EP3715631B1 - Verfahren zum betreiben einer dosierpumpe - Google Patents

Verfahren zum betreiben einer dosierpumpe Download PDF

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Publication number
EP3715631B1
EP3715631B1 EP20162562.1A EP20162562A EP3715631B1 EP 3715631 B1 EP3715631 B1 EP 3715631B1 EP 20162562 A EP20162562 A EP 20162562A EP 3715631 B1 EP3715631 B1 EP 3715631B1
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EP
European Patent Office
Prior art keywords
pump
sieve
occupancy
fluid
preheating
Prior art date
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.)
Active
Application number
EP20162562.1A
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German (de)
English (en)
French (fr)
Other versions
EP3715631A1 (de
Inventor
Jörg Keefer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eberspaecher Climate Control Systems GmbH and Co KG
Original Assignee
Eberspaecher Climate Control Systems GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE102019109384.8A external-priority patent/DE102019109384A1/de
Application filed by Eberspaecher Climate Control Systems GmbH and Co KG filed Critical Eberspaecher Climate Control Systems GmbH and Co KG
Publication of EP3715631A1 publication Critical patent/EP3715631A1/de
Application granted granted Critical
Publication of EP3715631B1 publication Critical patent/EP3715631B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/08—Cooling; Heating; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/20—Filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/04—Motor parameters of linear electric motors
    • F04B2203/0401—Current
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/04—Motor parameters of linear electric motors
    • F04B2203/0402—Voltage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/11—Outlet temperature

Definitions

  • the present invention relates to a method for operating a metering pump, which can be used, for example, to deliver liquid fuel to the burner area of a vehicle heater used, for example, as an auxiliary heater or auxiliary heater.
  • Such a metering pump for delivering liquid fuel to a burner area of a vehicle heater is from DE 10 2004 034 231 A1 known.
  • a fluid inlet area of this known metering pump comprises a screen through which the liquid fuel flowing to a pump chamber of the metering pump must flow. Contamination particles contained in the fuel are caught by the sieve and kept away from the area of a fuel pump, for example gasoline or diesel.
  • a method according to the preamble of claim 1 is from DE 37 29 938 C1 known.
  • an electromagnet coil arrangement that can also be operated as a pump element drive is excited in a heating mode in order to dissolve paraffin deposits in a sieve arranged in the fluid inlet area by the resulting heat.
  • the EP 0 116 419 A2 and the DE 10 2010 028 736 A1 each disclose a method for operating a fuel pump, in which an electromagnet coil arrangement to be operated as a pump member drive is operated at low temperature in order to preheat the fuel to be delivered by the fuel pump.
  • a method for operating a metering pump in particular a fuel metering pump in a vehicle heater, according to claim 1.
  • the metering pump comprises a pump chamber that can be filled with fluid to be delivered via a fluid inlet area, a pump member that can be moved from the pump chamber to deliver fluid via a fluid outlet area and a pump element drive associated with the pump element and having an electromagnetic coil arrangement, in which method in a pump preheating operation a pump preheating voltage is applied to the electromagnetic coil arrangement during a pump preheating phase.
  • the fluid inlet area has a screen through which the fluid flowing to the pump chamber can flow.
  • the pump preheating operation is carried out when a screen occupancy indicator indicates reduced flow through the screen.
  • a screen occupancy indicator is determined on the basis of a pump current flowing through the coil arrangement during pump operation of the metering pump when the pump voltage is applied to the metering pump.
  • a covering of the filter arranged upstream of the pump chamber, for example with paraffin, means that the movement behavior of the Pump element is changed when the pump voltage is applied during pumping operation in relation to an operating state in which the fluid to be pumped can flow unhindered in the direction of the pump chamber. Due to the interaction of the pump element with the magnetic field generated in the electromagnet coil arrangement, this changed movement behavior of the pump element influences the electric current flowing in the electromagnet coil arrangement when the pump voltage is applied. The electrical current flowing when the pump voltage is applied can thus be used as an indicator for excessive loading of the sieve, which triggers the changed movement behavior of the pump element.
  • the present invention makes use of the fact that the pump element is to be driven to move by an electromagnet coil arrangement and that the application of an electrical voltage to a coil of such an electromagnet coil arrangement leads to heating of the coil due to the electrical resistance.
  • a voltage is applied intermittently, so that during each work cycle, the interaction of the pump element generated when the voltage is applied and the magnetic field generated by the electromagnet coil arrangement creates a force that moves the pump element in one direction, while the movement in the opposite direction takes place in the Generally triggered by a bias spring.
  • the paraffin liquefied during pump preheating operation and initially still present in the area of the screen is conveyed with the fluid then conveyed through the pump chamber to the fluid outlet area.
  • a substantially constant pump preheating voltage be applied to the coil arrangement during the pump preheating phase.
  • a substantially constant pump preheating voltage can be provided, for example, as a DC voltage with a predetermined, possibly variable, voltage level.
  • a substantially constant pump preheating voltage can also be provided by applying a clocked pump preheating voltage, for example with a preheating duty cycle, during the pump preheating phase.
  • a DC voltage clocked for example, with the preheating duty cycle over a longer period of time, namely the pump preheating phase
  • an average voltage applied thereto is generated in the same way in the area of the electromagnet coil arrangement, which due to the fact that during the pump preheating phase over a longer period of time, leads to a significant heating of the dosing pump and thus also the sieve provided therein.
  • a sieve occupancy indicator can be determined on the basis of a development of the combustion temperature in a burner area fed with fuel by the metering pump before a flameout.
  • An increasing covering of a sieve with paraffin results in a decreasing supply of fuel to the fed burner area with constant operation of the metering pump.
  • a reduced supply of fuel leads to poorer combustion or less heat being released during combustion, so that the combustion temperature decreases as a sieve becomes increasingly covered with paraffin. If the occupancy is so high that there is no longer sufficient fuel supply for stable combustion possible, flame failure occurs. Such a flameout manifests itself in a spontaneous decrease in temperature in the region of a combustion chamber or in the exhaust gas flow path.
  • a sieve occupancy indicator can be determined on the basis of an operating time of the dosing pump. For this purpose, for example, the operating time of the dosing pump since the last execution of a pump preheating operation can be recorded. If a certain operating time limit is reached, this can be used as an indicator that, due to the amount of fluid conveyed over this operating time, there is a very high probability that a sieve has become or is expected to become clogged with paraffin and therefore before the next implementation of a Pump operation is first to carry out a pump preheating operation.
  • a stop time of the pump element is determined, and that the stop time is compared with a screen occupancy reference stop time, with a stop time lying before the screen occupancy reference stop time indicating a reduced flowability of the screen indicated. If the pumping element moves against too little resistance due to a lack of supply of fluid to be pumped, this leads to a movement that is too fast and therefore the pumping element hitting a movement stop assigned to it too early. The excessively rapid movement of the pump element can thus be evaluated as an indicator of insufficient resistance and thus of insufficient supply of the fluid to be pumped.
  • Covering the screen with paraffin is a continuous process which builds up over a period of minutes, for example, and will generally not lead to a spontaneous change in the amount of fluid flowing through the screen.
  • This expected continuous decrease in the amount of fluid passing through the sieve as the occupancy builds up can thus be evaluated to the effect that a combustion temperature falling essentially continuously over a sieve occupancy reference period before a flameout indicates a reduced flowability of the sieve.
  • an operating time of the metering pump can also be compared with a sieve occupancy reference operating time, and it can be assumed that the sieve occupancy reference operating time excessive operating time of the dosing pump indicates a reduced flow through the sieve. It is thus assumed and not verified by any evaluation measures that the target is coated with paraffin, so that in such a state a pump preheating operation can be carried out as a precaution.
  • a screen occupancy indicator can therefore be determined based on an ambient temperature.
  • the ambient temperature around the dosing pump can be compared with a screen occupancy reference ambient temperature, with an ambient temperature above the screen occupancy reference ambient temperature indicating sufficient flowability of the screen.
  • a pump preheating operation can be carried out before the next pumping operation of the metering pump in order to ensure a sufficient supply of fluid to the metering pump. If at least one screen occupancy indicator shows that the screen has sufficient flowability or that the screen can be assumed to have sufficient flowability, which can also mean that a reduced flowability of the screen that may be indicated by one or more other screen occupancy indicators is most likely not due to a Occupancy with paraffin is due, preferably before the next pumping operation of the metering pump, no pump preheating operation is carried out, since this is either not necessary or could not eliminate a condition leading to reduced permeability of the sieve.
  • this can be used in a particularly advantageous manner to dispense with performing a pump preheating operation when various circumstances indicate excessive loading of the sieve or indicate circumstances that make it appear necessary to carry out a pump preheating operation
  • the ambient temperature lying above the screen occupancy reference ambient temperature indicates that the screen is most likely not excessively covered with paraffin or is not the cause of a lack of flow through the screen, which may be indicated by other indicators, or the lack of inflow of fluid to be conveyed to the dosing pump is.
  • a screen occupancy warning can be generated, for example, which indicates a problem in the fluid supply to a user.
  • the procedure can be such that if at least one screen occupancy indicator indicates a reduced flowability of the screen, no pump preheating operation is carried out if the ambient temperature above the screen occupancy reference ambient temperature indicates sufficient flowability of the screen.
  • the pump preheating operation is performed such that the pumping operation is started substantially immediately after the pump preheating operation is completed. This means that there is no significant period of time between the end of the pump preheating operation and the start of the pumping operation during which liquefied paraffin can solidify again due to the cooling that then occurs again in the pump preheating operation.
  • the pump housing is surrounded by insulating material at least in the region of the electromagnet coil arrangement.
  • At least two insulating material bodies be provided which surround the pump housing in the manner of a ring.
  • a body of insulating material that at least partially surrounds the fluid inlet area can be held on the pump housing by a fluid supply line that is to be connected to the fluid inlet area.
  • the fluid inlet area can have a fluid flow channel leading to the screen. If it is provided that the fluid flow channel opens into a flow calming chamber arranged upstream of the screen with a flow cross section that is larger in relation to a flow cross section in the fluid flow channel, the cutting of in the fluid flow channel to be conveyed Fluid entrained paraffin is already supported in this area of the flow calming chamber due to the flow calming occurring upstream of the screen, so that the risk of the screen being covered with paraffin is reduced. Since the area of the flow calming chamber is also heated in the pump preheating mode, paraffin that is deposited there is also liquefied again and conveyed through the pump in the subsequent pumping mode.
  • the pump member can include a pump piston that can be moved back and forth in the pump chamber in the direction of a pump longitudinal axis.
  • the present invention is hereinafter described with reference to the attached 1 described in detail, which shows a dosing pump in principle-like longitudinal section representation.
  • a dosing pump is generally denoted by 10 .
  • the metering pump 10 can be used, for example, to deliver liquid fuel as the fluid to be delivered from a fuel tank in the direction of a fuel-operated vehicle heater.
  • the metering pump 10 includes a fluid inlet area 12 with an inlet attachment 16 provided on a pump housing 14 .
  • a screen receiving chamber 24 is formed, in which a screen 26, for example a substantially cup-shaped screen, is accommodated.
  • a fluid flow channel 28 is formed in the inlet connector part 18, in which the liquid fuel supplied via the fuel line 20 can enter.
  • a settling chamber 30 is formed in the inlet connector part 18 adjoining the fluid flow channel 28, which has a significantly enlarged flow cross section with respect to a flow cross section in the fluid flow channel 28, so that upstream of the screen 26 there is a reduction in the flow speed of the liquid flowing through the fluid flow channel 28 fluid flowing through, for example fuel, and thus a calming of the flow is generated.
  • a pump chamber 32 which is only shown in a basic manner.
  • a pump element 34 is accommodated in the pump chamber 32 in such a way that it can be moved back and forth in the direction of a longitudinal axis A of the pump.
  • the pumped fluid expelled from the pump chamber 32 by the movement of the pump member 34 is pumped via a fluid outlet area 36 to the system area to be supplied with the fluid, ie for example the burner area of a vehicle heater.
  • a check valve can be provided in the flow area upstream of the pump chamber 32 and in the flow area downstream of the pump chamber 32, which allows a flow in the direction of the pump chamber 32 in the flow area upstream of the pump chamber 32 and in the flow area downstream the Pump chamber 32 lying flow area allows a flow only out of the pump chamber 32 out.
  • the pumping element 34 comprises a pumping piston 38 and an armature 40 connected to it or provided by it.
  • a pumping element drive 42 which has an electromagnetic coil arrangement 44 with at least one by applying an electrical voltage for generating a magnetic field excitable coil is provided.
  • the interaction with the armature 40 generated when a magnetic field is generated generates a force that moves the pump piston 38 to eject fluid from the pump chamber 32 .
  • a pump voltage is intermittently applied to the electromagnet coil arrangement 44 in order to carry out a clocked pump operation.
  • This can be over a control arrangement 46 which has a control interaction with the metering pump 10 .
  • the control arrangement 46 can include a microprocessor or the like, for example, and in coordination with the operation of a vehicle heater, for example, activate the metering pump 10 to carry out the pumping operation or apply a corresponding pump voltage to the electromagnet coil arrangement.
  • the pump voltage applied by the control arrangement 46 to the electromagnet coil arrangement 44 can be a clocked voltage, i.e.
  • a voltage provided with a predetermined pulse duty factor, with a clock frequency in the kHz range so that during a pumping period for moving the pump piston 38 for ejecting fluid from the pump chamber 32 serving discharge stroke the pump voltage is applied with the predetermined duty cycle, while for a suction or intake stroke, ie during the return movement of the pump piston 38, no voltage is applied to the electromagnet coil assembly.
  • the structural measures provided with regard to the structural design of the metering pump 10 for conducting the fluid to be pumped into the pump chamber 32 and for ejecting fluid from the pump chamber 32, the metering pump 10 in 1 is only shown in principle.
  • a wide variety of flow guides known from the prior art can be provided, which allow the fluid to be pumped to flow over the sieve 26 in the direction of the pump chamber 32 .
  • the screen 26 serves to prevent particles carried along in the pumped fluid from reaching the area of the pump chamber 32 and the pump piston 38 .
  • this fuel such as. B. petrol or diesel
  • this fuel such as. B. petrol or diesel
  • the electromagnet coil arrangement 44 is continuously excited in a pump preheating operation during a pump preheating phase. This can be done by applying a DC voltage to the electromagnet coil arrangement, or by applying a voltage provided with a pulse duty factor, for example clocked in the kHz range, which when applied over a longer period of time also builds up an average voltage on the electromagnet Coil assembly voltage applied leads. By applying such a voltage to the electromagnet coil arrangement, the electromagnet coil arrangement and thus also the pump housing 14 carrying it are gradually heated due to the electrical resistance.
  • the heat absorbed in the pump housing 14 is also transferred to the screen 26 and any paraffin that may have precipitated thereon.
  • such paraffin is thus melted in the area of the screen 26 and possibly also in the area of the flow calming chamber 30 . If, after the end of the pump preheating operation, the pump operation is then started without any substantial delay, for example immediately afterwards, such paraffin is still liquefied and is conveyed with the fluid then conveyed, e.g. fuel, through the sieve 26 and also the pump chamber 32 and out of the Metering pump 10 ejected.
  • the pump housing 14 is surrounded on the outside by insulating material 48 .
  • two insulating material bodies 50, 52 are provided which surround the pump housing 14 and also the inlet extension 16 and the inlet connector part 18 in a ring-like manner. These can be constructed, for example, with rubber-like or foam-like material, which prevent or reduce the release of heat to the outside.
  • the two insulating material bodies 50, 52 can be provided axially abutting one another. An axial falling of the insulating material body 50, in the representation of 1 to the left can be prevented in that the pump housing 40 is designed to widen radially outwards in its axial end facing the fluid outlet area 36 . A movement of the insulating material body 52 in the Another axial direction can be prevented by the fuel line 20 blocking the insulating material body 52 against movement axially after the fuel line 20 has been pushed onto the inlet connection piece 22 .
  • the excitation of the electromagnet coil arrangement 44 in the preheating operating phase takes place over such a long period of time with an approximately constant voltage, which is significantly longer than an excitation interval to be provided for moving the pump piston to expel fluid from the pump chamber 32 during the pump operation.
  • the pump piston 38 moves with a movement frequency in the range of a few Hz, which means that a few excitation time intervals occur per second, during which the electromagnet coil arrangement 44 for moving the pump piston 38 is excited by applying a voltage clocked in the KHz range, for example .
  • the electrical current flowing during such a pump operation is monitored by the control arrangement 46 and used as an indicator of whether or to what extent the screen 26 is occupied.
  • An increasing loading of the screen 26 results in less fluid flowing in the direction of the pump chamber 32 with each intake stroke of the pump piston 38 than in a state in which the screen 26 is not covered with impurities or paraffin.
  • the pump piston 38 will move faster and thus come to rest earlier on a movement stop 54 provided for the pump piston 38 with each work cycle.
  • the spontaneous ending of the movement of the pump piston 38 that occurs in this case leads to a significant change in the current flowing in the electromagnet coil arrangement 44 due to the interaction of the armature 40 with the magnetic field of the electromagnet coil arrangement 44 .
  • a detection of the stop time of a pump piston is, for example, from DE 10 2005 024 858 A1 known.
  • a screen occupancy reference stop time can be specified for the movement of the pump piston 38 . If it is recognized that the pump piston 38 has reached the movement stop 54 before the sieve occupancy reference stop time, i.e. too early, this can be used as an indicator of a too fast movement of the pump piston 38 and thus a movement of the pump piston 38 against too little resistance.
  • the combustion temperature can be monitored in a burner area fed with fuel by the metering pump 10, for example of a vehicle heater.
  • flame monitors designed as temperature sensors can be used in the area of a combustion chamber or in the exhaust gas flow.
  • An increasing covering of the screen 26 with paraffin results in a reduction in the amount of fuel conveyed per unit of time if the pumping operation continues unchanged. This in turn causes a worse one Combustion or a lower amount of heat released per unit of time in the burner area and therefore a decreasing combustion temperature. Excessive occupancy and correspondingly low fuel passage can lead to flame failure.
  • a sieve coverage reference period preceding the flameout is then evaluated with regard to the development of the combustion temperature and it is determined that the combustion temperature has continuously decreased over a period of, for example, a few minutes, this can be used as an indicator of an increasing or, in the end, excessive coverage of the Sieve 26 with paraffin can be used.
  • the pump preheating operation can first be carried out in order to first melt the paraffin that has precipitated in the sieve 26 and then eject it from the dosing pump 10 in the subsequent pumping operation.
  • the operating time of the metering pump 10 for example, since the last time a pump preheating operation was carried out, can be used as an indicator for the covering of the sieve 26 with paraffin, since it is to be expected that the sieve has flowed through for a predetermined period of time, which exceeds a sieve occupancy reference operating period 26 with fuel has led to a covering with paraffin which has to be eliminated.
  • the pump preheating operation can then be carried out before the next pump operation is carried out.
  • the temperature in the vicinity of the metering pump 10 can be recorded and compared to a sieve occupancy reference ambient temperature. If, for a reference period of, for example, one or more hours before the metering pump was started up, the ambient temperature was above the sieve occupancy reference ambient temperature in the range of, for example, around 0°C, this can be taken as an indicator that the paraffin contained in a fuel is still liquefied and has not been deposited on the sieve 26 or that any paraffin previously deposited there has melted again.
  • a Reduced flowability of the sieve 26 with paraffin is not to be expected, so that even if other indicators point to a reduced flowability of the sieve 26, it is not necessary to carry out a pump preheating operation to melt paraffin or the circumstance which the throughflow of the sieve impaired, could not eliminate, since solids that may have been entrained in the fuel have led to the sieve 26 becoming occupied.
  • a warning signal can then be generated, for example, to inform a user that there is a problem with the supply of fuel to the metering pump.
  • all the sieve occupancy indicators described above can be used to trigger a pump preheating operation. Whenever any of these screen loading indicators indicate that excessive loading of the screen 26 has occurred or is expected to occur, a pump warm-up operation may be performed prior to a pumping operation. However, if one of the indicators shows that the reduced permeability of the sieve 26 is most likely not due to a coating of paraffin, a preheating operation of the metering pump 10 can be dispensed with, despite the fact that other indicators show a coating.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Reciprocating Pumps (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
EP20162562.1A 2019-03-27 2020-03-12 Verfahren zum betreiben einer dosierpumpe Active EP3715631B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019107900 2019-03-27
DE102019109384.8A DE102019109384A1 (de) 2019-03-27 2019-04-10 Verfahren zum Betreiben einer Dosierpumpe

Publications (2)

Publication Number Publication Date
EP3715631A1 EP3715631A1 (de) 2020-09-30
EP3715631B1 true EP3715631B1 (de) 2023-05-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20162562.1A Active EP3715631B1 (de) 2019-03-27 2020-03-12 Verfahren zum betreiben einer dosierpumpe

Country Status (3)

Country Link
EP (1) EP3715631B1 (pl)
FI (1) FI3715631T3 (pl)
PL (1) PL3715631T3 (pl)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8302158D0 (en) * 1983-01-26 1983-03-02 Wasley R Apparatus for heating diesel engine fuel
DE3729938C1 (de) * 1987-09-07 1989-03-30 Eberspaecher J Einrichtung zum Foerdern und Vorwaermen kaelteempfindlicher Brennstoffe
DE102004034231B4 (de) 2004-07-15 2006-07-13 J. Eberspächer GmbH & Co. KG Dosierpumpe
DE102005024858A1 (de) 2005-05-31 2006-12-07 J. Eberspächer GmbH & Co. KG Verfahren zum Betreiben einer Dosierpumpe, insbesondere zum Fördern von Brennstoff für ein Fahrzeugheizgerät
DE102010028736B4 (de) * 2010-05-07 2020-12-03 Eberspächer Climate Control Systems GmbH Brennstoffversorgungssystem, insbesondere für ein Fahrzeugheizgerät und Verfahren zum Betreiben eines Brennstoffversorgungssystems

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Publication number Publication date
FI3715631T3 (fi) 2023-06-20
EP3715631A1 (de) 2020-09-30
PL3715631T3 (pl) 2023-09-11

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