EP1497544A1 - Procede d'utilisation d'un systeme d'injection de carburant destine a un moteur a combustion interne - Google Patents

Procede d'utilisation d'un systeme d'injection de carburant destine a un moteur a combustion interne

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Publication number
EP1497544A1
EP1497544A1 EP03732203A EP03732203A EP1497544A1 EP 1497544 A1 EP1497544 A1 EP 1497544A1 EP 03732203 A EP03732203 A EP 03732203A EP 03732203 A EP03732203 A EP 03732203A EP 1497544 A1 EP1497544 A1 EP 1497544A1
Authority
EP
European Patent Office
Prior art keywords
piezoelectric element
injection
internal combustion
charging
fuel injection
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.)
Granted
Application number
EP03732203A
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German (de)
English (en)
Other versions
EP1497544B1 (fr
Inventor
Andreas-Juergen Rohatschek
Udo Schulz
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
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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
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
    • 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
    • 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
    • F02D41/32—Controlling fuel injection of the low pressure type
    • F02D41/34—Controlling fuel injection of the low pressure type with means for controlling injection timing or duration

Definitions

  • the invention relates to a method for operating a fuel injection system for an internal combustion engine according to the preambles of claims 1 and 6.
  • DE 10033 343 AI discloses a fuel injection system for an internal combustion engine, in particular a diesel engine, which has an injection control for monitoring and / or solving a conflict when actuating the actuator elements, in particular conflict management of overlapping injection profiles of piezo actuators.
  • the object of the invention is to detect edge overlaps, to determine them and to derive the necessary degree of temporal shift or shortening from the overlap area.
  • the edge overlaps are advantageously determined during static and dynamic interrupts of a control circuit during the operation of the injection system. This determination is preferably made as a function of the speed and the crankshaft angle of the internal combustion engine.
  • 3 shows a drive IC
  • 4 shows a time sequence of interrupts known from the prior art
  • Fig. 6 is a schematic representation of moving a lower priority
  • Fig. 7 is a schematic representation of the shortening of a low-priority control.
  • Fig. 1 shows piezoelectric elements 10, 20, 30, 40, 50, 60 and means for driving them.
  • A denotes a region in a detailed representation and B a region in an undetailed representation, the separation of which is indicated by a dashed line c.
  • the area A shown in detail comprises a circuit for charging and discharging the piezoelectric elements 10, 20, 30, 40, 50 and 60.
  • the piezoelectric elements 10, 20, 30, 40, 50 and 60 are Actuators in fuel injection valves (especially in so-called common rail injectors) of an internal combustion engine.
  • six piezoelectric elements 10, 20, 30, 40, 50 and 60 are used to independently control six cylinders within an internal combustion engine; however, any number of piezoelectric elements could be suitable for any other purpose.
  • the area B shown in detail comprises an injection control F with a control unit D and a control IC E which serves to control the elements within the area A shown in detail.
  • the control IC E is supplied with various measured values of voltages and currents from the entire remaining control circuit of the piezoelectric element.
  • the control computer D and the control IC E are designed to regulate the control voltages and the control times for the piezoelectric element.
  • the control computer D and / or the control IC E are also designed to monitor various voltages and currents of the entire control circuit of the piezoelectric element.
  • the individual elements are first introduced within the area A shown in detail. A general description follows of the processes of charging and discharging the piezoelectric elements 10, 20, 30, 40, 50 and 60. Finally, it is described in detail how both processes are controlled and monitored by the control computer D and the drive IC E.
  • the piezoelectric elements 10, 20, 30, 40, 50 and 60 are divided into a first group Gl and a second group G2, each of which comprises three piezoelectric elements (ie, piezoelectric elements 10, 20 and 30 in the first group Gl and piezoelectric elements 40, 50 and 60 in the second group G2).
  • the groups Gl and G2 are components of circuit parts connected in parallel.
  • the group selection switches 310, 320 can be used to determine which of the groups G1, G2 of the piezoelectric elements 10, 20 and 30 or 40, 50 and 60 are respectively discharged with the aid of a common charging and discharging device (the group selection switches 310 are for charging processes) , 320, as described in more detail below, but without meaning).
  • the piezoelectric elements 10, 20 and 30 of the first group G1 are arranged on an actuator bank and the piezoelectric elements 40, 50 and 60 in the second group G2 are arranged on a further actuator bank.
  • An actuator bench is a block in which two or more actuator elements, in particular piezoelectric elements, are permanently arranged, e.g. shed, are.
  • the group selection switches 310, 320 are arranged between a coil 240 and the respective groups Gl and G2 (their coil-side connections) and are implemented as transistors.
  • Drivers 311, 321 are implemented which convert control signals received from the control IC E into voltages which can be selected as required for closing and opening the switches.
  • Diodes 315 and 325 are provided in parallel to the group selection switches 310, 320. If the group selection switches 310, 320 are designed as MOSFETs or IGBTs, these group selection diodes 315 and 325 can, for example, be formed by the parasitic diodes themselves. During charging, the group selection switches 310, 320 are bridged by the diodes 315, 325. The functionality of the group selector switches 310, 320 is therefore reduced to the selection of one Group Gl, G2 of the piezoelectric elements 10, 20 and 30 or 40, 50 and 60 only for one discharge process.
  • the piezoelectric elements 10, 20 and 30 or 40, 50 and 60 are arranged within the groups G1 and G2 respectively as components of the piezo branches 110, 120 and 130 (group G1) and 140, 150 and 160 (group G2) connected in parallel.
  • Each piezo branch comprises a series circuit consisting of a first parallel circuit with a piezoelectric element 10, 20, 30, 40, 50 and 60, and a resistor (referred to as a branch resistor) 13, 23, 33, 43, 53 and 63 and a second Parallel connection with a selector switch designed as a transistor 11, 21, 31, 41, 51 or 61 (referred to as a branch selector switch) and a diode 12, 22, 32, 42, 52 or 62 (referred to as a branch diode).
  • the branch resistors 13, 23, 33, 43, 53 and 63 cause the respective corresponding piezoelectric element 10, 20, 30, 40, 50 and 60 to discharge continuously during and after a charging process, since they each have both capacitive connections Connect piezoelectric elements 10, 20, 30, 40, 50 and 60 to one another.
  • the branch resistors 13, 23, 33, 43, 53 and 63 are of sufficient size to make this process slow compared to the controlled charging and discharging processes, as described below. Therefore, the charge of any piezoelectric element 10, 20, 30, 40, 50 or 60 within a relevant time after a charging process is to be regarded as unchangeable.
  • the branch selector switches / branch diode pairs in the individual piezo branches 110, 120, 130, 140, 150 and 160 can be implemented as electronic switches (ie Transistors) with parasitic diodes, for example MOSFETs or IGBTs (as indicated above for the group selector switches / diode pairs 310 and 315 or 320 and 325).
  • the branch selection switches 11, 21, 31, 41, 51 and 61 can be used to determine which of the piezoelectric elements 10, 20, 30, 40, 50 and 60 are to be charged with the aid of a common charging and discharging device: all are charged in each case those piezoelectric elements 10, 20, 30, 40, 50 and 60, the branch selection switches 11, 21, 31, 41, 51 and 61 are closed during the charging process described below. Usually only one of the branch selection switches is closed.
  • each individual piezoelectric element can be selected for charging processes, while for discharging processes either the first group Gl or the second group G2 of the piezoelectric elements 10, 20 and 30 or 40, 50 and 60, or both, must be selected ,
  • the branch selection piezo connections 15, 25, 35, 45, 55 and 65 can either be made using the branch selection switches 11, 21, 31, 41, 51 and 61 or via the corresponding diodes 12, 22, 32, 42, 52 or 62 and in both cases additionally via resistor 300 to ground.
  • the resistance 300 measures the currents flowing during the charging and discharging of the piezoelectric elements 10, 20, 30, 40, 50 and 60 between the branch selection piezo connections 15, 25, 35, 45, 55 and 65 and ground. Knowledge of these currents enables controlled charging and discharging of the piezoelectric elements 10, 20, 30, 40, 50 and 60. In particular, by closing and opening the charging switch 220 or discharging switch 230 depending on the amount of the currents, it is possible to determine the charging current or to set the discharge current to predetermined mean values and / or to prevent them from exceeding or falling below predetermined maximum values and / or minimum values.
  • a voltage source 621 which supplies a voltage of, for example, 5 V DC
  • a voltage divider in the form of two resistors 622 and 623 are also required for the measurement itself.
  • the control IC E (which carries out the measurements) be protected against negative voltages which could otherwise occur at measuring point 620 and which cannot be controlled by the control IC E: Such negative voltages are obtained by adding one of the above Voltage source 621 and the voltage dividing resistors 622 and 623 positive voltage arrangement supplied changed.
  • the other terminal of the respective piezoelectric element 10, 20, 30, 40, 50 and 60 i.e. the respective group selection piezo connection 14, 24, 34, 44, 54 or 64 can be connected via the group selection switch 310 or 320 or via the group selection diode 315 or 325 as well as via a coil 240 and a parallel connection consisting of a charging switch 220 and a charging diode 221 the positive pole of a voltage source are connected, and alternatively or additionally are grounded via the group selector switch 310 or 320 or via the diode 315 or 325 as well as via the coil 240 and a parallel circuit consisting of a discharge switch 230 and a discharge diode 231.
  • Charge switch 220 and discharge switch 230 are implemented, for example, as transistors which are controlled via drivers 222 and 232, respectively.
  • the voltage source comprises a capacitor 210.
  • the capacitor 210 is charged by a battery 200 (for example a motor vehicle battery) and a downstream DC voltage converter 201.
  • the DC-DC converter 201 converts the battery voltage (for example 12 V) into essentially any other DC voltage (for example 250 V) and charges the capacitor 210 to this voltage.
  • the DC-DC converter 201 is controlled via the transistor switch 202 and the resistor 203, which is used to measure currents tapped at the measuring point 630.
  • control IC E as well as the resistors 651, 652 and 653 and for example a 5 V DC voltage source 654 enable a further current measurement at the measuring point 650; Furthermore, the control IC E and the voltage-dividing resistors 641 and 642 make it possible to measure the voltage at the measuring point 640.
  • a resistor 330 (called a total discharge resistor), a switch 331 (called a stop switch) and a diode 332 (called a total discharge diode) serve to discharge the piezoelectric elements 10, 20, 30, 40, 50 and 60 (if they are outside the normal operator) as described below the DnormalenD unloading process).
  • the stop switch 331 is preferably closed after the normal D discharge processes (cyclical discharge via discharge switch 230) and thereby grounds the piezoelectric elements 10, 20, 30, 40, 50 and 60 via the resistors 330 and 300. In this way, any residual stresses that may remain in the piezoelectric elements 10, 20, 30, 40, 50 and 60 are eliminated.
  • the total discharge diode 332 prevents the occurrence of negative voltages on the piezoelectric elements 10, 20, 30, 40, 50 and 60, which could possibly be damaged by the negative voltages.
  • the common charging and discharging device comprises the battery 200, the DC / DC converter 201, the capacitor 210, the charging switch 220 and the discharging switch 230, charging diode 221 and discharging diode 231 and the coil 240.
  • Each piezoelectric element is charged and discharged in the same way and is explained below with reference to only the first piezoelectric element 10.
  • FIGS. 2A to 2D illustrate the charging of the piezoelectric element 10
  • FIGS. 2C and 2D illustrate the discharging of the piezoelectric element 10.
  • the control of the selection of one or more piezoelectric elements 10, 20, 30, 40, 50 and 60 to be charged or discharged, the charging process described below and the discharging process are carried out by the control IC E and the control device D by opening or Closing one or more of the switches 11, 21, 31, 41, 51, 61; 310, 320; 220, 230 and 331.
  • the interactions between the elements within the detailed area A on the one hand and the control erection IC E and the control computer D on the other hand will be explained in more detail below.
  • a piezoelectric element 10, 20, 30, 40, 50 or 60 to be charged must first be selected.
  • the branch selection switch 11 of the first branch 110 is closed, while all other branch selection switches 21, 31, 41, 51, and 61 remain open.
  • its selection would be made by closing the corresponding branch selection switches 21, 31, 41, 51, and / or 61 ,
  • the charging process can then take place itself:
  • a positive potential difference between the capacitor 210 and group selection piezo connection 14 of the first piezoelectric element 10 is generally required for the charging process.
  • the piezoelectric element 10 is not charged or discharged. In this state, the circuit shown in FIG. 1 is in a stationary state, i.e. the piezoelectric element 10 maintains its state of charge essentially unchanged, with no currents flowing.
  • Switch 220 is closed to charge the first piezoelectric element 10. Theoretically, the first piezoelectric element 10 could be charged by this alone. However, this would result in large currents that could damage the elements in question. Therefore, the currents that occur are measured at measuring point 620 and switch 220 is opened again as soon as the detected currents exceed a certain limit value. In order to achieve any charge on the first piezoelectric element 10, charge switch 220 is therefore repeatedly closed and opened, while discharge switch 230 remains open.
  • FIG. 2A On closer inspection, when the charging switch 220 is closed, the relationships shown in FIG. 2A are obtained, ie a closed circuit comprising a series circuit consisting of the piezoelectric element 10, capacitor 210 and coil 240, a current i LE () flowing in the circuit, as indicated by arrows in FIG. 2A. Because of this current flow, positive charges are both supplied to the group selection piezo connection 14 of the first piezoelectric element 10 and energy is stored in the coil 240.
  • a closed circuit comprising a series circuit consisting of the piezoelectric element 10, discharge diode 231 and coil 240, in the circuit a current ii A ⁇ flows, as indicated by arrows in FIG. 2B. Because of this current flow, energy stored in the coil 240 flows into the piezoelectric element 10. According to the energy supply to the piezoelectric element 10, the voltage occurring in it increases and its external dimensions increase. When the energy has been transferred from the coil 240 to the piezoelectric element 10, the stationary state of the circuit shown in FIG. 1 and already described is reached again.
  • charging switch 220 is closed again and opened again, so that the processes described above run again. Due to the reclosing and reopening of the charging switch 220, the energy stored in the piezoelectric element 10 increases (the energy already stored in the piezoelectric element 10 and the newly supplied energy add up) and the voltage occurring at the piezoelectric element 10 increases and its outer dimensions increase accordingly.
  • the charging switch 220 When the charging switch 220 has been closed and opened a predetermined number of times and / or the piezoelectric element 10 has reached the desired charge state, the charging of the piezoelectric element is ended by leaving the charging switch 220 open.
  • the piezoelectric elements 10, 20, 30, 40, 50 and 60 are discharged in groups (Gl and / or G2) as described below:
  • the group selector switches 310 and / or 320 of the group Gl and / or G2, the piezoelectric elements of which are to be discharged, are closed (the branch selector switches 11, 21, 31, 41, 51, 61 have no influence on the selection of the piezoelectric elements 10, 20, 30, 40, 50, 60 for the discharge process, since in this case they are bridged by the diodes 12, 22, 32, 42, 52 and 62).
  • the first group selection switch 310 is therefore closed.
  • a closed circuit comprising a series circuit consisting of the piezoelectric element 10 and the coil 240, a current flowing in the circuit f), as in FIG 2C indicated by arrows. Because of this current flow, the energy stored in the piezoelectric element (part of it) is transferred to the coil 240. Corresponding to the energy transfer from the piezoelectric element 10 to the coil 240, the voltage occurring at the piezoelectric element 10 drops and its outer dimensions decrease.
  • FIG. 2D If the discharge switch 230 opens shortly (for example, a few ⁇ s) after closing, the conditions shown in FIG. 2D result: a closed circuit comprising a series connection consisting of the piezoelectric element 10, capacitor 210, charging diode 221 and the coil 240 is created , wherein a current i ⁇ A (t) flows in the circuit, as indicated in FIG. 2D by arrows. Because of this current flow, energy stored in coil 240 is returned to capacitor 210. When the energy has been transferred from the coil 240 to the capacitor 210, the stationary state of the circuit shown in FIG. 1 and already described is reached again.
  • discharge switch 230 is closed again and opened again, so that the Operations described above run again. Due to the reclosing and reopening of the discharge switch 230, the energy stored in the piezoelectric element 10 continues to decrease, and the voltage occurring at the piezoelectric element and its external dimensions also decrease accordingly.
  • the discharge switch 230 When the discharge switch 230 has been closed and opened a predetermined number of times and / or the piezoelectric element has reached the desired charge state, the discharge of the piezoelectric element is ended by leaving the discharge switch 230 open.
  • control signals which are via branch selection control lines 410, 420, 430, 440, 450, 460, group selection control lines 510, 520, stop switch control line 530, charge switch control line 540 and discharge switch control line 550 as well as control line 560 are supplied to elements within the region A shown in detail by the control IC E.
  • sensor signals are detected at the measuring points 600, 610, 620, 630, 640, 650 within the region A shown in detail, which are fed to the control IC E via the sensor lines 700, 710, 720, 730, 740, 750.
  • piezoelectric elements 10, 20, 30, 40, 50 and 60 for carrying out charging or discharging processes of individual or more piezoelectric elements 10, 20, 30, 40, 50, 60 by opening and closing the corresponding switches such as As described above, voltages are or are not applied to the transistor bases by means of the control lines.
  • the sensor signals are used, in particular, to determine the resulting voltage of the piezoelectric elements 10, 20 and 30, or 40, 50 and 60 on the basis of the measuring points 600 and 610 and the charge and discharge currents on the basis of the measuring point 620.
  • 3 shows some of the components contained in the control IC E: a logic circuit 800, memory 810, digital-to-analog converter module 820 and comparator module 830.
  • the fast parallel bus 840 (used for control signals) is connected to the logic circuit 800 of the drive IC E, while the slower serial bus 850 is connected to the memory 810.
  • the logic circuit 800 is connected to the memory 810, to the comparator module 830 and to the signal lines 410, 420, 430, 440, 450 and 460; 510 and 520; 530, 540, 550 and 560 connected.
  • the memory 810 is connected to the logic circuit 800 and to the digital-to-analog converter module 820.
  • the digital-to-analog converter module 820 is connected to the comparator module 830.
  • the comparator module 830 is connected to the sensor lines 700 and 710, 720, 730, 740 and 750 and - as already mentioned - to the logic circuit 800.
  • FIG. 4 schematically shows a time sequence of interrupts for programming the start of a main injection HE to be described in more detail below and of two pilot injections VE1 and VE2 as a function of the top dead center of the crankshaft.
  • static interrupts are generated at, for example, approximately 78 ° crankshaft and, for example, at approximately 138 ° crankshaft, by means of which the beginning of the pre-injection VE2 and that directly before the main injection HE are generated horizontal pre-injection VE1 can be programmed.
  • the ends of these injections are then programmed based on dynamic interrupts. It is understood that the above crankshaft angles are only examples. In principle, the interrupts can also be generated at other crankshaft angles. Only the programming of pilot injections was explained above. However, post-injections should also be carried out in a corresponding manner, if such are carried out.
  • the current speed n is determined, this speed n is used in the entire interrupt ("freezing the speed");
  • the known information about the start angle, time offset, start and duration are used for extrapolation taking into account the current speed.
  • the general relationship between speed n, angle phi and time t is:
  • each injection is given a priority. Depending on the system and environmental parameters, each injection is assigned a specific priority. In this way, a distinction is made between low-priority and high-priority controls for each injection pair. It is ensured that a switchover of the priority rities during a calculation process has no negative effects. For example, after the current priority allocation, an overlap detection and measures in the static interrupt can be carried out, then the priorities can be switched, that is to say changed. In the subsequent dynamic interrupts of this pairing, a new priority would have to be used, which in the worst case would result in a measure against the control of an injection with a higher priority (high priority control). Therefore, the consistency of the priority assignment must be ensured even when the priorities are switched.
  • the size of the buffer for different priority sets must be selected so that the maximum possible number of changes to the priority sets can be saved during the entire processing of a pairing.
  • the priority set of a pairing is renewed after it has been completely processed with the current set specified by a priority manager of the electronic control circuit;
  • the distance between the respective start of the two flanks is determined in the time base. Based on this distance, it can be decided whether there is an overlap. Since the flank times are based on the angles of the injections, special attention must be paid to 720 ° KW overflows. In principle, a multitude of implementation options for the distance calculation and evaluation are conceivable. In the embodiment of the method described below, 3 calculations are carried out.
  • the degree of displacement or shortening is determined. It is shifted late in such a way that the low-priority start edge is placed at a time reserve after the expected end of the high-priority edge. The duration is retained when moving.
  • the time of the dynamic interrupt which is coupled to the starting edge at a fixed distance, is also shifted. It is shortened in such a way that the low-priority end flank is shifted early. The time of the starting edge is retained.
  • the decision whether to shift or shorten depends on whether the start edge is already being processed at the time of the overlap detection. If the starting flank is already being processed, which means the beginning of the combustion process, it is no longer possible to move it, it can only be shortened. It follows that all overlaps of low-priority end flanks can only be shortened, since the time of the overlap detection can only be in the dynamic interrupt of the low-priority injection, but this is linked to the execution of the start flank.
  • a displacement is shown as an example in connection with FIG. 6.
  • the overlap is recognized by means of equation (2), the resulting overlap amount t k is directly involved in the degree of the shift.
  • Equation (5) also applies if the overlap was determined from equation (3) or equation (4).
  • Equation (6) also applies if the overlap was determined from equation (3) or equation (4).
  • Secondary collisions occur, for example, if the low-priority start edge is shifted late in the static interrupt, but this collides with the high-priority end edge. The time of the collision detection is then in the dynamic interrupt of the high-priority control. So the low-priority starting flank must be shifted further late in this secondary collision. The same procedure should be followed in the event of tertiary collisions.
  • An advantageous embodiment of the method provides that after a check of all pairings that has ended with the detection of an overlap and the associated measure, all the pairings are run through again until either an abort criterion based on the number of runs occurs or freedom from overlap is detected.
  • undesired overlaps of the time intervals in which one piezoelectric element is to be charged or discharged are detected with a time interval in which the other piezoelectric element zoelectric element is to be loaded or unloaded by calculating the angular ranges used and comparing them with predetermined permissible angular ranges, that is to say collision-free or collision-tolerant angular ranges.
  • the collision-free angular range is understood to mean the angular range that may be covered by the various injection types of a cylinder of the internal combustion engine without overlapping actuations of the actuators.
  • the collision-free angular range is determined, for example, by dividing the value 720 ° crankshaft angle by the number of cylinders, that is to say four.
  • the collision-free angle range is therefore 180 ° crankshaft angle in an internal combustion engine of this type.
  • the crankshaft angle range which is swept from the beginning of the earliest pre-injection to the end of the latest post-injection is referred to as the angle range used.
  • angular range used now exceeds the collision-free angular range, then, for example, a late injection of one cylinder overlaps with an early injection of another cylinder on the same bench.
  • only one actuator may be loaded on a bench at the same time, otherwise a charge equalization would take place, which can lead to a faulty activation.
  • the cylinders can also be combined to form a bank, with several banks being controlled by the same supply unit for loading or unloading.
  • Such an arrangement is called a quasi multi-bank structure.
  • the angular range in which collisions of controls on different banks can be resolved by edge management is referred to as the collision-tolerant range.
  • exceeding the collision-tolerant plus collision-free angular range leads to disturbed control curves.
  • the collision-free angular range is 120 ° crankshaft angle and the collision-tolerant angular range is also 120 ° crankshaft angle.
  • the entire permissible angular range is now determined by the sum of the collision-free angular range and the collision-tolerant angular range, in the case of the 6-cylinder internal combustion engine with quasi-2-bank structure, the permissible angular range corresponds to 240 ° crankshaft angle.
  • the permissible angular range in an internal combustion engine with a quasi-2-bank structure can be determined by dividing the value 720 ° crankshaft angle by the number of cylinders multiplied by the number of banks.
  • the core of this embodiment of the method for operating a fuel injection system for an internal combustion engine is the calculation of the angular range used and the comparison with the permissible angular range, that is to say the collision-free or the sum of the collision-free and collision-tolerant angular range.
  • each interrupt new information that is used to calculate the angular range used is known. The following steps are carried out in each interrupt:
  • Every new angle information is added to the angle range used.
  • a minimum / maximum selection is made from the set of known angle information with the aim of determining the earliest and latest control edge associated with a work cycle.
  • the known angle range used is determined from the angle information of the earliest and latest control edges by forming the difference.
  • the entire angle range used is known from the earliest pre-injection to the latest post-injection, the general relationship between speed n angle phi and time t having already been explained above in the form of equation (1).
  • the known angular range used is compared with the predetermined collision-free and collision-tolerant angular ranges. If the range is exceeded, an error message is issued and the range is quantified.
  • Options for responding to an error message are now a) a corresponding shift of a low-priority injection, so that the angular range used is again within the permissible range; b) taking into account the error message and the degree of overrange during the next activation at the same or similar operating point.

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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

L'invention concerne un procédé d'utilisation d'un système d'injection de carburant destiné à un moteur à combustion interne, consistant à contrôler si un intervalle de temps au cours duquel un élément piézoélectrique destiné à injecter du carburant dans un cylindre, doit être chargé ou déchargé, déborde sur un autre intervalle de temps au cours duquel un autre élément piézoélectrique destiné à injecter du carburant dans un autre cylindre, doit être chargé ou déchargé. Le procédé selon l'invention est caractérisé en ce qu'il consiste à contrôler si le chargement ou le déchargement d'une injection de priorité inférieure se déroule à l'instant d'un chargement ou déchargement d'une injection de priorité supérieure. Lors du fonctionnement dudit système d'injection de carburant, les écarts des flancs de chargement et/ou de déchargement (superposition de flancs) sont déterminés et le niveau de décalage et/ou de raccourcissement des injections de priorité inférieure par rapport aux injections de priorité supérieure est ainsi déterminé.
EP03732203A 2002-04-09 2003-04-08 Procede d'utilisation d'un systeme d'injection de carburant destine a un moteur a combustion interne Expired - Lifetime EP1497544B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10215609 2002-04-09
DE10215609 2002-04-09
DE10310955 2003-03-13
DE10310955A DE10310955A1 (de) 2002-04-09 2003-03-13 Verfahren zum Betrieb einer Kraftstoffeinspritzanlage für einen Verbrennungsmotor
PCT/DE2003/001154 WO2003085247A1 (fr) 2002-04-09 2003-04-08 Procede d'utilisation d'un systeme d'injection de carburant destine a un moteur a combustion interne

Publications (2)

Publication Number Publication Date
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US (1) US6983731B2 (fr)
EP (1) EP1497544B1 (fr)
JP (1) JP2005522616A (fr)
DE (2) DE10310955A1 (fr)
WO (1) WO2003085247A1 (fr)

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WO2008092827A1 (fr) * 2007-02-02 2008-08-07 Continental Automotive Gmbh Dispositif et procédé de contrôle d'une injection de carburant
WO2010089219A1 (fr) * 2009-02-06 2010-08-12 Continental Automotive Gmbh Procédé et dispositif permettant de faire fonctionner un moteur à combustion interne
DE102016207036A1 (de) 2016-04-26 2017-10-26 Continental Automotive Gmbh Verfahren und Vorrichtung zur Steuerung der Kraftstoffeinspritzung bei einer Brennkraftmaschine

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DE102004016894A1 (de) * 2004-04-06 2005-10-27 Robert Bosch Gmbh Kraftstoffeinspritzanlage für einen Verbrennungsmotor und Verfahren zum Betreiben einer solchen
EP1847705B1 (fr) * 2006-04-12 2012-09-26 Delphi Technologies Holding S.à.r.l. Dispositif et procédé de commande d'injecteur piézo-électrique
DE102006034419A1 (de) * 2006-07-25 2008-01-31 Siemens Ag Vorrichtung und Verfahren zum Betreiben von Stellgliedern
JP5007204B2 (ja) * 2007-11-12 2012-08-22 ボッシュ株式会社 インジェクタドライバ回路
DE102008047384A1 (de) 2008-09-16 2010-04-15 Continental Automotive Gmbh Verfahren zum Definieren oder Vergeben von Einspritz-Zeitabschnitten für Kraftstoffinjektoren, sowie Verfahren zum Ansteuern von Kraftstoffinjektoren
DE102009025480B3 (de) 2009-06-18 2011-01-13 Continental Automotive Gmbh Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine
DE102013214828A1 (de) 2013-07-30 2015-02-05 Robert Bosch Gmbh Verfahren zum Betrieb eines Einspritzsystems einer dreizylindrigen Brennkraftmaschine, insbesondere eines Kraftfahrzeugs
DE102016213522B4 (de) * 2016-07-22 2023-10-12 Vitesco Technologies GmbH Verfahren und Vorrichtung zur Ansteuerung eines Piezoaktors eines Einspritzventils eines Kraftfahrzeugs

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DE10033343A1 (de) 2000-07-08 2002-01-17 Bosch Gmbh Robert Kraftstoffeinspritzanlage für einen Verbrennungsmotor
DE10039786A1 (de) * 2000-08-16 2002-02-28 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008092827A1 (fr) * 2007-02-02 2008-08-07 Continental Automotive Gmbh Dispositif et procédé de contrôle d'une injection de carburant
DE102007005361B3 (de) * 2007-02-02 2008-10-09 Continental Automotive Gmbh Vorrichtung und Verfahren zur Steuerung der Kraftstoffeinspritzung
US8095295B2 (en) 2007-02-02 2012-01-10 Continental Automotive Gmbh Device and method for controlling fuel injection
WO2010089219A1 (fr) * 2009-02-06 2010-08-12 Continental Automotive Gmbh Procédé et dispositif permettant de faire fonctionner un moteur à combustion interne
DE102016207036A1 (de) 2016-04-26 2017-10-26 Continental Automotive Gmbh Verfahren und Vorrichtung zur Steuerung der Kraftstoffeinspritzung bei einer Brennkraftmaschine
WO2017186397A1 (fr) 2016-04-26 2017-11-02 Continental Automotive Gmbh Procédé et dispositif de commande de l'injection de carburant dans un moteur à combustion interne
DE102016207036B4 (de) * 2016-04-26 2018-01-25 Continental Automotive Gmbh Verfahren und Vorrichtung zur Steuerung der Kraftstoffeinspritzung bei einer Brennkraftmaschine

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WO2003085247A1 (fr) 2003-10-16
JP2005522616A (ja) 2005-07-28
US20050235965A1 (en) 2005-10-27
DE50302294D1 (de) 2006-04-13
US6983731B2 (en) 2006-01-10
DE10310955A1 (de) 2003-11-06
EP1497544B1 (fr) 2006-01-25

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