EP3289212A1 - Procédé pour augmenter la précision d'une détection de pression sans capteur - Google Patents

Procédé pour augmenter la précision d'une détection de pression sans capteur

Info

Publication number
EP3289212A1
EP3289212A1 EP16719059.4A EP16719059A EP3289212A1 EP 3289212 A1 EP3289212 A1 EP 3289212A1 EP 16719059 A EP16719059 A EP 16719059A EP 3289212 A1 EP3289212 A1 EP 3289212A1
Authority
EP
European Patent Office
Prior art keywords
pressure value
electric motor
variables
fuel
external state
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
EP16719059.4A
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.)
Vitesco Technologies 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 EP3289212A1 publication Critical patent/EP3289212A1/fr
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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/077—Fuel tanks with means modifying or controlling distribution or motion of fuel, e.g. to prevent noise, surge, splash or fuel starvation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0088—Testing machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03243—Fuel tanks characterised by special pumps, the mounting thereof
    • 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
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0201—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
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0209—Rotational speed
    • 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
    • F04B2205/05—Pressure after the pump outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/82—Forecasts
    • F05D2260/821—Parameter estimation or prediction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/30—Control parameters, e.g. input parameters
    • F05D2270/304—Spool rotational speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/30—Control parameters, e.g. input parameters
    • F05D2270/335—Output power or torque

Definitions

  • the invention relates to a method for determining a pressure value in a fluid delivery system of a motor vehicle, with a controllable electric motor and with a
  • Fluid delivery pump which is driven by the electric motor.
  • the aim is to make the fuel delivery system as simply and cost while maintaining particular the number of individual components used ge ⁇ ring.
  • DE 38 35 672 AI discloses a method which relies on measured values of pressure sensors, which are respectively arranged upstream and downstream of the motor fuel pump ⁇ .
  • DE 199 35 237 B4 discloses a method for determining the load state one by a feed pump angeord ⁇ Neten fuel filter, downstream of the fuel filter ⁇ a pressure sensor is arranged.
  • a disadvantage of these devices and the drive ⁇ Ver used is particular in that the accuracy of the printer ⁇ averaging is not optimal, and particularly the Druckbestim- mung, is not optimal in extreme operating conditions, such as extreme driving conditions.
  • An embodiment of the invention relates to a method for determining a pressure value in a fluid handling system of a motor vehicle, with a controllable electric motor and with a fluid discharge pump which can be driven by the electrical ⁇ rule engine, the method comprising the nachfol ⁇ constricting steps of:
  • ⁇ determining a drive current of the electric motor, ⁇ determining a pressure value as a function of the rotational speed and the drive current of the electric motor,
  • a power ⁇ -transfer system for example, can be meant or alternatively, a fluid delivery system for the promotion of an oil or a coolant.
  • the invention will be described below on the basis of a force substance delivery system.
  • a transfer to other fluid delivery systems of a motor vehicle is possible.
  • the fluid supply pump is formed by a KraftStoff characteristicpumpe.
  • the determination of the rotational speed can preferably take place by means of a sensor or, alternatively, be determined from other control variables within the force-conveying system.
  • the driving Ström which describes the current which is passed from an electric motor ⁇ associated control unit to the electric motor can also be determined by sensor or in the course of a calculation.
  • An external state variable is in this case in particular, a characteristic that does not belong directly to the fuel delivery system, such as a Tempe ⁇ ture that was originally collected or calculated for a different purpose.
  • the ex ternal ⁇ state variable is involved with directly or indirectly, in the determination of the pressure value.
  • an offsetting of the determined pressure value with the external state variable can be provided. It can also be meant by the processing that a comparison of the pressure detected with the external state variable takes place to determine, for example, a Plausibili ⁇ tion of the pressure value or the veracity of the pressure ⁇ value.
  • a correction of the pressure value may mean that, depending on the processing, the unchanged pressure value is maintained or an adjustment is made up or down. The correction is made dependent in particular on the processing of the determined pressure value with the external state variables.
  • the drive current of the elec tric ⁇ motor in response to the at least one ex ternal ⁇ state variable and / or the determined pressure value and / or the corrected pressure value by the control device is fitted arrival.
  • the external state variables are formed at least partially by measured variables and / or calculated variables from other control devices and / or sensors of the motor vehicle. Measurements are preferably used, which are sums already ER of ande ren ⁇ installed in the motor vehicle sensors or subsystems. These include in particular temperature sensors, sensors for detecting the fuel quality, the accelerator ⁇ position, gear selection or similar.
  • these include sensors that are needed for combustion in the internal combustion engine or the exhaust gas treatment, such as the lambda probe, pressure sensors or air mass and air mass ⁇ diameter.
  • measured variables can be tightened in advantageous embodiments as external state variables.
  • External state variables such as the speed, the current or projected fuel consumption ⁇ he or torque of the engine herangezo- be gen particularly preferred.
  • information on the state of the start-stop system or the position of the ignition are preferred state variables to ⁇ .
  • the outer ⁇ temperature or the temperature of the high-pressure pump which is responsible for the high-pressure pumping of fuel comparable applies to.
  • the external state variables can be obtained in particular from models stored in the vehicle electronics.
  • the models can preferably reproduce the entire vehicle model form, or in each case only single part ⁇ areas. It may depict particular different Fahrzustän ⁇ de in the models that allow due to a detected driving condition statements about certain
  • Models can in turn relate ⁇ A input data from other controllers and / or sensors of the vehicle electronics. Also stored Kennfel can be used to the ⁇ to supply the models with input values.
  • a preferred embodiment is characterized gekennzeich ⁇ net, that the model, from which the external state variables originate a filed as emergency operation program for the vehicle rear map corresponds.
  • An emergency program is in this context, in particular, a program that allows limited operation of the power ⁇ vehicle, if for example by error messages or sensor failures regular vehicle operation is not guaranteed.
  • This includes, for example, a runflat ⁇ program for the internal combustion engine, which thereby is characterized ⁇ that a necessary amount of fuel for FEH ⁇ lerelle operation is calculated on the basis of selected operating data of the engine and hence a necessary speed of the fuel feed pump is derived.
  • the Rege ⁇ development of the fuel quantity here is no longer optimal, son ⁇ countries only designed so that a damaged-free operation is possible. It is also preferable if the model is used to close from known quantities of unknown quantities, which comprises in the model ⁇ empirically determined data sets and / or determined by simulation records to determine the unknown quantities.
  • the model used or the models used in each case form a reduced representation of the reality, which output one or more output variables in response to a specification of defined input variables.
  • different working algorithms can be stored in the model.
  • the driving current of the electric motor is limited, both in terms of the maximum value and the minimum value to ensure that the Kraftstoff hand- pump only in a matching to the respective driving situation Be ⁇ operating range, in particular rotational speed range, is operated.
  • the values determined by the sensorless pressure control of the fuel pump can be checked for the speed of the fuel feed pump or the drive current. Unusual values that do not match the actual prevailing situation can thus be recognized and operation of the fuel pump with a wrong speed and thus a wrong delivery volume can be avoided.
  • Pressure value is a calibration of the fuel supply system ⁇ taken before ⁇ .
  • calibrations into ⁇ special already occurred can be checked with regard to their quality or it can be generated Korrekturwer ⁇ te, achieve an improvement in quality.
  • This is for example advantageous if for the determination of the pressure value in the fuel delivery system, a KraftStofftem- was temperature of 20 ° as the basis, the fuel but has currently a higher temperature, for example 60 °, where ⁇ has by the fuel other flow properties and thus affect the pressure detection becomes.
  • Hinzu- pull the external state variable can take place situationsge ⁇ right adjusting the pressure value determination, whereby the control performance of the system is improved.
  • At least one external state variable flows directly into the determination of the pressure value.
  • Egg ⁇ ne external state variable for example, the speed or the drive current of the electric motor directly striking ⁇ enced can be used particularly advantageous to determine the pressure value directly. This may be, for example, the detectable by the lambda probe ethanol content of the fuel ⁇ substance.
  • at least one exter ⁇ ne state variable is used for the indirect determination of an internal state of the fuel delivery system.
  • the outside temperature may be used to predict the starting fuel temperature in the fuel tank based on it. For example, can be closed on the temperature of the fuel feed pump ⁇ and in particular the temperature of the winding of the electric motor from the fuel temperature in the tank, creating a situation-onsoptimierter operation is made possible.
  • An internal state variable is, in particular, a state variable which allows a statement about a specific element or component of the fuel-supply system.
  • Figure 1 is a flow chart illustrating the process OF INVENTION ⁇ to the invention
  • Fig. 2 is a block diagram showing an example of the on ⁇ construction of a model in a simulation program, while the transition from external shown to ⁇ was large from a vehicle-side model in a controller, the determination of the
  • FIG. 1 shows a flow chart 1, which represents the process according OF INVENTION ⁇ dung.
  • the speed of the electric motor which drives the KraftStoff componentpumpe detected.
  • the drive current of the electric motor is detected. Both observations can be done in a variety of ways by known methods.
  • a pressure value is determined based on the determined speed and the determined drive current of the electric motor. This pressure value reflects the pressure in the fuel to be delivered.
  • a processing of the determined pressure value is carried out with at least one external state variable.
  • the processing can be done in many ways. In addition to a settlement, a comparison of the values can take place or a correction. Depending on the external state variable used, the type of processing may vary with the pressure value determined.
  • a correction of the pressure value follows.
  • the pressure value previously determined depending on the processing with the external state variables Corridor ⁇ is yaws.
  • the corrected pressure value can be as basic ⁇ location for further calculations or processing herangezo ⁇ gen again.
  • a targeted adjustment of the on-control current of the electric motor can be made to change the delivery ⁇ performance of KraftStoff compoundpumpe.
  • the arrow 7 symbolizes the forwarding of the Corridor ⁇ alloyed pressure value, for example, to another Steuerge advises ⁇ .
  • the arrow 7 may also represent a taking place in Depending ⁇ ness of the corrected pressure value adapted arrival control of the electric motor. This allows a better adapted to the given conditions Kraft ⁇ material delivery achieved by the KraftStoff componentpumpe ⁇ the.
  • FIG. 2 shows a schematic overview 8 in the form of a block diagram.
  • 2 shows a block 9 is shown, which corresponds to a model, as it can be deposited in the vehicle ⁇ example in a control unit.
  • Block 9 symbolizes this model.
  • these blocks 10 to 15 represent individual input variables that can be read into the model 9.
  • the input variables can, as already described in the preceding part of the description, be formed by very different values. Among other things, measured values of sensors or calculated values. Examples of these are values such as Mo ⁇ tornaviere, fuel consumption, outside temperature, the temperature of the fuel high pressure pump or the power ⁇ material quality called.
  • the input variables are tet within the model 9 ⁇ proces. These include in particular weights and Berechnun ⁇ gene.
  • the individual values are combined in the beam 16 and individually ⁇ passed further into selected shape or a combined signal along the signal line section 17 to the block 18.
  • the block 18 symbolizes a control unit which serves to control the electric motor of the fuel pump.
  • this control unit 18 can via the signal line 19 and other state variables or external requirements be supplied.
  • the processing of the determined values for the drive current of the electric motor and the value for its speed occurs with one or more of the external state variables.
  • a control signal may be returned to the electric motor from the controller 18, whereby an on ⁇ adjustment of the rotational speed of the electric motor can be achieved.
  • Figures 1 and 2 are not of a limiting nature and serve to illustrate the inventive concept.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Computer Hardware Design (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

L'invention concerne un procédé de détermination d'une valeur de pression dans un système d'alimentation en fluide d'un véhicule automobile, comportant un moteur électrique pouvant être commandé et une pompe d'alimentation en fluide, qui peut être entraînée par le moteur électrique. Le procédé comprend les étapes consistant à : - déterminer une vitesse de rotation du moteur électrique, - déterminer un courant de commande du moteur électrique, - déterminer une valeur de pression en fonction de la vitesse de rotation et du courant de commande du moteur électrique, traiter la valeur de pression déterminée avec au moins une grandeur d'état externe dans une unité de commande, et – corriger la valeur de pression déterminée.
EP16719059.4A 2015-04-27 2016-04-25 Procédé pour augmenter la précision d'une détection de pression sans capteur Ceased EP3289212A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015207710.1A DE102015207710B4 (de) 2015-04-27 2015-04-27 Verfahren zur Erhöhung der Genauigkeit einer sensorlosen Druckerfassung
PCT/EP2016/059161 WO2016173980A1 (fr) 2015-04-27 2016-04-25 Procédé pour augmenter la précision d'une détection de pression sans capteur

Publications (1)

Publication Number Publication Date
EP3289212A1 true EP3289212A1 (fr) 2018-03-07

Family

ID=55858754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16719059.4A Ceased EP3289212A1 (fr) 2015-04-27 2016-04-25 Procédé pour augmenter la précision d'une détection de pression sans capteur

Country Status (6)

Country Link
US (1) US10232704B2 (fr)
EP (1) EP3289212A1 (fr)
KR (1) KR101981881B1 (fr)
CN (1) CN107532586B (fr)
DE (1) DE102015207710B4 (fr)
WO (1) WO2016173980A1 (fr)

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DE102015207702B3 (de) * 2015-04-27 2016-07-28 Continental Automotive Gmbh Verfahren zur Regelung eines Kraftstofffördersystems
DE102018217230A1 (de) * 2018-10-09 2020-04-09 Robert Bosch Gmbh Verfahren und Vorrichtung zur Ansteuerung einer Fluidpumpe
CN112177803B (zh) * 2020-08-26 2021-07-23 湖北三江航天红林探控有限公司 一种基于气压预测的分时点火控制方法及系统
DE102022207540A1 (de) * 2022-07-25 2024-01-25 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zur Ermittlung eines Drucks in einem Kraftstofftank
CN115303292A (zh) * 2022-08-25 2022-11-08 蔚来动力科技(合肥)有限公司 液压系统故障诊断方法、车辆驱动系统的控制方法及车辆

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DE4446277A1 (de) * 1994-12-23 1996-06-27 Bosch Gmbh Robert Kraftstoffversorgungssystem für eine Brennkraftmaschine
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Also Published As

Publication number Publication date
WO2016173980A1 (fr) 2016-11-03
DE102015207710B4 (de) 2018-09-27
KR20170136622A (ko) 2017-12-11
KR101981881B1 (ko) 2019-05-23
DE102015207710A1 (de) 2016-10-27
CN107532586A (zh) 2018-01-02
US20180126844A1 (en) 2018-05-10
CN107532586B (zh) 2019-06-18
US10232704B2 (en) 2019-03-19

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