WO2020143980A1 - Dispositif de commande pour injecteurs - Google Patents

Dispositif de commande pour injecteurs Download PDF

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Publication number
WO2020143980A1
WO2020143980A1 PCT/EP2019/084631 EP2019084631W WO2020143980A1 WO 2020143980 A1 WO2020143980 A1 WO 2020143980A1 EP 2019084631 W EP2019084631 W EP 2019084631W WO 2020143980 A1 WO2020143980 A1 WO 2020143980A1
Authority
WO
WIPO (PCT)
Prior art keywords
injector
control device
control
voltage
electrical
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/EP2019/084631
Other languages
German (de)
English (en)
Inventor
Siegfried Lehmann
Karl Stengel
Markus Vogel
Daniel Strack
Martin Maier
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2020143980A1 publication Critical patent/WO2020143980A1/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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • 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
    • 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
    • F02D41/3005—Details not otherwise provided for

Definitions

  • the invention relates to a control device for the electrical control of injectors, in particular fuel injectors for injecting a
  • Test medium for measuring the quantity of test medium or fuel in the combustion chamber of an internal combustion engine.
  • Test devices for testing injectors each comprise a control device for electrically controlling an injector to be tested.
  • injectors in particular solenoid valve injectors and piezo injectors, which have to be controlled differently.
  • solenoid valve injectors and piezo injectors, which have to be controlled differently.
  • piezo injectors To the different types of fuel! To be able to control and test the injectors, different control devices are therefore required.
  • Control device for the electrical control of injectors, in particular fuel injectors, at least one electrical interface which is designed to electrically connect the control device to at least one electrically controllable injector.
  • the control device also includes at least one switching device.
  • the switching device is designed such that it makes it possible to change the electrical activation of the at least one injector connected to the electrical interface.
  • the switching device is in particular designed to enable the electrical activation of the at least one injector to be adapted to different injector types.
  • Embodiments of the invention also include a test device for testing injectors, in particular fuel injectors, with a
  • Control device which is designed according to an embodiment of the invention.
  • the electrical control can be adapted to the respective injector type.
  • different injector types can therefore optionally be controlled, and it is not necessary to provide a separate control device for each injector type.
  • the electrical control of injectors, in particular the electrical control of injectors for test purposes, can therefore be considerably simplified.
  • the at least one switching device is designed to control the drive voltage, i.e. to change the electrical voltage with which at least one injector is controlled.
  • At least one switching device is designed in particular to control the control voltage between a first, high
  • Drive voltage for example a drive voltage of more than 30 V
  • second, low drive voltage for example one
  • the at least one switching device is designed such that it enables the polarity of the control voltage to be switched.
  • the control device has at least one inductance, in particular a coil, which is optionally in series with at least one an injector to be controlled and optionally an ohmic resistor or a current measuring element.
  • the inductance forms an LC element.
  • control device has an H-bridge circuit which is designed such that at least one injector to be controlled can be controlled by the H-bridge circuit.
  • An H-bridge circuit enables a simple and effective way to include at least one injector
  • control device is designed in such a way that at least one injector to be controlled can optionally consist of one
  • Constant voltage source or electrically controllable from a variable voltage source. In this way, at least one injector can be controlled effectively with different electrical voltages.
  • the constant voltage source can be, for example, an electrical one
  • the constant voltage source can be any DC voltage of 12 V or 24 V, as is typically used in automotive electronics.
  • the constant voltage source can be any DC voltage of 12 V or 24 V, as is typically used in automotive electronics.
  • the constant voltage source can be any DC voltage of 12 V or 24 V, as is typically used in automotive electronics.
  • the constant voltage source can be any DC voltage of 12 V or 24 V, as is typically used in automotive electronics.
  • the constant voltage source can be any DC voltage of 12 V or 24 V, as is typically used in automotive electronics.
  • variable voltage source can be designed to provide electrical voltages, in particular direct voltages, of up to 250 V, as are used in particular for the electrical control of piezo injectors.
  • Both the variable voltage source and the constant voltage source can be designed to deliver currents of up to 30 A, so that
  • Injectors especially magnetic valve injectors, with a high
  • Peak power consumption can be controlled.
  • the at least one switching device comprises a plurality of switches.
  • the switches can be used as relays and / or as transistors,
  • MOSFET MOS Field effect transistors
  • Free-wheeling diodes can be connected in parallel with the switches.
  • control device additionally comprises a changeover switch, which enables at least one injector for the electrical
  • Voltage source provided voltage is applied directly to the injector.
  • the changeover switch can comprise, for example, a high-voltage relay, which is designed for switching high voltages.
  • control device comprises two or more electrical interfaces, each of the electrical interfaces being designed in each case for electrically connecting the control device to an injector. In this way, several injectors can be used with the
  • Control device connected and optionally controlled electrically.
  • the efficiency of controlling and testing several injectors can be increased even further in this way.
  • Figure 1 shows a circuit diagram of a control device 2 according to a
  • Figures 2a and 2b each show a table of different combinations of switching states (switching state combinations) for electrical
  • Figure 3a shows the course of the voltage when electrically actuating a solenoid valve injector with a control device according to an embodiment of the invention.
  • FIG. 3b shows the course of the electrical current when electrically actuating a solenoid valve injector with a control device according to one
  • Figures 4a and 4b each show a table of different switching state combinations for the electrical control of a piezo injector.
  • FIG. 5a shows the course of the voltage when electrically actuating a piezo injector with a control device according to an exemplary embodiment of the invention.
  • FIG. 5b shows the course of the electrical current when electrically actuating a piezo injector with a control device according to an embodiment of the invention.
  • FIG. 6 shows a circuit diagram of a control device according to a further exemplary embodiment of the invention.
  • FIG. 7 shows a schematic representation of a test device for testing injectors, which is designed according to an exemplary embodiment of the invention.
  • FIG. 1 shows a circuit diagram of a control device 2, which according to a
  • Embodiment of the invention is designed to control at least one injector 4 to be tested.
  • a fixed voltage source 6 e.g. a battery, represents a constant
  • DC voltage for example a DC voltage U 6 of 12 V or 24 V, is available.
  • a variable voltage source 8 provides an adjustable direct voltage Us, in particular a direct voltage Ue of up to 250 V.
  • the fixed voltage source 6 and the variable voltage source 8 can each be selectively connected to a live line 14 of an H-bridge circuit 10 via a switch S6, S7. Parallel to the switch S7, which is the variable If voltage source 8 is selectively connected to bridge circuit 10, a freewheeling diode D7 is provided.
  • the H-bridge circuit 10 comprises a first one (on the left in FIG. 1)
  • Branch 12 with a first switch S1 and a second switch S2, which are arranged in series between the live line 14 and ground 16 and connected to them.
  • a freewheeling diode S2 is connected in parallel with the second switch S2.
  • the forward direction of the free-wheeling diode D2 is opposite to the voltage applied to the live line 14, so that the free-wheeling diode D2 blocks the voltage applied to the live line 14. (The voltage of the live line 14 is only present at the freewheeling diode D2 when the switch S1 is closed.)
  • the H-bridge circuit 10 also comprises a second branch 18 (shown on the right in FIG. 1) with a third switch S3 and a fourth switch S4, which are arranged in series between the live line 14 and ground 16 and are connected to the latter.
  • a free-wheeling diode D4 is connected, the forward direction of which is opposite to the voltage applied to the live line 14, so that the free-wheeling diode D4 blocks the voltage applied to the live line 14. (The voltage of the live line 14 is only present at the diode D4 when the switch S3 is closed.)
  • a first connection 41 of the injector 4 to be tested is connected via an electrical interface 36 to a first electrical connection point PI between the first and the second switch S1, S2.
  • a second connection 42 of the injector 4 to be tested is connected via the electrical interface 36 to a second electrical connection point P2 between the third and fourth switches S3, S4.
  • Connection points P2 are an inductance L, in particular a coil, and an optional ohmic resistor R or a current measuring element switched.
  • the inductance L can be bridged by a fifth switch S5, which is connected in parallel to the inductance L.
  • the level and the polarity of the voltage U applied to the injector 4 between the connections 41 and 42 can be set such that injectors 4
  • the inductance L can be switched on in order to limit the speed of the current rise through the injector 4.
  • FET field effect transistors
  • MOSFET MOS field effect transistors
  • Free-wheeling diodes D2, D5, D7, as shown in FIG. 1, are dispensed with.
  • the control device 2 also comprises a controller 20 which is designed to suitably control the switches S1-S7 in order to test the function of an injector 4 electrically connected to the connection points PI and P2.
  • the controller 20 may include a pre-programmed electrical circuit 27.
  • the controller 20 may also include a programmable microprocessor 27 on which a program runs which causes the
  • Controller 20 controls switches S1-S7 electrically in accordance with a predetermined test program in order to test injector 4.
  • the controller 20 can have an input device 25 which makes it possible to select the type of injector 4 to be tested and / or a test program to be carried out.
  • the input device 25 can comprise, for example, at least one selector switch, a keyboard and / or a touch-sensitive screen (“touchscreen”).
  • FIGS. 2a, 2b, 3a and 3b show by way of example the electrical actuation of a magnetic valve injector 4 with a control device 2 according to an exemplary embodiment of the invention.
  • FIG. 2a shows a table of different switching state combinations ZI to Z4 of switching states of the switches S1-S7. "+" Means that the corresponding switch S1-S7 is closed, and means that the respective switch S1-S7 is open.
  • FIG. 3a shows the course of the voltage U applied to the injector 4 and FIG. 3b shows the course of the current I flowing through the injector 4 on the y-axis as a function of the time t plotted on the x-axis.
  • the fifth switch is S5
  • a first switching state combination ZI of the switch positions (see FIG. 2a) generates a first pulse IP1 (see FIG. 3a).
  • a first pulse IP1 see FIG. 3a.
  • Switching state combination ZI is the switch S7 on the variable
  • the voltage source 8 set voltage Ue is generally higher than the voltage U 6 provided by the fixed voltage source 6 .
  • the first pulse IP1 has a duration of 100 ps to 150 ps, for example, and causes a first current increase 21 (see FIG. 3b) and an opening of a (not explicitly shown) solenoid valve in the injector 4.
  • the H-bridge circuit 10 is separated from the variable voltage source 8 by opening the switch S7.
  • the switching state combination Z4 forms a second pulse IP2 with the voltage Ue at the opposite polarity on the injector 4 in order to close the injector 4.
  • switches S1-S7 are activated accordingly, a similar voltage pattern is generated in which the polarity at the connection points PI, P2 is interchanged.
  • Corresponding switching state combinations ZI 'to Z4' for a solenoid valve injector 4 are shown in FIG. 2b.
  • An injector 4 electrically connected to the connection points PI, P2 can thus be driven with voltages of opposite polarity without the electrical connection of the injector 4 to the control circuit 2
  • Figures 4a, 4b, 5a and 5b show an example of the electrical control of a piezo injector 4 with a control device 2 according to an exemplary embodiment of the invention.
  • Figure 4a shows a table of different switching state combinations ZI to Z4 of the switches S1-S7.
  • “+” means that the corresponding switch S1-S7 is closed, and means that the corresponding switch S1-S7 is open.
  • FIG. 5a shows the course of the voltage U applied to the injector 4 and FIG. 5b shows the course of the current I flowing through the injector 4 on the y-axis as a function of the time t plotted on the x-axis.
  • the switch S5 When a piezo injector 4 is driven electrically, the switch S5 is open. Due to the open switch S5, the inductance L is connected in series with the piezo injector 4 and, in combination with the intrinsic capacitance of the piezo injector 4, forms an LC element which determines the speed of the Rise in the electric current I flowing through the piezo injector 4 is limited.
  • an opening of a (not explicitly shown) piezo valve in the injector 4 is achieved, for example, in a period of approximately 80ps to 200ps.
  • variable voltage source 8 In the switching state combination ZI, the switches S1, S4 and S7 are closed, so that the voltage Ue of the variable voltage source 8 is applied to the injector 8.
  • the variable voltage source 8 is generally set such that it outputs a voltage Ue of more than 200V, in particular a voltage Ue between 200 V and 250 V.
  • the voltage U applied to the injector 4 increases continuously during the opening process (to ⁇ t ⁇ ti) (see FIG. 5a).
  • the injector 4 After opening, the injector 4 is kept in an open state for a predetermined period T (ti ⁇ t ⁇ 2). The applied to the injector 4
  • the injector 4 is closed again by periodically switching between the switching state combinations Z3 and Z4.
  • the voltage U at the injector 4 falls back to 0 V at the time ⁇ 3 (see FIG. 5a).
  • the switches S1-S4 can control the polarity by correspondingly controlling the
  • Connection points PI, P2 can be exchanged.
  • Corresponding switching state combinations for a piezo injector 4 are shown in FIG. 4b.
  • FIG. 6 shows a circuit diagram of a control device 2 according to a further exemplary embodiment of the invention.
  • the structure of the H-bridge circuit 10 for electrically actuating an injector 4, 4a, 4b to be tested with voltages U 6 , Us of different heights and polarities corresponds to the first exemplary embodiment shown in FIG.
  • the first branch 12 of the H-bridge circuit 10 is double, i.e. the first branch 12 comprises a first partial branch 12a and a second partial branch 12b.
  • the two branches 12a and 12b are identical to one another and each comprise two switches Sla, S2a, Slb, S2b, which are each arranged in series between the live line 14 and ground 16 and are electrically connected to them.
  • a connection point Pia, Plb is provided between the two switches Sla, S2a, Slb, S2b of each branch 12a, 12b, which makes it possible to electrically connect an injector 4a, 4b to the respective branch 12a, 12b.
  • two injectors 4a, 4b can be electrically connected to the control device 2 at the same time and controlled by suitable control of the switches Sla, S2a, Slb, S2b, S3 to S7.
  • a changeover switch 30a, 30b is additionally provided between each of the connection points Pia, Plb and the respective injector 4a, 4b.
  • the changeover switches 30a, 30b make it possible to selectively switch each of the injectors 4a, 4b instead of with the respective branch 12a, 12b of the H-bridge circuit directly, i.e. via an eighth switch S8.
  • the double formation of the first branch 12 of the H-bridge circuit 10, as shown in FIG. 6, is independent of the changeover switches 30a, 30b. That is, a changeover switch 30a, 30b, as shown in FIG. 6, can also be added to an H-bridge circuit 10, which has only a single first branch 12, as shown in FIG. 1. Likewise, a control device 2 with a double first Branch 12, 12a, 12b, as shown in FIG. 6, can also be formed without the changeover switches 30a, 30b and the eighth switch S8.
  • the first branch 12 is more than twice, i.e. n-fold (n> 2), so that at the same time n injectors 4, 4a, 4b can be electrically connected to the control device 2.
  • the second branch 18 can also have multiple designs.
  • FIG. 7 shows a schematic representation of a test device 32 according to an embodiment of the invention, which is designed for testing two injectors 4a, 4b.
  • the test device 32 comprises two receptacles 34a, 34b with electrical interfaces 36a, 36b. Each of the two receptacles 34a, 34b is designed to receive and electrically contact one injector 4a, 4b.
  • the test device 32 also includes a control device 2, which is designed according to an embodiment of the invention.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

La présente invention concerne un dispositif de commande (2) destiné à la commande électrique d'injecteurs (4), en particulier d'injecteurs de carburant, comprenant au moins une interface électrique (36), qui est conçue pour raccorder électriquement le dispositif de commande (2) à au moins un injecteur (4). Le dispositif de commande (2) comprend également au moins un dispositif de commutation (S1-S8), qui permet de modifier la commande électrique de l'au moins un injecteur (4) raccordé à l'interface électrique (36) et en particulier de l'adapter à différents types d'injecteurs. L'invention concerne en outre un dispositif d'essai (32) destiné aux essais des injecteurs (4), en particulier des injecteurs de carburant, comprenant un tel dispositif de commande (2).
PCT/EP2019/084631 2019-01-09 2019-12-11 Dispositif de commande pour injecteurs Ceased WO2020143980A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019200179.3A DE102019200179A1 (de) 2019-01-09 2019-01-09 Ansteuervorrichtung für Injektoren
DE102019200179.3 2019-01-09

Publications (1)

Publication Number Publication Date
WO2020143980A1 true WO2020143980A1 (fr) 2020-07-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/084631 Ceased WO2020143980A1 (fr) 2019-01-09 2019-12-11 Dispositif de commande pour injecteurs

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DE (1) DE102019200179A1 (fr)
WO (1) WO2020143980A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1962571A1 (de) * 1969-12-13 1971-09-02 Bosch Gmbh Robert Simulator fuer elektronischen Dieselregler
EP0325960A2 (fr) * 1988-01-27 1989-08-02 Adam Opel Aktiengesellschaft Appareil de commande électronique pour véhicule
DE4326327A1 (de) * 1993-08-05 1994-09-29 Daimler Benz Ag Elektronisches Steuergerät für ein Kraftfahrzeug
DE19527353A1 (de) * 1995-07-26 1997-01-30 Bayerische Motoren Werke Ag Elektronisches Steuergerät für ein Aggregat eines Kraftfahrzeugs
DE69413206T2 (de) * 1993-11-19 1999-03-25 Robert Bosch Gmbh, 70469 Stuttgart Kraftstoffeinspritzsteuervorrichtung für eine brennkraftmaschine
DE10215610A1 (de) * 2001-04-10 2002-10-17 Bosch Gmbh Robert System und Verfahren zum Korrigieren des Einspritzverhaltens von mindestens einem Injektor
WO2003038265A1 (fr) * 2001-10-29 2003-05-08 International Engine Intellectual Property Company, Llc. Systeme et procede permettant de calibrer des injecteurs de carburant
DE10203766A1 (de) * 2002-01-30 2003-07-31 Deutz Ag Elektronische Motorregelung
DE602004002748T2 (de) * 2003-11-25 2007-08-16 C.R.F. Società Consortile per Azioni, Orbassano Ansteuervorrichtung für induktive elektrische Aktoren
CN108459586A (zh) * 2018-05-25 2018-08-28 中车青岛四方车辆研究所有限公司 基于虚拟仪器的复用自动测试台及测试方法

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1962571A1 (de) * 1969-12-13 1971-09-02 Bosch Gmbh Robert Simulator fuer elektronischen Dieselregler
EP0325960A2 (fr) * 1988-01-27 1989-08-02 Adam Opel Aktiengesellschaft Appareil de commande électronique pour véhicule
DE4326327A1 (de) * 1993-08-05 1994-09-29 Daimler Benz Ag Elektronisches Steuergerät für ein Kraftfahrzeug
DE69413206T2 (de) * 1993-11-19 1999-03-25 Robert Bosch Gmbh, 70469 Stuttgart Kraftstoffeinspritzsteuervorrichtung für eine brennkraftmaschine
DE19527353A1 (de) * 1995-07-26 1997-01-30 Bayerische Motoren Werke Ag Elektronisches Steuergerät für ein Aggregat eines Kraftfahrzeugs
DE10215610A1 (de) * 2001-04-10 2002-10-17 Bosch Gmbh Robert System und Verfahren zum Korrigieren des Einspritzverhaltens von mindestens einem Injektor
WO2003038265A1 (fr) * 2001-10-29 2003-05-08 International Engine Intellectual Property Company, Llc. Systeme et procede permettant de calibrer des injecteurs de carburant
DE10203766A1 (de) * 2002-01-30 2003-07-31 Deutz Ag Elektronische Motorregelung
DE602004002748T2 (de) * 2003-11-25 2007-08-16 C.R.F. Società Consortile per Azioni, Orbassano Ansteuervorrichtung für induktive elektrische Aktoren
CN108459586A (zh) * 2018-05-25 2018-08-28 中车青岛四方车辆研究所有限公司 基于虚拟仪器的复用自动测试台及测试方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JEEVA B ET AL: "Development of custom-made engine control unit for a research engine", 2014 2ND INTERNATIONAL CONFERENCE ON EMERGING TECHNOLOGY TRENDS IN ELECTRONICS, COMMUNICATION AND NETWORKING, IEEE, 26 December 2014 (2014-12-26), pages 1 - 6, XP032737562, DOI: 10.1109/ET2ECN.2014.7044943 *

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