WO2016193187A1 - Procédé pour déterminer la pression régnant dans un système de refoulement de fluide - Google Patents

Procédé pour déterminer la pression régnant dans un système de refoulement de fluide Download PDF

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Publication number
WO2016193187A1
WO2016193187A1 PCT/EP2016/062101 EP2016062101W WO2016193187A1 WO 2016193187 A1 WO2016193187 A1 WO 2016193187A1 EP 2016062101 W EP2016062101 W EP 2016062101W WO 2016193187 A1 WO2016193187 A1 WO 2016193187A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric motor
pressure
torque
fluid delivery
fluid
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.)
Ceased
Application number
PCT/EP2016/062101
Other languages
German (de)
English (en)
Inventor
Gerald BEHRENDT
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.)
Aumovio Germany GmbH
Original Assignee
Continental Automotive Technologies GmbH
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
Application filed by Continental Automotive Technologies GmbH filed Critical Continental Automotive Technologies GmbH
Publication of WO2016193187A1 publication Critical patent/WO2016193187A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure
    • F02D2200/0604—Estimation of fuel pressure
    • 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
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems

Definitions

  • the invention relates to a method for determining the pressure in a fluid delivery system, with a fluid delivery pump and with an electric motor, wherein the fluid delivery pump can be driven by the electric motor and the electric motor can be actuated by a drive signal.
  • Fluid delivery systems such as fuel delivery systems, are used to deliver fluid.
  • fuel is conveyed from a fuel tank to an internal combustion engine.
  • fluid delivery systems regularly have a fluid delivery pump that can be driven by an electric motor.
  • the electric motor can be controlled by different control signals such ⁇ that represent the different speeds at the electric motor a ⁇ .
  • ⁇ represent the different speeds at the electric motor a ⁇ .
  • the influences resulting from the design of the fluid delivery pump and the remaining fluid delivery system must also be taken into account in order to precisely determine the delivered fluid quantity.
  • One of the most important influencing factors is the pressure in the fluid delivery system, against which the fluid delivery pump has to deliver.
  • the pressure in the fluid delivery system is therefore an important ⁇ An influencing factor, which is advantageously known to allow mög ⁇ lichst optimal and energy-efficient operation of Fluidför- dersystems.
  • a fluid delivery system is always beschrie ⁇ ben in its suitable for different fluids general form.
  • a particularly preferred embodiment of a fluid delivery system is a fuel delivery system, which is used to tion of fuel from a fuel tank to a Ver ⁇ internal combustion engine is used.
  • the power ⁇ material supply pump used for this purpose is preferably designed especially for use in ei ⁇ nem corrosive medium such as fuel.
  • the statements and made in Nachfol ⁇ constricting the features described are particularly applicable to one as a fuel delivery system having formed ⁇ tes fluid delivery system.
  • An embodiment of the invention relates to a method for determining the pressure in a fluid delivery system, with a fluid delivery pump and with an electric motor, wherein the fluid delivery pump is driven by the electric motor and the
  • Electric motor can be controlled by a drive signal, wherein the following method steps are performed:
  • the pressure in the fluid delivery system is an important parameter to control the fluid pump at any time as precisely as possible and thus the produced fluid quantity to agree ⁇ precisely as possible be. This is useful to ensure demand-driven fluid delivery. Here, it is ⁇ geous particularly present when the pressure can be determined as accurately as possible using the shortest possible time offset. This increases the Re ⁇ gelgüte of the fluid delivery system, which total an energy- ⁇ efficient operation of the fluid delivery system can be achieved.
  • the fluid delivery pump has a pump stage that can be driven by the electric motor, whereby in the case of a Kraftofofbe refinesystems the fuel from the fuel tank can be promoted to the engine.
  • the use of a method which does not require values from a pressure sensor, is advantageous because the system complexity can be reduced and the fluid transport system also kos ⁇ ten redesigner can be produced.
  • the determination of the elekt ⁇ innovative power of the electric motor to the considered time, by a known power measuring device he ⁇ follow or alternatively conveyor system from known state quantities of the fluid and in particular the electric motor is calculated ⁇ to.
  • the determined electric power of the electric motor can be resolved in a further step towards the torque of the electric motor.
  • the torque of the electric motor that drives the fluid delivery pump is in a substantially proportional relationship to the pressure in the fluid delivery system.
  • the exact relationship between the pressure and the torque is specific to each Fluid freshly- system and can either be ⁇ true by empirical test series or determined by a suitable simulation. Knowing the speed of the respective Elektromo ⁇ tors or the fluid feed pump and the respective torque the pressure in the fluid delivery system accurately be ⁇ true can be.
  • the pressure in the fluid delivery system is proportional to the torque of the electric motor.
  • the propor ⁇ ality allows easy determining the pressure with few computational steps, if the torque is known.
  • the proportionality factor is specific to each fluid delivery system and can be determined either empirically or simulatively.
  • another mathematical together ⁇ link between the pressure in the fluid delivery system and the Torque ⁇ ment may prevail, which can be determined by appropriate empirical tests or simulations.
  • a preferred embodiment is characterized in that the relationship between the torque of the electric motor and the pressure prevailing in the fluid delivery system pressure via a specific for the particular fluid delivery system provides map Herge ⁇ is.
  • the maps can be preferably determined empirically in an identi ⁇ rule comparison system or generated simula ⁇ tively.
  • the maps obtained are preferably stored in a control unit used for the control of the fluid delivery system in order to access them for determining the pressure can.
  • the pump-specific characteristic map has the normalized torque.
  • a normalization of the Torque ⁇ ment is particularly advantageous to compensate for speed-related effects, such as friction in the bearings, and thus to make a more accurate determination of the pressure can.
  • the map represents the rotational ⁇ moment on the prevailing pressure in the fluid delivery system for un ⁇ different speeds of the electric motor or the fluid delivery pump. This is advantageous in order to determine the pressure in the fluid delivery system on simp ⁇ che manner with regard to the torque and speed.
  • the relationship between the torque of the electric motor and the pressure prevailing in the fluid delivery system pressure is determined by an empirically determined or determined by simulation conversion rule where ⁇ with the conversion rule specific for the respective Flu ⁇ ideausystem or for individual components of the Fluid once- Systems is.
  • the conversion rule can be formed for example by a formula wherein the depending ⁇ wells known values can be used in the formula to obtain the jeweili ⁇ gen pressure.
  • a complete map can be created, which allows the determination of the pressure.
  • the Umticiansvor ⁇ writing is specific for each fluid delivery system and is particularly used by the fluid delivery pump which USAGE ⁇ Deten lines and the enced in the flow path of the fluid, to affect ⁇ child elements, such as the filter.
  • the electrical power is determined by a power meter or is calculated from state variables of the electric motor.
  • the state variables are formed by the current flowing to the electric motor and / or the rotational speed ⁇ number of the electric motor and / or voltage applied to the electric motor. These state variables are particularly advantageous since they can be determined in a simple manner and allow a fast and reliable calculation of the electrical power.
  • 1 is a block diagram illustrating the method for determining the torque of the electric motor from the electric power of the electric motor
  • FIG 2 shows a diagram which shows a characteristic diagram valid for a specific fluid delivery system, the torque of the electric motor being shown above the pressure in the fluid delivery system at different rotational speeds of the electric motor, a diagram showing the values of the characteristic diagram of FIG 2, wherein the torque shown is normalized,
  • Fig. 4 is a block diagram of the next to the ge Service ⁇ th in Figure 1 Determination of the torque of the motor also to determine the pressure based on the in figure
  • Fig. 5 is a block diagram for illustrating the inventions ⁇ inventive method. Preferred embodiment of the invention
  • FIG. 1 shows a block diagram 1.
  • the determination of the torque of the electric motor from the electric power of the electric motor is shown.
  • the previously either measured or calculated elec tric ⁇ power is provided.
  • the value for the electrical power can be provided for example via the block 3 and the other on ⁇ applications.
  • the value for the electrical power is fed into the block 5.
  • the value is divided by a constant which is passed from block 6 to block 5.
  • the constant is formed by the value 2n, where n means the circle number Pi.
  • n means the circle number Pi.
  • the block 7 from the given from ⁇ result corresponds to the torque of the electric motor and can be passed via the block 9 in other applications.
  • FIG. 2 shows a diagram 10.
  • a pressure in the unit bar is removed, wherein in theticiansbei ⁇ game of Figure 2, the pressure starting from the zero point 13 to ⁇ takes up to eight bar.
  • the torque of the electric motor is plotted from zero at zero point 13 to 0.0045 Ncm at the upper end of the Y-axis 12.
  • the curves 14 to 20 show the course of the torque over the pressure for under ⁇ different speeds.
  • the curve 14 shows the course for 2000 rpm, the curve 15 for 3000 rpm, the curve 16 for 4000
  • FIG. 3 shows a diagram 21, which likewise shows the pressure in the unit bar on the X-axis 22 and the torque in the unit Ncm on the Y-axis 23.
  • the set of curves 24 shows a plurality of curves, each for the speeds ste ⁇ hen that have already been explained in FIG. 2
  • Figure 3 is only one specific embodiment for a particular fluid delivery system.
  • FIG 4 shows at the top of the ge already in figure 1 showed ⁇ block diagram 1 for determining the torque of the electric power.
  • the figure shows a block diagram WEI ter the determination of the output block 29 in pressure in the Flu ⁇ ideausystem.
  • the torque is supplied to the block 26.
  • the block 26 is also a speed ⁇ leads, which is passed from the path 8 in the block 27.
  • the speed-related effects are compensated.
  • a compensation of the torque takes place from path 25 with the adjusted in block 27 speed.
  • the result is given in the map shown in block 28.
  • the Kenn ⁇ field corresponds to one of the maps of Figures 2 or 3. From this map is finally in block 28, the pressure in the fluid delivery system and refinedge ⁇ ben over the block 29.
  • FIG. 5 shows a block diagram 30, which illustrates the method according to the invention.
  • the elec tric ⁇ power of the motor is determined. This can be done by means of a measuring method or by a calculation.
  • Figures 1 to 5 have insbesonde ⁇ re not restrictive in nature and serve to Verdeut ⁇ lichung the inventive concept. They represent a specific embodiment of a fluid delivery system. However, the qua ⁇ litative course is similar for differently designed fluid delivery systems.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

L'invention concerne un procédé pour déterminer la pression régnant dans un système de refoulement de fluide, qui comprend une pompe de refoulement de fluide et un moteur électrique, la pompe de refoulement de fluide pouvant être entraînée par le moteur électrique et le moteur électrique pouvant être excité par un signal d'excitation, les étapes de procédé suivantes étant exécutées : détermination de la puissance électrique du moteur électrique, calcul du couple du moteur électrique sur la base de la puissance électrique déterminée, détermination de la pression régnant dans le système de refoulement de fluide au moyen du couple.
PCT/EP2016/062101 2015-06-03 2016-05-30 Procédé pour déterminer la pression régnant dans un système de refoulement de fluide Ceased WO2016193187A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015210245.9A DE102015210245A1 (de) 2015-06-03 2015-06-03 Verfahren zur Ermittlung des Drucks in einem Fluidfördersystem
DE102015210245.9 2015-06-03

Publications (1)

Publication Number Publication Date
WO2016193187A1 true WO2016193187A1 (fr) 2016-12-08

Family

ID=56092910

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/062101 Ceased WO2016193187A1 (fr) 2015-06-03 2016-05-30 Procédé pour déterminer la pression régnant dans un système de refoulement de fluide

Country Status (2)

Country Link
DE (1) DE102015210245A1 (fr)
WO (1) WO2016193187A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4446277A1 (de) * 1994-12-23 1996-06-27 Bosch Gmbh Robert Kraftstoffversorgungssystem für eine Brennkraftmaschine
DE19625902A1 (de) * 1995-06-28 1997-03-20 Nippon Denso Co Kraftstoffversorgungssystem für einen Verbrennungsmotor und Verfahren zu dessen Einstellung
US20120156057A1 (en) * 2010-12-17 2012-06-21 Aisan Kogyo Kabushiki Kaisha Fuel supply apparatus
WO2012089400A1 (fr) * 2010-12-27 2012-07-05 Robert Bosch Gmbh Système d'alimentation en carburant pour un moteur à combustion interne
EP2610528A2 (fr) * 2011-12-28 2013-07-03 Jtekt Corporation Unité de pompe électrique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010064181A1 (de) * 2010-12-27 2012-06-28 Robert Bosch Gmbh Kraftstoffversorgungssystem für eine Brennkraftmaschine mit einer Kraftstoff-pumpe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4446277A1 (de) * 1994-12-23 1996-06-27 Bosch Gmbh Robert Kraftstoffversorgungssystem für eine Brennkraftmaschine
DE19625902A1 (de) * 1995-06-28 1997-03-20 Nippon Denso Co Kraftstoffversorgungssystem für einen Verbrennungsmotor und Verfahren zu dessen Einstellung
US20120156057A1 (en) * 2010-12-17 2012-06-21 Aisan Kogyo Kabushiki Kaisha Fuel supply apparatus
WO2012089400A1 (fr) * 2010-12-27 2012-07-05 Robert Bosch Gmbh Système d'alimentation en carburant pour un moteur à combustion interne
EP2610528A2 (fr) * 2011-12-28 2013-07-03 Jtekt Corporation Unité de pompe électrique

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