressure level, adjustment cam axle and determines described the second governing speed at this.
5. by at least one described method in the claims, it is characterized in that, in at least one predetermined operation point of described internal-combustion engine, determine described the first governing speed and described the second governing speed, wherein irrespectively change corresponding oil pressure level and regulate described camshaft with described operation point.
6. by method claimed in claim 5, it is characterized in that, so select at least one predetermined operation point of described internal-combustion engine, thereby so that in exhaust the raising of discharge of poisonous waste minimize.
CN201180023130.1A 2010-05-08 2011-05-02 Method for operating an internal combustion engine having a multi-stage oil pump CN102869858B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE201010019933 DE102010019933A1 (en) 2010-05-08 2010-05-08 Method for operating an internal combustion engine with a multistage oil pump
DE102010019933.8 2010-05-08
PCT/EP2011/002164 WO2011141130A1 (en) 2010-05-08 2011-05-02 Method for operating an internal combustion engine having a multi-stage oil pump

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CN102869858A true CN102869858A (en) 2013-01-09
CN102869858B CN102869858B (en) 2014-12-10

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EP (1) EP2569519B1 (en)
CN (1) CN102869858B (en)
DE (1) DE102010019933A1 (en)
WO (1) WO2011141130A1 (en)

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CN107989786B (en) * 2017-11-25 2019-07-05 蚌埠市鑫源机电设备有限公司 A kind of pump operation regulator control system of subregion detection

Also Published As

Publication number Publication date
CN102869858B (en) 2014-12-10
DE102010019933A1 (en) 2011-11-10
WO2011141130A1 (en) 2011-11-17
EP2569519A1 (en) 2013-03-20
EP2569519B1 (en) 2016-02-10

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