EP1979598A1 - Dispositif pour commander des soupapes d'injection de carburant inductives - Google Patents

Dispositif pour commander des soupapes d'injection de carburant inductives

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Publication number
EP1979598A1
EP1979598A1 EP07704077A EP07704077A EP1979598A1 EP 1979598 A1 EP1979598 A1 EP 1979598A1 EP 07704077 A EP07704077 A EP 07704077A EP 07704077 A EP07704077 A EP 07704077A EP 1979598 A1 EP1979598 A1 EP 1979598A1
Authority
EP
European Patent Office
Prior art keywords
coil
current
terminal
opening
transistor
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
EP07704077A
Other languages
German (de)
English (en)
Other versions
EP1979598B1 (fr
Inventor
Stephan Bolz
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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
Priority claimed from DE200610025360 external-priority patent/DE102006025360B3/de
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP1979598A1 publication Critical patent/EP1979598A1/fr
Application granted granted Critical
Publication of EP1979598B1 publication Critical patent/EP1979598B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02D2041/2024—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit the control switching a load after time-on and time-off pulses
    • F02D2041/2027—Control of the current by pulse width modulation or duty cycle control
    • 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
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/2068—Output circuits, e.g. for controlling currents in command coils characterised by the circuit design or special circuit elements
    • F02D2041/2072—Bridge circuits, i.e. the load being placed in the diagonal of a bridge to be controlled in both directions
    • 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
    • F02D2041/2068—Output circuits, e.g. for controlling currents in command coils characterised by the circuit design or special circuit elements
    • F02D2041/2075—Type of transistors or particular use thereof
    • 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
    • F02D2041/2068—Output circuits, e.g. for controlling currents in command coils characterised by the circuit design or special circuit elements
    • F02D2041/2079—Output circuits, e.g. for controlling currents in command coils characterised by the circuit design or special circuit elements the circuit having several coils acting on the same anchor

Definitions

  • the invention relates to a device for switching inductive fuel injection valves according to claim 1 or 6.
  • Characteristics of these systems are very high fuel injection pressures of more than 2000 bar (diesel) and more than 10% (gasoline), as well as the supply of fuel in several injections per injection.
  • fuel is injected at periodic intervals even in the exhaust stroke to achieve about the regeneration of a particulate filter in the exhaust system by burning off the soot particles.
  • valve switching times 100 to 500 ⁇ s are required in order to inject at the high system pressures even the smallest amounts of fuel down to a few micrograms with high accuracy and high temporal precision.
  • the piezoelectric ceramic used here responds to a change in the control voltage spontaneously with a change in volume of the injected fuel quantity, a very fast, almost lag-free actuation of the injectors mög ⁇ is Lich.
  • the classic solenoid valve first has to build up a current flow in the inductance excitation winding, which then, but only after reaching a certain current value, can actuate the valve.
  • a typical example of this is large-volume, slow-running diesel truck engines, such as 9-liter 6-cylinder engines with maximum operating speeds of around 1800 rpm.
  • the requirements for the smallest injection quantities are also reduced because of the large displacement.
  • the number of injection pulses per injection process is lower because, for example, a pre-injection to reduce the diesel-typical "Nageins" can be omitted because of the already quite high noise of the truck engine.
  • solenoid injection valves are in principle suitable for such applications, they still require some further development. Thus, for use in direct injection systems with standard solenoid valves, which have a coil (winding) for the magnetic opening and a spring for closing the valve, the closing delay must be reduced.
  • the main obstacle when closing such a standard sole- noidventils are the eddy currents in the magnetic material of Ven ⁇ tils, which decay after switching off the operating current only long ⁇ sam and prevent rapid closing of the valve. This behavior defines the minimum valve opening ⁇ time and thus increases the lowest possible fuel input injection quantity.
  • FIG. 1 shows a known basic circuit arrangement for operating a coil of a fuel injection valve with PWM (Pulse Width Modulation) operation.
  • PWM Pulse Width Modulation
  • one terminal of the coil L1 is connected to the positive pole V + of a supply voltage source V by means of a first switching transistor T1, and the other terminal is connected to reference potential GND by means of a second switching transistor T2.
  • the source terminal of the first switching transistor Tl is connected to one terminal of the coil Ll, its drain terminal to the positive terminal V +.
  • the source terminal of the two ⁇ th switching transistor T2 is connected to reference potential GND verbun ⁇ the and its drain terminal to the other terminal of the coil Ll.
  • a freewheeling diode Dl of reference potential GND is arranged to conduct current to one terminal of the coil Ll and a recuperation diode D2 from the other At the end of the coil Ll, it is electrically conducted to the positive pole V + of the supply voltage source.
  • switching transistor Tl Upon reaching a predetermined upper current setpoint at which the valve opens, switching transistor Tl is switched non-conducting by means of the PWM unit PWM and the coil current now flows through the coil L1 via the freewheeling diode D1 and switching transistor T2, wherein it slowly drops. If the current now reaches a lower predetermined setpoint value, switching transistor T1 is again turned on, whereupon the coil current increases again.
  • both switching transistors Tl and T2 are simultaneously switched non-conducting, whereupon the coil Ll discharges via the freewheeling diode Dl and the recuperation diode D2 into the supply voltage source V. and the valve closes.
  • FIG. 2 shows the voltage curve in the upper trace and the current trace in the opening coil L1 during the opening duration of a standard fuel injection valve in the lower trace.
  • FIG. 3 shows the principle of a bistable fuel injection valve.
  • the valve needle 1 is mounted ver ⁇ pushed in a housing 4 and shown in the "OPEN" position. It lies on the left iron yoke 2.
  • the left iron return 2 encloses the opening coil AB (rectangles A and B with bevel). By a previous actuation current in the opening coil AB, the left iron yoke was magnetized, so that now, when the current subsides, it holds the valve needle 1 in the "OPEN" position.
  • the term "fuel” may also be a "hydraulic medium", wherein instead of a fuel circuit, a hydraulic circuit may be provided, by means of which a fuel injection valve is controlled with hydraulic pressure over ⁇ tion.
  • an actuating current is now passed through the closing coil C-D, so that the valve needle 1 moves to the right iron yoke 3.
  • the valve needle 1 is held in the "CLOSED" position by the magnetization of the right-hand iron yoke 3.
  • outlets b and c are connected to the return lines r, which are designed as a ring line, which reduce the fuel pressure between the outlets b, c and the valve nozzles, not shown, whereby the valve is closed.
  • bistable valve Since a bistable valve has two coils, namely one
  • Opening and a closing coil the circuit arrangement according to FIG. 1 is to be provided twice per valve: once for operating Ben the opening coil AB (Ll in Figure 1) and once for Be ⁇ drive the closing coil CD.
  • Such processes are also known, for example, from DE 199 21 938 A1, DE 195 26 681 A1 and DE 40 16 816 A1.
  • the object of the invention is to provide an improved device for accelerated switching of inductive fuel injection valves, which in bistable valves, the opening and the closing delay, and reduced in standard solenoid valves (with closing spring), the closing delay.
  • valve switching times are known to be reduced when in a bistable valve, the magnetic holding forces are eliminated when activating a coil by deliberately clearing the remanence of the other coil, and in a standard valve (with closing spring) - induced by the decaying eddy currents - magnetic holding forces Disabling the coil can be eliminated.
  • FIG. 1 shows a known, basic circuit arrangement for the PWM operation of an inductive fuel injection valve
  • FIG. 2 shows the voltage and current profiles during PWM operation of the fuel injection valve according to FIG. 1, FIG.
  • FIG. 3 shows a detailed view of a bistable fuel injection valve
  • FIG. 4 shows a circuit arrangement according to the invention for the PWM operation of an inductive fuel injection valve
  • FIG. 5a shows the voltage and current profile at the current mirror of the circuit arrangement according to the invention
  • Figure 5b the timing of operating current and negative current when opening and closing a bistable valve.
  • FIG. 8 shows a circuit arrangement according to the invention for operating a plurality of valve coils
  • FIG. 9 shows the time profile of the valve switching movements, without (9a) and with degaussing current (9b),
  • FIG. 10 shows a further circuit arrangement, FIG.
  • FIG. 11 shows a control unit for the circuit arrangement according to FIG. 10,
  • FIG. 12 shows the signal curves in this control unit
  • FIG. 13 shows a control unit for the circuit arrangement according to FIG
  • FIG. 10 a schematic representation of a standard
  • Solenoid injection valve and Figure 15: the formation of transient, opposite
  • FIG. 4 shows a circuit arrangement according to the invention for the PWM operation of a coil, for example the opening coil L1 of an inductive fuel injection valve.
  • the Steue for ⁇ tion of the valve-Be-powered current circuit part used (Tl, T2, Dl, D2) is already explained in the description of FIG. 1
  • the one terminal of the coil Ll for example, the opening coil of the valve by means of Ers ⁇ th switching transistor Tl to the positive terminal V + of the supply voltage source V and the other terminal connected by means of the two ⁇ th switching transistor T2 with reference potential GND.
  • the source terminal of the first switching transistor Tl is connected to one terminal of the coil L1 - its drain terminal to the positive terminal V +.
  • the source terminal of the second switching transistor T2 is connected to reference potential GND, its drain terminal to the other terminal of the coil Ll.
  • the free-wheeling diode Dl is arranged to conduct current from reference potential GND for a terminal of the coil Ll and disposed toward the recuperated energy peration diode D2 conducting current le from the other terminal of the Spu ⁇ Ll to the positive pole V + of the supply voltage source.
  • the circuit is extended by five transistors T3 to T7, five resistors Rl to R5, a capacitor Cl and a Di ⁇ ode D3 and to the inclusion of existing in the vehicle on-board voltage source Vbat.
  • the third transistor T3 is connected in parallel with the free-wheeling diode D1: its source terminal is connected to reference potential GND, its drain terminal to the connection point of freewheeling diode D1 and the one terminal of the coil L1. It serves to connect in the current-conducting state connected to the first switching transistor Tl terminal of the coil Ll with reference potential GND.
  • the transistors T4 to T6 together with the resistors R2 to R4 form a complementary Darlington current mirror, which supplies a negative current.
  • This current mirror T4-T6 is connected via a first resistor Rl to the positive pole V + of the supply voltage V.
  • the source terminal of the fourth transistor T4 is connected to the other terminal of the coil Ie L1, while the source terminal of the sixth transistor T6 is connected via the series circuit of the seventh transistor T7 and the fifth resistor R5 with dustspotenti ⁇ al GND.
  • the gate terminals of the third Tran ⁇ sistor T3 and the seventh transistor T7 are connected to each other and to the output of a control device, which is shown in Figure 6 or 7, for generating a control signal negative current control NSC for the negative current.
  • a capacitor Cl is connected, which is charged by the Bordthesesquel ⁇ le Vbat via a protective diode D3 and the current mirror T4-T6 supplied with energy, which by Current source switched seventh transistor T7 is controlled.
  • this transistor T3 and also the seventh transistor T7 is non-conducting, so that at the output of the current mirror, through the source terminal of the fourth transistor T4 is formed, too no electricity flows.
  • the circuit is inactive, no current flows through the coil Ll in the negative direction (in the direction from transistor T4 to transistor T3).
  • the control signal NSC to high level jumps (for example, + 5V)
  • the third transistor T3 is turned on and connects the one terminal of the coil Ll with dustspotenti ⁇ al GND.
  • the seventh transistor T7 a current whose size by the value of the fifth resistor R5 and the base voltage (+ 5V) of the seventh
  • Transistor T7 minus its base-emitter voltage (5V-0.7V ⁇ 4.3V) is determined.
  • this current also flows through the sixth transistor T6 and the third resistor R3, at which it generates a voltage drop.
  • the principle of a current mirror with emitter resistors (to negative current Kopp ⁇ lung) of the fifth transistor T5 and the second resistor R2 will develop the same voltage drop between the base terminal. If one now chooses the value of resistor R2 much lower than the value of R3, a correspondingly higher current through R3 is required for this:
  • the fifth transistor T5 forms, together with the fourth transistor T4, a complementary Darlington transistor. Accordingly, the principal portion of the current flowing through the two ⁇ th resistor R2, the current I R2 flowing through the fourth transistor T4.
  • negative current pulse capacitor Cl is connected by means of the first resistance is used Rl to the potential of the supply voltage V + (at ⁇ game as + 48V) charged.
  • V + at ⁇ game as + 48V
  • a negative current here is a current through the opening or closing coil defined in the direction of the actuating current opposite direction.
  • R1 is selected to be so high that its current flow is substantially lower than the negative current flowing through the second resistor R2 and the fourth transistor T4. However, the value of R1 must be small enough to allow the capacitor C1 to be charged to the potential V + in the pauses between two consecutive negative current pulses.
  • capacitor C1 is now discharged and its voltage becomes lower than the on-board voltage Vbat.
  • the protection diode D3 becomes conductive and capacitor Cl clamped on board voltage Vbat. This ensures that at the beginning of a negative current pulse enables high versor ⁇ supply voltage V + a rapid current build-up in the coil Ll and the further course is low enough to bring into being by no ne unnecessary power dissipation in the fourth transistor T4.
  • FIG. 5a shows the voltage and current profile at the current mirror T4-T6, wherein the upper track shows the voltage U C i at the capacitor C1.
  • the voltage U C i decreases until it is clamped at about 11.3V.
  • the voltage U C i rises again to V +.
  • the lower trace shows the negative current pulse I L1 .
  • the setpoint of 2A is already reached after 38 ⁇ s.
  • bistable valves it has been shown that the duration of the negative current pulse is set to the time period should ⁇ to which surfaces of the current in the other coil for achievement requires its operating value.
  • the control signal NSC can be obtained in a simple manner. Suffice it a flip-flop which is set at the start of valve activation and is the first achievement of the operating current turn Retired ⁇ can be.
  • Figure 6 shows a circuit of such a control device with a bistable valve for the negative current through the one coil, for example the opening coil Ll, by the closing signal of the other coil, for example the closing coil.
  • This circuit consists only of a flip-flop IClA.
  • the flip-flop IClA terminal CLK
  • the output of the PWM unit PWM (see FIGS. 2 and 4) connected to the terminal CLR-not of the flip-flop IClA receives high level at this time. Reaches the current through the closing coil its operating value, this output switches to low level and thus also clears the flip-flop ICLA, so that the output signal of NSC at the output Q to the low level reset jumps to ⁇ .
  • the base terminal of the Transisto ⁇ ren T3 and T7 of the circuit for the opening coil Ll ⁇ signal supplied NSC has high level as long as the current through the closing coil until the first achievement of its operating value.
  • a circuit according to FIG. 4 and FIG. 6 is required for generating the negative current for both the opening and closing coils.
  • the opening of the valve associated with the PWM unit controls the negative current pulse in the coil of the closing Ven ⁇ TILs and associated with the closure of the valve PWM unit controls the negative current pulse in the coil of the valve opening.
  • the time profile of operating current and ne ⁇ negative flow for opening and closing a bistable valve is shown schematically in Figure 5b.
  • the negative current is used to delete the eddy currents that continue to flow after power-off and decay in the opening coil still in Mag ⁇ net Vietnamese of the standard valve.
  • the circuit according to FIG. 7 contains a timer (monoflop IC2) for determining the duration of the negative current pulses through the coil Ll, which is triggered by the inverted by an inverter IC4 falling edge of the signal EO.
  • a timer (monoflop IC2) for determining the duration of the negative current pulses through the coil Ll, which is triggered by the inverted by an inverter IC4 falling edge of the signal EO.
  • diode D1 can be dispensed with, the substrate diode of transistor T3 assuming its function, the freewheel.
  • the supply of the Darlington current mirror is made of a capacitor, which is first charged to the potential of the supply voltage V + to achieve a rapid increase in current in the coil inductance.
  • the negative current is controlled by a signal from the drive electronics, which controls the current flow in the respective opposite coil.
  • the negative current is controlled by the falling edge of the actuation (opening) signal.
  • the energy required for demagnetization can also be acted upon accelerated. This is useful when a mög ⁇ lichst faster onset of valve movement is required.
  • There- to the negative current is not set with a predetermined, largely constant value for a certain period of time, as shown in FIG 5a, but as an approximately triangular current pulse with a predetermined maximum value (Figure 9b).
  • the rate of current rise is doing right by the inductance of the coil and the supply voltage V be ⁇ . Also, the peak value of the current is higher than in the first embodiment because the demagnetizing energy is provided in a shorter time.
  • valve switching times without (FIG. 9a) and with the demagnetizing current (FIG. 9b) are compared with one another. There each show: - the upper track: the demagnetizing current,
  • FIG. 1 A circuit diagram for such a circuit arrangement is shown in FIG.
  • the circuit corresponds essentially to the embodiment of Figure 4, but eliminates resistor Rl, capacitor Cl, diode D3 and the connection to the on-board voltage source Vbat. Also, the resistors R2 and R3 are connected directly to the positive pole V + of the supply voltage, and between the source terminal of transistor T3 and the ground terminal GND, a resistor R7 is inserted.
  • the current source T4-T6 is now designed by selecting the value ratio of the resistors R2 and R3 for a much higher constant current - for example 8A.
  • the valve switching time determined in a measured exemplary embodiment of the circuit according to FIG. 10 is shortened, for example, from 620 ⁇ s (without degaussing current, FIG. 9a) to 504 ⁇ s (with degaussing current, FIG. 9b).
  • the current source T4-6 also has a protective function, since in case of a short circuit of the right terminal of the coil Ll to reference potential of the current from T6 is limited.
  • valve coils are located in the injector, not shown on the engine block of the internal combustion engine out ⁇ half of the electronic control unit, and a short circuit of the leads to vehicle ground is a common mistake. However, this must not lead to damage to the electronics.
  • the Steue ⁇ executed for a bistable injection valve approximation unit of Figure 11 includes a monostable multivibrator IC2, a flip-flop ICLA, a comparator Compl and an AND gate having three inputs IC3A.
  • the closing signal ES is connected to the trigger ⁇ input CK of the monostable multivibrator IC2, with an input of the AND gate IC3A and to the reset input CLR of flip-flop non ICLA.
  • the tapped at the resistor R7 in Figure 10 signal NSS (Ne ⁇ negative current sense) is connected to the non-inverting input the comparator Compl whose inverting input a reference voltage Vref is supplied.
  • the output of the comparator Compl is connected to the trigger input CLK of the flip-flop IClA.
  • the output Q of the monoflop IC2 is connected to a second input of the AND gate whose third input is connected to the inverting Q-not output of the flip-flop IClA.
  • the signal NSC negative current control
  • a signal NSD negative current diagnosis
  • the control signal already described in Figure 6, the closing signal as Example ⁇ It controls also the switching on of the negative current to the opening coil Ll.
  • the negative current is switched off on reaching a vorgege- but now surrounded current value, but has to be the smaller than the target ⁇ value of the current of the current source T4-6.
  • the signal curves of the control unit shown in FIG. 11 can be taken from FIG.
  • the closing signal ES has low levels.
  • This level is also applied to the reset input CLR-not of the flip-flop IClA, so that at its non-inverting output Q a negative-current diagnostic signal NSD is present with a low level. Accordingly, the vertierende in ⁇ output Q-Not of the flip-flop Icla high level.
  • the rising edge of the control signal ES clocks the monoflop IC2 whose output Q now assumes high levels for the duration of the monoflop time.
  • the AND gate IC3A combines the signals ES, Q of IC2 and Q-not of IClA. Since all these signals now have high levels, the signal NSC at the output of AND gate IC3A decreases with the rising edge of the control signal. nals ES also high-level. The negative current starts to increase.
  • the output of the comparator Compl has low level. If the value of NSS exceeds that of Vref, the output of the comparator Compl jumps to high level and sets the downstream flip-flop IClA. Its inverting output Q-Not jumps to low level and switches via the AND gate IC3A, the signal NSC to low level, whereby the negative current in the opening coil Ll is turned off. Similarly, the signal NSD jumps to non-inverting output Q to high level.
  • Be ⁇ is a short circuit to reference potential with one of the lines to ⁇ the coil, no current will flow through resistor R7 and the signal NSD remains at low level. This also applies to a line break.
  • the time constant of the monostable IC2 is selected so that the desired value of the negative current is reliably achieved, but a thermal overload of the power transistor T4 of the current source in the event of a short circuit to the reference potential is avoided. If the signal NSS (negative current sense) has not exceeded the value of Vref until the time constant has elapsed, then the downstream flip-flop IClA is not triggered. The Sig nal ⁇ NSD the non-inverting output Q remains at a low level. The output Q of the monostable multivibrator IC2 goes back to the low level and disables the AND gate IC3A, so that its output signal ⁇ NSC to the low level goes.
  • the control unit of Figure 11 is supplemented to the effect that the opening signal EO, be ⁇ before it the monoflop IC2, the AND gate IC3A and the flip-flop IClA is fed, is inverted by means of an inverter IC4, so that the monoflop IC2 is triggered only by the falling Flan ⁇ ke of the signal EO.
  • the circuit arrangement of Figure 4 or Figure 10 for actuating a plurality of valves, ie, all (for example, four or six) fuel injectors a Internal combustion engine can be extended without having to increase the number of circuits proportionally. This is achieved by adding additional diodes D7 to DLO in series with the drain terminal of the third transistor T3, of additional diodes D4a to D6a and D4b to D6b in series with the source terminal of the transistor T4, and / or a white ⁇ n transistor T3b, and another current mirror T4b- T7b, R2b-R5b.
  • each of the desired Current path selected by suitable control of T3, T3b, T7, T7b se ⁇ .
  • Figure 14 shows a schematic representation of a standard solenoid injector with coil S4 and closing spring S3.
  • the coil S4 is surrounded by the iron yoke S5.
  • the valve needle S7 and its associated armature S6 is pressed by the closing spring S3 against a valve seat, not shown, and thus blocks the valve opening ⁇ not shown.
  • the armature S6 is attracted against the force of the closing spring S3 and thus the valve is opened.
  • FIG. 14 the solid field lines 14a (left) with the valve open and the dashed field lines 14b (right) in the closing process during the temporarily occurring field reversal are shown.
  • FIG. 15 shows, in principle, the formation of transient, opposite field directions between iron yoke S5 and armature S6.
  • the lower diagram shows the time course of the applied to the coil negative current pulse during the closing of the injector.
  • the upper diagram shows the field strengths or holding forces resulting from eddy currents.
  • the respective value of the eddy current is associated with a magnetic field strength and thus a holding force.
  • the upper curve 15 shows the course of the armature S6 - wel ⁇ cher consists of material having the highest possible electrical conductance - effective field strength, while the lower curve 15b the course of the iron yoke S5 - of material of low electrical conductivity - is effective field strength.

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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)
  • Magnetically Actuated Valves (AREA)

Abstract

La présente invention concerne un procédé et un dispositif permettant une commande accélérée de soupapes d'injection de carburant inductives. Selon l'invention, les forces magnétiques de retenue provoquées par la rémanence dans le cas d'une soupape bistable (avec bobine d'ouverture et de fermeture) ou par les courants de Foucault dans le cas d'une soupape standard avec bobine d'ouverture et ressort de fermeture, sont supprimées par un courant 'négatif' qui traverse la bobine dans un sens opposé au sens de circulation du courant de fonctionnement. Pour assurer une fermeture encore plus rapide de la soupape, on utilise en supplément une extrémité en fer et un induit constitués de matériaux ayant des valeurs de conductivité électrique différentes.
EP07704077A 2006-01-24 2007-01-23 Dispositif pour commander des soupapes d'injection de carburant inductives Expired - Fee Related EP1979598B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006003388 2006-01-24
DE200610025360 DE102006025360B3 (de) 2006-05-31 2006-05-31 Vorrichtung zum Schalten induktiver Kraftstoff-Einspritzventile
PCT/EP2007/050643 WO2007085591A1 (fr) 2006-01-24 2007-01-23 Dispositif pour commander des soupapes d'injection de carburant inductives

Publications (2)

Publication Number Publication Date
EP1979598A1 true EP1979598A1 (fr) 2008-10-15
EP1979598B1 EP1979598B1 (fr) 2011-03-23

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EP07704077A Expired - Fee Related EP1979598B1 (fr) 2006-01-24 2007-01-23 Dispositif pour commander des soupapes d'injection de carburant inductives

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US (1) US7832378B2 (fr)
EP (1) EP1979598B1 (fr)
DE (1) DE502007006767D1 (fr)
WO (1) WO2007085591A1 (fr)

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KR101252094B1 (ko) 2011-01-11 2013-04-12 호남대학교 산학협력단 솔레노이드 구동 제어기
JP2013021454A (ja) * 2011-07-08 2013-01-31 Sony Corp 撮像装置及び固体撮像装置の保護装置
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Also Published As

Publication number Publication date
US7832378B2 (en) 2010-11-16
WO2007085591A1 (fr) 2007-08-02
EP1979598B1 (fr) 2011-03-23
DE502007006767D1 (de) 2011-05-05
US20090126692A1 (en) 2009-05-21

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