CN104047731A - Method for operating electric fuel pump - Google Patents
Method for operating electric fuel pump Download PDFInfo
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- CN104047731A CN104047731A CN201410087232.5A CN201410087232A CN104047731A CN 104047731 A CN104047731 A CN 104047731A CN 201410087232 A CN201410087232 A CN 201410087232A CN 104047731 A CN104047731 A CN 104047731A
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- fuel pump
- limit value
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- 239000000446 fuel Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 230000001419 dependent effect Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims 1
- 238000005507 spraying Methods 0.000 description 36
- 238000013461 design Methods 0.000 description 15
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000010587 phase diagram Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000013372 meat Nutrition 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000001994 activation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3082—Control of electrical fuel pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2048—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit said control involving a limitation, e.g. applying current or voltage limits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2051—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using voltage control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2058—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using information of the actual current value
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
- F02D2041/226—Fail safe control for fuel injection pump
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrostatic Spraying Apparatus (AREA)
Abstract
本发明涉及一种用于运行电燃料泵的方法，尤其是用于运行喷射设备的电燃料泵的方法，其中，为施加在电燃料泵上的电压预设最大限值（48），为流过电燃料泵的电流预设最大限值（62），其中，测量电燃料泵需要的电流的值（62），其中，对于电流的测量到的值（62）超过预设的最大限值（64）的情况，为施加在电燃料泵上的电压预设的最大限值（48）取决于电流的测量到的值（62）降低。
The invention relates to a method for operating an electric fuel pump, in particular an electric fuel pump of an injection system, wherein a maximum limit value ( 48 ) is preset for the voltage applied to the electric fuel pump, for the flow A preset maximum limit value (62) for the electric current of the fuel pump, wherein the value (62) of the current required by the electric fuel pump is measured, wherein the measured value (62) for the current exceeds the preset maximum limit value ( In the case of 64), the preset maximum limit value (48) for the voltage applied to the electric fuel pump is reduced depending on the measured value (62) of the current.
Description
Technical field
The present invention relates to a kind of for moving method and the control gear of electric petrolift.
Background technique
The function that is used for the spraying equipment of internal-combustion engine can be controlled by control gear.Can use the control of so-called EDC(Electronic Diesel Control(electronic diesel for diesel oil being sprayed in the firing chamber of internal-combustion engine)) control gear.The output stage of EDC control gear is design so conventionally, the electric current demand of the adjusting member of spraying equipment also can be no problem under disadvantageous running boundary condition be met.In addition be provided with a module for monitoring, utilize this module in the time breaking down, for example, can cut off output stage in short circuit or when overheated.
The adjusting member of spraying equipment can be designed as electric petrolift (EKP), this electricity petrolift is considering all default boundary conditionss, only to have a restricted electric current demand in the time of normal operation, but this electric current demand can raise for example under exception.But under exception, for example, when due to fuel contamination especially severe or because fuel meat clogs, (Versulzung) to cause pressure drop to obtain more, electric current demand acutely rises.In FPC(Feed Pump Control (supply pump control)) in equipment, regulate the rail pressure of spraying equipment by electric petrolift (EKP), thus, the electric current demand of electric petrolift depends on the operation point of spraying equipment to a great extent.
In this spraying equipment with fuel storage device (rail altogether), the pressure of fuel also depends on the amount of the fuel of being carried by the petrolift that is for example designed to high-pressure service pump, and depends on the pressure of fuel on the input end of petrolift and for moving the required electric current of electric petrolift.But, on petrolift for the required voltage in operation point is in different examples and depend on that environmental conditions has strong variation.Therefore the design of spraying equipment needs the large voltage range of the permission of electric petrolift, but this is under exception, for example obtain when more at pressure drop, for example, on fuel filter, may cause with respect to obvious electric current that improve, on petrolift under normal circumstances.But it is relative higher that the design of the output stage of electric petrolift is compared cost for the electric current of this maximum possible within spraying equipment and the design of the electric current only occurring under normal circumstances.
Open source literature DE 10 2,010 030 872 A1 have described a kind of for determining the method for correction indicatrix of the indicatrix of adjusting spraying equipment, wherein, revise indicatrix and comprise the indicatrix that records at least one deviation with respect to theory characteristic curve.At this, at least one deviation comprises a gross tolerance of at least two parts of the spraying equipment of effect characteristics curve.
Summary of the invention
Under this background, propose to have a kind of method and a kind of control gear of feature described in independent claims.Other design proposal of the present invention is by drawing in dependent claims and specification.
Utilize the present invention the levels of current of electric petrolift (EKP) of the parts that are designed to spraying equipment to be defined as to a maximum permissible value and to protect thus this output stage by the design of output stage.
Utilize electric petrolift transfer the fuel amount in the fuel storage device (rail altogether) of spraying equipment, wherein this amount also depends on the current value that is applied to the magnitude of voltage on petrolift and/or flows through petrolift.Pass through the pressure (rail pressure) of the fuel in all right fuel metering storage of carried amount and electric current and/or voltage.Therefore can voltage be used as to the adjustment parameter that regulates pressure in design proposal.Alternatively or addedly, the pressure of fuel can depend on that at least another regulator, for example pressure regulator valve regulate.Be provided with codomain for voltage, the logical superpotential minimum of this codomain and threshold limit value define.The current value of voltage in the operation point of petrolift is limited to this codomain by limitation function unit (Begrenzungsfunktion) in design proposal.
In addition propose, also can also exert one's influence to the current value that flows through petrolift by the current value of fuel pressure.This may cause: current value depends on pressure rise and exceedes the threshold limit value default for electric current.In this case, the codomain of voltage, normally the threshold limit value of voltage can reduce the numerical value that can be depending on the corresponding current measured value of electric current by having the closed regulating loop of reduction functional unit (Reduktionsfunktion) in the design proposal of this method, until the current value of electric current is less than for this reason default threshold limit value.In addition, the threshold limit value of voltage can depend on that the voltage that records predetermined gradient in time reduces and thereby depend on that the variation in time of voltage reduces.
At this, limit based on that record, that carried by electric petrolift or the needed electric current that flows through electric petrolift the voltage being applied on electric petrolift.Conventionally at this, voltage end value is restricted to one by threshold limit value and the defined codomain of minimum limit value by limitation function unit.At this, the voltage codomain of being scheduled to by limitation function unit can reduce continuously and based on closure, for checking that the regulating loop whether current value recording is greater than limit value is accurately set to current required codomain, wherein reduces the threshold limit value of voltage conventionally.Thus, the power of spraying equipment remains in maximum scope of permitting and obtains.At this, even if also can guarantee to use the spraying equipment of internal-combustion engine the less desirable large pressure drop of fuel and therefore can use the Motor Vehicle that will drive thus in the low tension loop of spraying equipment.
In the time implementing this method, the voltage end value in original state is passed limitation function unit and is set to threshold limit value and is therefore limited.In addition, in the time flowing through the electric current of electric petrolift and exceed default limit value, activate and reduce functional unit, wherein this threshold limit value for example can be determined by the design of output stage.
Reduce functional unit (Reduktionsfunktion) and first obtain the current value of voltage.In addition; start and reduce functional unit and based on voltage predetermined gradient in time; conventionally the voltage based on recording and/or the maximum voltage limit value based on having reduced; reduce maximum voltage limit value from this maximum voltage limit value by reducing functional unit; wherein, this gradient also can depend on the current value that records and/or the variation in time of electric current.
Also there is such possibility: exceed in short time the situation of current limit, for example occurring as it, can be tolerated in the dynamic operation of spraying equipment and/or petrolift.In this case, after electric current exceedes limit value, before activating reduction functional unit, wait for a specific time period, this time period for example can be measured and/or be monitored by timing module.If when the current value of pre-test drops under limit value during this time period, do not activate so reduction functional unit, timing module stopped and it is reset in this external this time period.
Also activate integrator in order to reduce magnitude of voltage, this integrator is designed for, and the threshold limit value that makes voltage reduces like this from current voltage value, until the value of electric current arrives the scope of the permission under default limit value again.Once there is this situation, close integrator, wherein, by the limit setting of the codomain to voltage to reached threshold limit value.If current value raise and outside the scope of permission, reactivates integrator and continue to reduce voltage limit value a more late moment.At this, use closed regulating loop, but this regulating loop depend on current value be within the range of permission or outside temporarily enabling only.
The adjusting of the pressure of the fuel in the fuel storage device (track) to spraying equipment continues to keep working without restriction, utilizes this adjusting can preset the adjusted value of the voltage of electric petrolift in spraying equipment.But, if set the limit value of the reduction of voltage, can limit injection equipment and/or the range of operation of internal-combustion engine, wherein, for example, can reduce the emitted dose of spraying equipment and/or the moment of torsion of internal-combustion engine.Can avoid thus the adjusting deviation of pressure, the adjusting deviation of the fuel pressure in the fuel storage device of spraying equipment namely.This can be used as fault reaction by trouble report, arranged by reduction functional unit default in the scope of this method and/or logical superpotential limitation function unit, or and this independently by specialized types, the monitoring of rail pressure is implemented.If low pressure range is for example intervened by adjustable throttling, the restriction that can show the voltage of the electric petrolift to spraying equipment in the time implementing this method.
If in the low pressure range of spraying equipment fuel pressure due to fuel meat clog and/or due to fuel filter stop up raises and and then the electric current demand rising of electric petrolift, in the time implementing this method, there is so such possibility, by adjusting, normally reducing voltage and change the operation point of electric petrolift, and electric current demand is readjusted in normal range of operation.At this, the quantity delivered of electricity petrolift reduces and makes the Pressure Drop (Druckabfall) in the low pressure range of spraying equipment reduce as its result, thereby can reduce the electric current demand of electric petrolift and electric current demand is turned back in the codomain of permission, this codomain is by maximum limit value and define by the minimum limit value of electric current if desired.
Other advantage of the present invention and design proposal are drawn by specification and accompanying drawing.
Self-evidently, feature aforesaid and that also will illustrate below not only can be in the corresponding combination providing, and can in other combination or individually, use, and does not depart from the scope of the present invention.
Brief description of the drawings
Fig. 1 illustrates the chart for the first mode of execution of proposed method;
Fig. 2 illustrates the chart for second mode of execution of this method;
Fig. 3 illustrates an example of the spraying equipment with electric petrolift and a mode of execution of the control gear that proposes in the diagram.
Embodiment
Schematically illustrated the present invention of mode of execution with reference to the accompanying drawings and present invention will be described in detail with reference to the accompanying below.
Briefly and uniformly describe accompanying drawing, identical reference character represents identical parts.
Fig. 1 comprises five charts generally, namely the first out-of-phase diagram table 2 and the second out-of-phase diagram table 4, wherein records the time taking millisecond as unit and records fuel pressure in the spraying equipment taking bar as unit along y coordinate 8 separately along abscissa 6 separately.In addition Fig. 1 illustrates the first electric current-time chart 10 and the second electric current-time chart 12, and it has abscissa 6 equally separately, records the time taking millisecond as unit along this abscissa.In addition, two electric current-time charts 10,12 comprise y coordinate 14 separately, and the electric current that flows through the electric petrolift of spraying equipment is unit recording along this y coordinate taking ampere.Middle part between the first out-of-phase diagram table 2 of on the left side and the second out-of-phase diagram table 4 on the first electric current-time chart 10 and the right and the second electric current-time chart 12, another chart 15 shown in Figure 1, this chart comprises abscissa 16, records the fuel pressure taking bar as unit along this abscissa.Record with the fuel delivery of the unit of being upgraded to per hour and along the second y coordinate 20 and record the electric current that flows through petrolift taking ampere as unit along the first y coordinate 18 of chart 15.
In first mode of execution proposing of this method, be designed to: the obstruction of fuel filter in due to spraying equipment, as shown in the first out-of-phase diagram table 2, force value is from the first 22s, operation point in the interior rising of the time period 24 of 50ms and reach the value of rising in the second operation point 26, and in the first operation point, pressure is 4.2bar.Draw thus, as illustrated in the first electric current-time chart 10, the electric current that flows through electric petrolift is elevated to the value of the obvious rising the second operation point 26 within the time period 24 of 50ms from the first operation point 22, for the first operation point, flow through the electric current of 7.5A at this, wherein be designed to, the current value in the second operation point 26 is greater than for this reason default limit value.The voltage being applied on electric petrolift has the first duty factor 27 of 95% in two operation points 22,26.
As for current value being brought up to the countermeasure on pre-set limit, reduce the threshold limit value of the permission that is applied to the voltage on electric petrolift.In addition, the first duty factor of 95% of voltage is lowered to the second duty factor of 85%.To this, reference chart 15, the second current curve 30 that depends on pressure while the figure shows out the first current curve 28 that depends on pressure in the time of the first duty factor 27 of 95% and the second duty factor 29 85%.In order to compare, chart 15 also illustrates the curve 32 of the steady current of 7.5A.Because the cause of the reduction of the threshold limit value of voltage has also reduced levels of current, this reduction also comes from the first duty factor 27 of 95% and is reduced to the second duty factor 29 of 85%.Thus for the pressure that has also reduced fuel the fuel delivery of being carried by electric petrolift.Chart 15 is illustrated in the first duty factor 27 of 95% during to this first curve 34 that depends on pressure of quantity delivered and in the time of the second duty factor 29 of 85% second curve 36 that depends on pressure of quantity delivered, wherein, the first curve 34 that depends on pressure when second curve 36 that depends on pressure of quantity delivered is lower than the first duty factor 27 95% in the time of the second duty factor 29 of lower 85%.
In the scope of this method, implement voltage-regulation time voltage duty factor 27,29 from 95% be reduced to 85% at this also to the pressure the 3rd operation point 38 and electric current generation effect, in the 3rd operation point, there is the second duty factor of 85%.Thereby by the reduction of duty factor 27,29 voltage, in the second operation point 26, occupied pressure is lowered to the less value in the 3rd operation point 38, as shown in the second pressure time chart 4.In addition, the electric current of the rising in the second operation point 26 is lowered to again the in comparison little value 7.5A in the 3rd operation point 38.
By show the structure of second mode of execution of proposed method according to the chart of Fig. 2.Can realized as software for the control gear of implementing the method by the shown method structure of chart.
The structure proposing that is used for second mode of execution implementing described method comprises the limitation function unit 56 by control gear control, and (eingehend) value 42 of the feed-in that is applied to the voltage on electric petrolift is restricted to the codomain between the minimum lower limit 46 of voltage and the CLV ceiling limit value 48 of maximum by this limitation function unit.Two limit values 46,48 of the codomain of voltage can be predetermined by the adjusting of depending on voltage (rail pressure adjusting) of fuel pressure in the fuel storage device (track) of spraying equipment in design.The pressure of the fuel in fuel storage device also depends on the amount of fuel, and this amount is also delivered to fuel storage device according to the electric current that flows through electric petrolift from electric petrolift by electric petrolift according to the voltage being applied on electric petrolift.
By input signal, the magnitude of voltage recording 42 feed-in, current is flowed to limitation function unit 56.In addition be provided for, the value 44 of (ausgehend) voltage, end synthesized by output signal by limitation function unit 56.At this, the value 42 of end value 44 feed-ins corresponding to voltage of voltage, as long as within the default limit value 46,48 of the codomain of the value 42 of the feed-in of voltage in voltage.44 of the voltage end values that provided by output signal by limitation function unit 56 are corresponding to minimum limit value 46, as long as the value 42 of the feed-in of voltage is less than minimum limit value 46.If the value 42 of the feed-in of voltage is greater than threshold limit value 48 on the contrary, voltage end value 44 is restricted to maximum limit value 48 by limitation function unit 56.
Reduce functional unit as long as no activating, be just in the primary importance shown in this for the first switch 59 of turn-on voltage so.The threshold limit value 48 as limitation function unit 56 by the default maximum value of voltage 47 in this case.The value recording 62 of the electric current of electricity petrolift is compared with the limit value 64 of electric current in the module 70 that is designed for comparison.If the value recording 62 of electric current exceedes limit value 64, second switch 52 switched for turn-on current and start timer module 72(Timer), wherein, utilize timer module 72 to measure, the value recording 62 of electric current has how long be greater than for this reason default limit value 64.In this monitoring, whether the value recording 62 of electric current is greater than limit value 64 longways than the time lag of definition.
In addition, will between the value recording 62 of electric current and default limit value 64,68 be transferred to integrator 54 for calculating differing from of differing from that 68 module 78 forms by the second switch 52 for turn-on current.As long as the value recording 62 is greater than the limit value 64 of electric current, draw minus tolerance 68.In the time there is minus tolerance 68, the value 49 of exporting from integrator 54 reduces a numerical value continuously for the threshold limit value 48 of assigned voltage, and this numerical value depends on and differ from 68 and therefore depend on the value recording 62 of electric current, and it is greater than default threshold limit value 64 at this.That numerical value that the threshold limit value 48 of voltage reduces also can depend on that voltage gradient in time reduces.Can utilize the time graph of the value that record of predetermined gradient to voltage and/or the time graph of the voltage threshold limit value that reduced is taken into account at this in procedure.
If the value recording 62 at the after-current that expired by the default time period of timer module 72 is greater than limit value 64, trigger 74(Trigger is set) and switch thus the 3rd switch 58 for connecting integrator 54 and the starting point (Ausgang) of trigger circuit module 76 being set.By diverter switch 58, utilize by limitation function unit 56 current provided, the end of voltage value 44 by integrator 54 initialization once.The starting point of trigger circuit module 76 is switched to the second place by the first switch 59 and the first switch 59 is remained in this position, wherein, the end value 49 being provided by integrator 54 is transferred to limitation function unit 56 continuously for upgrading the threshold limit value 48 of voltage.Because integrator 54 reduces continuously its end value 49 as described, therefore reduce continuously voltage codomain threshold limit value 48 and and then also reduce continuously the end value 44 of voltage.
If the value recording 62 of electric current is lower than limit value 64 now, readjustment is designed for the starting point of the module 70 of comparison, thus for turn-on current is adjusted back second switch 52 in its initial position.Thus the input end of integrator 54 is made as to zero, thereby keeps the current end value 49 of integrator 54 and no longer change it.The value 49 that therefore the threshold limit value 48 of limit value functional unit 56 is determined to is that provide by integrator 54, reduce and at this point maintaining.If the value recording 62 of electric current exceedes limit value 64 again, again switch the second switch 52 that is used for turn-on current and the input end that the negative value between the limit value of the value recording 62 and electric current 64 68 is transferred to integrator 54, wherein, continued to reduce the limit value 48 for setting voltage from the value 49 of integrator 54s.
For the end value 44 of voltage, in the described mode of execution of this method, draw: by activations reduce functional unit and by by integrator 54 by its end value 49 renewals and/or initialized voltage threshold limit value 48 be made as current end value 44.Reduce continuously subsequently threshold limit value 48 and therefore reduce concomitantly end value 44, as long as the value recording 62 of electric current is greater than for this reason default limit value 64.
Conventionally and this independently draw this possibility: voltage end value 44 meets magnitude of voltage 42 default and/or feed-in, wherein, the value 42 of feed-in is can be by the adjusting of the pressure of the fuel in the fuel storage device of spraying equipment (rail pressure adjusting) predetermined and/or depend on the operation point of spraying equipment, as long as within the value 42 of feed-in is in the codomain between minimum limit value 46 and threshold limit value 48.
Fig. 2 also illustrates counter 80, and the threshold limit value 48 of this counter calculating voltage depends on the value recording 62 of electric current, depend on differ from 68 and/or depend on the frequency that the time gradient of voltage reduces between the value 62 recording and default electric current threshold limit value 64.The parts of control gear can be implemented and/or be designed to by proposed control gear to module that at least some are described by Fig. 2, that be designed for enforcement the method.This also relates to switch 52,58,59, be designed for the module 70 that compares, timer module 72, for calculating the module 78, integrator 54, trigger 74, trigger circuit module 76 sum counters 80 that differ from 68.Control gear can also have at least one parts for realizing limit value functional unit 56 and reducing functional unit.
In Fig. 3, schematically show an example of the spraying equipment 100 of the internal-combustion engine of Motor Vehicle.This spraying equipment 100 comprises the electric petrolift 102 as parts, and this electricity fuel pump design is for being transported to fuel on the fuel storage device 104(rail altogether of spraying equipment 100).In Fig. 3, also schematically show the mode of execution of control gear 106, it is designed at least one parts of regulation and control spraying equipment 100, is at least the function of electric petrolift 102 and therefore for this function is controlled and/or regulated.At this, control gear 106 also regulates and controls the Operational Limits of electric petrolift 102, for example, is applied to the voltage on electrojet pump 102 and flows through the electric current of petrolift 102, normally it is monitored and is set.In addition, control gear 106 is designed at least one step of at least one mode of execution of implementing the method proposing according to Fig. 1 and 2.
That implement by control gear 106, for moving the method for electric petrolift 102 of spraying equipment 100, for the default maximum limit value of voltage being applied on electric petrolift 102, for the default threshold limit value of the electric current that flows through electric petrolift 102.This external pelivimetry is by the value of the required electric current of electric petrolift.For being applied to the value of the default threshold limit value of the situation default threshold limit value of voltage on electric petrolift 102 exceedes to(for) the value recording of the electric current electric current based on recording and/or reducing according to this value.
The default threshold limit value that is applied to the voltage on electric petrolift can depend in the scope of proposed method that the predetermined gradient of voltage reduces in time.At this, the variation in time of the gradient of voltage or voltage can relate to variation and/or the variation in time of voltage threshold limit value in time of the voltage that records, and it has reduced in time or had reduced in the time that this method is implemented.
The numerical value that voltage threshold limit value reduces can depend on poor between the value recording of electric current and the threshold limit value of electric current.In design proposal, likely, the numerical value that the threshold limit value of voltage will reduce determines by the functional unit for the numerical value of this voltage, and it depends on difference between the value recording and default maximum value and/or the predetermined gradient of voltage.
In addition likely, the default threshold limit value that is applied to the voltage on electric petrolift is for example utilized and reduces functional unit and reduce continuously or step by step, until electric current lower than or once again lower than default maximum limit value.
In order to reduce the limit value of voltage, also can reduce the duty factor that is applied to the voltage on electric petrolift 102.
In another kind of design proposal, reduce for being applied to when default threshold limit value that the default voltage threshold limit value of voltage on electric petrolift 102 can work as electric current is at least exceeded within default and/or definable time period.
Addedly, when electric current is during lower than limit value, the threshold limit value that is applied to the voltage on electric petrolift 102 can be lowered to minimum value, wherein, keeps the minimum value of voltage.
For move and and then be designed for for the control gear 106 of the operation that regulates and controls electric petrolift 102 and/or spraying equipment 100, utilize the ammeter for this reason arranging of control gear 106 to measure the required electric current of electric petrolift 102 and the default threshold limit value of situation exceed to(for) electric current based on and therefore depend on that the gradient of the current electric current recording and/or voltage is reduced to the default threshold limit value of voltage being applied on electric petrolift 102.
Control gear 106 can have integrator and/or realize integrator, and it is designed for, and depends on that poor between the value recording of electric current and the default threshold limit value of electric current reduces the threshold limit value of voltage like this, until electric current is lower than the threshold limit value allowing.
Claims (10)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013204235.3 | 2013-03-12 | ||
| DE102013204235 | 2013-03-12 | ||
| DE102013204725.8A DE102013204725B4 (en) | 2013-03-12 | 2013-03-18 | Method for operating an electric fuel pump |
| DE102013204725.8 | 2013-03-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104047731A true CN104047731A (en) | 2014-09-17 |
| CN104047731B CN104047731B (en) | 2018-07-24 |
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ID=51418858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410087232.5A Active CN104047731B (en) | 2013-03-12 | 2014-03-11 | Method for running electric petrolift |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104047731B (en) |
| DE (1) | DE102013204725B4 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626289A (en) * | 2014-11-24 | 2016-06-01 | 福特环球技术公司 | Method and system for fuel system control |
| CN116122978A (en) * | 2022-12-27 | 2023-05-16 | 联合汽车电子有限公司 | Method and device for detecting abnormal pump current of DMTL (direct current injection) pump and vehicle-mounted terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102017107907A1 (en) * | 2017-04-12 | 2018-10-18 | Volkswagen Aktiengesellschaft | Method for controlling a fuel delivery module and fuel delivery module |
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| CN1474045A (en) * | 2002-08-09 | 2004-02-11 | ������������ʽ���� | Internal Combustion engine fuel jet and ignitor |
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| CN105626289A (en) * | 2014-11-24 | 2016-06-01 | 福特环球技术公司 | Method and system for fuel system control |
| CN116122978A (en) * | 2022-12-27 | 2023-05-16 | 联合汽车电子有限公司 | Method and device for detecting abnormal pump current of DMTL (direct current injection) pump and vehicle-mounted terminal |
| CN116122978B (en) * | 2022-12-27 | 2025-04-29 | 联合汽车电子有限公司 | A method, device and vehicle-mounted terminal for detecting abnormal pump current of a DMTL pump |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102013204725A1 (en) | 2014-09-18 |
| CN104047731B (en) | 2018-07-24 |
| DE102013204725B4 (en) | 2025-03-13 |
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