WO2016119919A1 - Verfahren zum betreiben und ansteuereinrichtung für eine kolbenpumpe - Google Patents
Verfahren zum betreiben und ansteuereinrichtung für eine kolbenpumpe Download PDFInfo
- Publication number
- WO2016119919A1 WO2016119919A1 PCT/EP2015/070262 EP2015070262W WO2016119919A1 WO 2016119919 A1 WO2016119919 A1 WO 2016119919A1 EP 2015070262 W EP2015070262 W EP 2015070262W WO 2016119919 A1 WO2016119919 A1 WO 2016119919A1
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- WIPO (PCT)
- Prior art keywords
- coil
- voltage
- piston
- course
- semiconductor switch
- Prior art date
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Classifications
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- 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
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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
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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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2464—Characteristics of actuators
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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
- 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
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- 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
- F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
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- 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
- F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
- F04B17/044—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow using solenoids directly actuating the piston
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- 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
- F04B17/048—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing around the moving part of the motor
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- 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
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/20—Other positive-displacement pumps
- F04B19/22—Other positive-displacement pumps of reciprocating-piston type
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- 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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
- F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids
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- 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
- F04B49/065—Control using electricity and making use of computers
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- 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
- F04B49/12—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 by varying the length of stroke of the working members
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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
- F02D2041/2037—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit for preventing bouncing of the valve needle
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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
- F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
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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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2201/00—Pump parameters
- F04B2201/02—Piston parameters
- F04B2201/0201—Position of the piston
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- 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
- F04B2201/00—Pump parameters
- F04B2201/02—Piston parameters
- F04B2201/0206—Length of piston stroke
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- 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
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- 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
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- 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
- F04B2203/0403—Magnetic flux
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- 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
- F04B2203/0404—Frequency of the electric current
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- 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
- F04B53/14—Pistons, piston-rods or piston-rod connections
Definitions
- This invention relates to a method of operating a piston pump which is driven by means of a coil of an electromagnet, wherein by means of the
- Electromagnet a piston of the piston pump is movable in a cylinder for pumping, wherein during a duty cycle, a voltage is applied to the coil, so that a current flows through the coil and the piston is accelerated, wherein the voltage is applied by means of a drive means.
- the invention relates to a drive device for a piston pump for conveying a liquid, in particular a fuel, with a cylinder, a piston and an electromagnet with a coil for moving the piston in the cylinder.
- the invention relates to a piston pump.
- piston pumps which are drivable by means of the coil of an electromagnet. These can be used for example as a fuel pump.
- a fuel pump By way of example, such a pump is in an embodiment as
- the piston pump comprises a spool 1, a piston 2 with a piston head 4, a cylinder 3, a coil spring 5 with an abutment 6 and a valve unit 7.
- a current flows through the coil 1
- a magnetic flux is caused through its interior.
- the piston 2 is magnetically moved away from the valve unit 7, whereby the coil spring 5 is biased against its abutment 6.
- the volume between the valve unit 7 and the piston head 4 increases, whereby a suction takes place.
- the current in the spool 1 is cut off, so that the spool remains on the stopper 8 to allow a suctioning operation to be completed.
- the piston 2 is then by the bias of the coil spring 5 in the direction of
- Valve unit 7 moves, whereby a Ausschiebevorgang takes place, in which the pumping fluid is pushed into the valve unit 7. It is also a pump conceivable in which the pushing out by means of magnetic effect and the suction by means of spring action are performed.
- a drive unit is known, as shown in FIG.
- a coil which has an inductive component L_coil_pump and a resistive component L_coil_pump, is connected to a supply voltage + UB.
- a semiconductor switch HS is connected, which is designed as an n-channel MOSFET.
- the semiconductor switch HS is via a
- Shunt resistor R shunt connected to a ground potential GND and can be controlled via a series resistor Rv LS.
- the coil By opening and closing the semiconductor switch HS, the coil can be acted upon by a voltage U_coil_pump. As a result, a current flows through the coil. The same current also flows through the shunt resistor R_shunt, at which its size is measured by measuring
- a method for operating the piston pump is proposed in which a time profile of an electrical state variable of the coil is qualitatively recorded.
- a state variable may be a current in or a voltage on the coil. It is also conceivable to detect and / or calculate a quotient or other quantities derived from current and voltage.
- a qualitative detection here means that it is not based on absolute values, for example a measured value
- the drive device for the piston pump may be part of a control device of a vehicle.
- the method can be executed by the drive device and / or the control unit.
- the attack time is recognized by the fact that in a first time derivative of the detected course of the electric
- State variable of the coil is an extreme value is determined and whose time is determined as a stop time.
- Speed of the piston causes a counter tension in the coil, which changes by the impact. This leads to a disturbance in the uniformity of the detected course, which shows up as a kink. Such deviations of the uniformity can be better recognized by temporal derivation of the course and therefore better automatically evaluated.
- Stop time can be defined.
- the current flow is the
- the reference profile can be stored in a control unit, in particular in a control unit of a motor vehicle, which can comprise or communicate with the control unit for the piston pump. It is also conceivable that an intelligent control device is used, in which the reference curve is stored. To determine the reference curve, the slope of the curve can be determined shortly after the start of the coil energization. From this value can be concluded that the inductance of the coil. In addition, a test pulse drive may be performed with a voltage pulse for the coil having a duration sufficient to drive the coil to saturation. From this process, a saturation value of the coil can be determined, such as a maximum current flowing through the coil. From this saturation value can be derived parameters of the coil, such as their internal resistance.
- the inductance of the coil can be calculated.
- Another way to determine parameters of the coil is to measure the coil voltage when switching off the coil. In this case, the actual course of the measured voltage can be subtracted from a turn-off reference voltage curve and an extreme value can be searched for. Thereby, the time can be determined at which the piston detaches from the stop.
- Timing detected for a particular operating condition Accordingly, a detected attack time may be stored along with parameters indicating an operating condition.
- the energization of the coil is terminated when a stop time is detected. In this way it is prevented that continues to be applied to the coil, a supply voltage, although the piston has reached the stop. Due to the not abruptly breaking magnetic effect of the piston remains typically for a period of time after the shutdown of the
- a time is reached after the start of the energization, which corresponds to a stored stop time.
- an attack time is stored for a specific operating state. The shortened duration of concern of the supply voltage energy is saved.
- the energization is terminated before an expected, in particular stored attack time is reached.
- energy can be utilized for the pumping process, which are stored after the end of the energization in the swing of the piston as kinetic energy and in the electromagnet as magnetic energy, with which the piston reaches the stop without further energy input. It is thus saved energy loss in the coil and in an output stage of the drive.
- Stop time during which the energization is switched off prematurely, a quarter or less.
- the piston reaches the stop at a significantly lower speed. Therefore, a noise reduction and at the same time a reduction in wear is achieved.
- a control is performed with which the energization time is set to the minimum required duration, which is necessary for tightening the piston. It can also be found, for example, if only a very small
- the speed at impact can be determined, for example, as the extent of the change in the current in the coil upon impact or on the basis of the voltage resulting from the coil after switching off the current supply.
- an electrical power loss on the coil is minimized at least approximately.
- Electromagnet is driven, wherein by means of the electromagnet, a piston of the piston pump is movable in a cylinder for pumping, wherein a voltage is applied to the coil during a duty cycle, so that a current flows through the coil and the piston is accelerated, wherein the voltage means a drive device is applied.
- the Applicant reserves the right to apply a separate application to the invention. The ones described below
- Embodiments may be combined with the other described embodiments of the method.
- a steam delivery is detected on the basis of the time course of the electrical voltage after switching off the current to the coil. If, after aspiration, in addition to a liquid medium, for example a fuel, there is also vapor of the liquid medium in the pumping volume, the piston is accelerated very rapidly by a pushing-out force until the vapor is compressed. Due to the high piston speed, this leads to an increased counter tension, which generates the movement of the piston in the coil. In this way results in the voltage curve, which rests against the coil, a noticeable burglary. In particular, at this voltage dip, the presence of steam in the liquid medium can be detected.
- a liquid medium for example a fuel
- the voltage dip can be detected by, after the decay of the current through the coil, which takes place after switching off the energization, during a period before the re-energizing the
- Steam delivery can be detected by the fact that the derivative exceeds a threshold.
- a drive device which is set up to carry out a method according to one of the embodiments described above.
- the drive device can be arranged on the piston pump; However, they can also be separated from the piston pump and arranged be connected to this by electrical lines or connectable.
- the control device forms part of another control device, in particular a part of an engine control device of a motor vehicle.
- a driving device for a piston pump for conveying a liquid, in particular a fuel, with a cylinder, a piston and an electromagnet having a coil for moving the piston in the cylinder is proposed is to qualitatively detect a time course of an electrical state variable of the coil and to evaluate the course or a derivative therefrom, to detect a striking of the piston to a stop.
- Stop time of the piston to which the piston abuts a piston seat based on the course of the electrical state variable detectable and in particular storable.
- a period of concern of the supply voltage to the coil is set such that the piston reaches the stop by its momentum after the end of the period and reaches the stop particularly with compared to its maximum speed significantly low speed. It is conceivable, after a reduction in the
- Embodiment of the driving device this is adapted to recognize based on the time course of the electrical voltage across the coil, a steam delivery.
- the embodiments of the driving device described below are to be regarded as an independent invention, which is independent of the other inventions described in this application.
- the invention described below further forms a driving device for a piston pump for conveying a liquid, in particular a fuel, with a cylinder, a piston and an electromagnet with a coil for moving the piston in the cylinder independently.
- the applicant reserves the right to an independent driving device for a piston pump for conveying a liquid, in particular a fuel, with a cylinder, a piston and an electromagnet with a coil for moving the piston in the cylinder independently.
- this has a semiconductor switch, such as a MOSFET transistor, a bipolar transistor or another power semiconductor switch.
- a voltage can be applied to the coil.
- the semiconductor switch is preferably connected in series with the coil, wherein in particular a terminal of the coil is conductively connected to a terminal of the semiconductor switch.
- the semiconductor switch and the coil are for this purpose preferably between a supply voltage potential and a ground potential, to which the coil and the semiconductor switch are each connected to a terminal. Preferred are in the current path of the
- Embodiment is to use the through-connected semiconductor switch as a shunt resistor for measuring the current through the semiconductor switch.
- a conventional shunt resistor the state of the art used for current measurement can be saved. This also saves the power loss at the shunt resistor. Slight deviations in the constancy of the resistance of the switched through semiconductor switch are for the detection of
- a voltage drop across the semiconductor switch is preferably measured, in particular with an AD converter.
- the coil current can be calculated at least approximately with a resistance value for the closed semiconductor switch.
- the voltage drop across the closed semiconductor switch is measured at a terminal of the semiconductor switch with respect to a ground potential or at a terminal of the semiconductor switch with respect to a supply voltage potential.
- the voltage across the coil is calculated by taking the difference between the power supply potential and the
- Ground potential is subtracted from the voltage measured across the semiconductor switch, wherein the voltage is measured when the semiconductor switch is open. Since in many cases the difference between the power supply potential and the ground potential as operating voltage from other measurements is known or fixed, means the measurement of a voltage across the open
- Semiconductor switch can be performed an A / D converter, with which also the voltage across the open semiconductor switch can be measured.
- U.U. In this case, a measuring range adaptation is required, which can be realized, for example, with a voltage divider.
- the coil is connected in parallel to a current path which comprises an additional semiconductor switch and a diode. The diode is in relation to a current direction from the power supply potential to the
- the additional semiconductor switch allows, after switching off the semiconductor switch for the application of the
- the semiconductor switch for applying the power supply potential is connected in parallel with a zener diode, which is connected in reverse direction with respect to the current direction from the voltage supply potential to the ground potential.
- This zener diode allows fast quenching of the energy of the coil in the zener diode.
- the semiconductor switch is turned off When this is done, current from the coil, which it continues to drive due to its magnetic energy, is conducted back to the coil via this zener diode and a power supply providing the power supply potential.
- the Zener diode finds a strong due to their breakdown voltage
- a piston pump which comprises a drive device according to one of the above-described
- FIG. 1 shows a cross section through a prior art piston pump, a circuit diagram of a drive device according to the prior art, a circuit diagram of a first embodiment of a drive device according to the invention, a circuit diagram of a second embodiment of a drive device according to the invention, a circuit diagram of a third embodiment a drive device according to the invention, a double diagram in which a voltage across the coil and a current through the coil are shown in a two common period, wherein a conventional course of current and voltage is shown a double diagram in which a voltage across the coil and a current through the coil are shown in a two common time period, wherein a course of current and voltage is shown using a first embodiment of the invention
- Figure 8 is a double diagram showing a voltage across the coil and a current through the coil in a common time period, with a graph of current and voltage shown using a second embodiment of the invention, and
- Figure 9 is a double diagram showing a voltage across the coil and a current through the coil in a two common time period, showing a conventional waveform of current and voltage, but conveying liquid fluid and vapor.
- FIG. 3 shows a circuit diagram of a drive device as part of the invention. This part of the invention has independent significance. The Applicant reserves the right to make a separate application to this subject.
- the drive device shown can be part of a more comprehensive unit.
- a coil of an electromagnet of a piston pump and a semiconductor switch LS are connected in series between a supply voltage potential + UB and a ground potential GND.
- the semiconductor switch LS is designed as an n-channel MOSFET transistor. Alternatively, the semiconductor switch LS can also be designed as a p-channel MOSFET transistor.
- a source terminal S of the transistor is connected to the
- a drain D is connected to one terminal of the coil.
- the gate terminal G is connected via a series resistor Rv LS to a drive potential.
- a voltage drop U_DS can be tapped between the drain D and the source S. The voltage drop can for
- the coil comprises an inductive component L coil and a resistive component R_coil, which are connected in series.
- One connection of the coil is with the
- Semiconductor switch HS is connected.
- FIG. 4 shows a circuit diagram of a second embodiment of the drive device.
- the second embodiment is similar in many respects to the first embodiment shown in FIG. Identical features are designated by the same reference numerals and reference is made in this regard to FIG. In the following, only differences to FIG. 3 will be discussed.
- the second embodiment additionally has a zener diode which is connected to the drain and source of the semiconductor switch LS connected and in relation to the supply voltage potential + UB in
- the drive device has an additional current path with a series circuit of a further semiconductor switch HS and a diode D1 connected in the reverse direction with respect to the supply voltage potential + UB.
- the drain of the semiconductor switch HS is connected to the
- the anode of the diode D1 is connected to the drain of the semiconductor switch LS.
- Source of the semiconductor switch HS and the cathode of the diode D1 are connected together.
- the semiconductor switch HS can be controlled via its gate and a series resistor Rv HS.
- the circuit has a shunt resistor, at which a voltage U_shunt for measuring a current through the coil L coil can be removed.
- the semiconductor switch LS For energizing the coil L coil, the semiconductor switch LS is first switched conductive. When a duty cycle has elapsed, the semiconductor switch LS is opened. Then, the coil L coil generates a voltage U_coil_pump. This drives a current through a freewheeling circuit.
- the semiconductor switch HS is used to activate a freewheeling circuit with a weak effect, which passes through the diode D1 and the semiconductor switch HS closed thereto. Since the voltage drop across the closed semiconductor switch HS and the diode D1 is low, the coil L coil is deprived of energy only slowly, so that the coil current is slowly extinguished. If the semiconductor switch is opened instead, there is a strong extinguishing effect.
- the current path of the current driven by the coil then passes through the zener diode ZD, the shunt resistor R shunt and a power supply device which provides the supply voltage potential + UB.
- the high energy loss leads to a rapid quenching of the current through coil L coil.
- FIG. 5 shows a modified embodiment of that shown in FIG.
- FIGS. 4 or 5 A drive device in an embodiment of FIGS. 4 or 5 is used.
- the voltage U In a first period I, the voltage U is approximately constant at zero and the current I is also substantially zero.
- the piston stops at a rest stop or makes a slow push-out movement to pump fluid.
- the coil Period I to the period II, the coil is applied to the supply voltage, so that the voltage U rises sharply very quickly. Due to the inductance and the internal resistance of the coil, an inertia results in the following of the current through the coil I, which rises slowly and reaches its maximum value at the end of the period II. The rise begins approximately with constant slope, which is disturbed at a kink K by a small unevenness. This is related to the fact that at the beginning of the kink to the
- Stop time tA the piston of the piston pump abuts a stop, whereby its speed is greatly reduced and the piston generated by this no counter tension. Therefore, the time of the kink corresponds to a stop time.
- a greater effective voltage is applied to the coil, so that the current I increases with a greater gradient from this point of impact.
- the slope decreases until the end of the period II more and more.
- the coil is disconnected from the supply voltage.
- the semiconductor switch LS is turned off.
- the neck conductor HS is turned on, so that only a slight quenching of the coil current takes place.
- the voltage U thereby drops very quickly to just below zero, where it remains during the period III. in the
- Period III takes the current I through the setting of the
- FIG. 7 shows a modification of the double diagram of FIG
- period II is thereby shortened while the period III is extended.
- the period II is terminated slightly after the time of the kink K by the coil is disconnected from its supply voltage.
- the acceleration of the piston is terminated early, so that it continues to run due to its jump and due to the slowly decreasing magnetic action and the still flowing through the coil current I and arrives at its stop at a comparatively slower speed. This leads to less noise and less wear.
- the voltage U drops slightly below zero.
- the current I falls slowly to smaller values.
- the rest of the cycle of the voltage U of the current I corresponds to that shown in FIG.
- FIG. 3 Overall, there is a significantly lower energy consumption compared to that of FIG. 3, which can be seen from the shortened duration of application of the supply voltage and from the lower maximum current intensity and the smaller amount of charge flowed, as can be seen from the area under the curve of the current I. results.
- FIG. 8 shows a modification of the double diagram of FIG
- the semiconductor switch LS is opened.
- the semiconductor switch HS remains closed or is opened, depending on whether a strong or weak current cancellation is desired.
- the period IIa corresponds to a time-braking portion in which the speed of the piston and / or its acceleration is reduced by the fact that the
- the current I decreases somewhat, whereas in the period II, which surrounds the period IIa, it rises rapidly.
- the period IIa begins at the
- Period IIa can be used as a control variable for a control of an optimized
- FIG. 9 shows a modification of the double diagram of FIG.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Computer Hardware Design (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Electromagnetic Pumps, Or The Like (AREA)
- Fuel-Injection Apparatus (AREA)
- Electronic Switches (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US15/546,302 US10989186B2 (en) | 2015-01-28 | 2015-09-04 | Operating method and actuation device for a piston pump |
CN201580074890.3A CN107208566B (zh) | 2015-01-28 | 2015-09-04 | 用于运行的方法以及用于活塞泵的操控装置 |
JP2017540220A JP6524246B2 (ja) | 2015-01-28 | 2015-09-04 | ピストンポンプの動作方法及び駆動制御装置 |
Applications Claiming Priority (2)
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DE102015201466.5A DE102015201466A1 (de) | 2015-01-28 | 2015-01-28 | Verfahren zum Betreiben und Ansteuereinrichtung für eine Kolbenpumpe |
DE102015201466.5 | 2015-01-28 |
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WO2016119919A1 true WO2016119919A1 (de) | 2016-08-04 |
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PCT/EP2015/070262 WO2016119919A1 (de) | 2015-01-28 | 2015-09-04 | Verfahren zum betreiben und ansteuereinrichtung für eine kolbenpumpe |
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Country | Link |
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US (1) | US10989186B2 (de) |
JP (1) | JP6524246B2 (de) |
CN (1) | CN107208566B (de) |
DE (1) | DE102015201466A1 (de) |
TW (1) | TWI713490B (de) |
WO (1) | WO2016119919A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102015201463A1 (de) * | 2015-01-28 | 2016-07-28 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Kolbenpumpe, einer Steuereinrichtung und Kolbenpumpe |
IT201700035919A1 (it) * | 2017-03-31 | 2018-10-01 | Bosch Gmbh Robert | Gruppo pompa per alimentare combustibile ad un motore a combustione interna e metodo di funzionamento di tale gruppo |
DE102017008988A1 (de) | 2017-09-26 | 2019-03-28 | Albonair Gmbh | Verfahren zur Überwachung einer Magnetkolbenpumpe |
JP6973010B2 (ja) * | 2017-12-13 | 2021-11-24 | トヨタ自動車株式会社 | 燃料ポンプの制御装置 |
JP6922713B2 (ja) * | 2017-12-13 | 2021-08-18 | トヨタ自動車株式会社 | 燃料ポンプの制御装置 |
FR3075273B1 (fr) * | 2017-12-19 | 2021-12-10 | Continental Automotive France | Procede de gestion d'une pompe a piston pour moteur thermique |
DE102018222731A1 (de) * | 2018-12-21 | 2020-06-25 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Pumpe und System mit einer solchen Pumpe |
FR3092146B1 (fr) * | 2019-01-24 | 2020-12-25 | Continental Automotive | Procédé de gestion d’une pompe à piston pour moteur thermique |
DE102022209910A1 (de) * | 2022-09-21 | 2024-03-21 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren zum Betreiben eines Gasinjektors |
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JP2018509551A (ja) | 2018-04-05 |
CN107208566B (zh) | 2021-04-02 |
TW201632727A (zh) | 2016-09-16 |
US10989186B2 (en) | 2021-04-27 |
TWI713490B (zh) | 2020-12-21 |
DE102015201466A1 (de) | 2016-07-28 |
CN107208566A (zh) | 2017-09-26 |
JP6524246B2 (ja) | 2019-06-05 |
US20180023557A1 (en) | 2018-01-25 |
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