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WO2013077011A1 - Dispositif d'allumage du type à décharge à chevauchement pour moteur à combustion interne - Google Patents

Dispositif d'allumage du type à décharge à chevauchement pour moteur à combustion interne Download PDF

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Publication number
WO2013077011A1
WO2013077011A1 PCT/JP2012/062880 JP2012062880W WO2013077011A1 WO 2013077011 A1 WO2013077011 A1 WO 2013077011A1 JP 2012062880 W JP2012062880 W JP 2012062880W WO 2013077011 A1 WO2013077011 A1 WO 2013077011A1
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WO
WIPO (PCT)
Prior art keywords
voltage
output
superimposed
discharge
control means
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/JP2012/062880
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English (en)
Japanese (ja)
Inventor
島田　直樹
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Hitachi Astemo Hanshin Ltd
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Hitachi Automotive Systems Hanshin Ltd
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Publication date
Priority claimed from JP2011257296A external-priority patent/JP6041084B2/ja
Priority claimed from JP2012011702A external-priority patent/JP6041085B2/ja
Application filed by Hitachi Automotive Systems Hanshin Ltd filed Critical Hitachi Automotive Systems Hanshin Ltd
Publication of WO2013077011A1 publication Critical patent/WO2013077011A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • F02P3/0407—Opening or closing the primary coil circuit with electronic switching means
    • F02P3/0435—Opening or closing the primary coil circuit with electronic switching means with semiconductor devices
    • F02P3/0442—Opening or closing the primary coil circuit with electronic switching means with semiconductor devices using digital techniques
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • F02P3/05—Layout of circuits for control of the magnitude of the current in the ignition coil
    • F02P3/051—Opening or closing the primary coil circuit with semiconductor devices
    • F02P3/053—Opening or closing the primary coil circuit with semiconductor devices using digital techniques
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P9/00—Electric spark ignition control, not otherwise provided for
    • F02P9/002—Control of spark intensity, intensifying, lengthening, suppression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P9/00—Electric spark ignition control, not otherwise provided for
    • F02P9/002—Control of spark intensity, intensifying, lengthening, suppression
    • F02P9/007—Control of spark intensity, intensifying, lengthening, suppression by supplementary electrical discharge in the pre-ionised electrode interspace of the sparking plug, e.g. plasma jet ignition
    • 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
    • F02D2041/2003—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
    • F02D2041/2013—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening by using a boost voltage source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2058—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using information of the actual current value

Definitions

  • the present invention relates to an improvement of an ignition device for an internal combustion engine mounted on a motor vehicle, particularly an ignition device for a multi-discharge internal combustion engine.
  • the high voltage output of the DC-DC converter is superimposed on the secondary output of the ignition coil to superimpose the high voltage output of the DC-DC converter. It is necessary to select high voltage components for the transformer and the charge / discharge capacitor, and it is difficult to reduce the size of the DC-DC converter. For this reason, the DC-DC converter cannot be installed around the ignition coil, and the overlapping discharge function unit including the DC-DC converter must be installed at a site away from the ignition coil. In order to lead out the high voltage output to the ignition coil 2, high withstand voltage wiring is required. Therefore, the conventional ignition device for a multi-discharge internal combustion engine has problems in terms of cost and storage space.
  • the overlap time and overlap current are determined by the capacity of the charge / discharge capacitor. It is difficult to arbitrarily change the current.
  • the conventional overlap discharge type internal combustion engine ignition device retains the design overlap time and overlap current, and as a result, excessive discharge energy is supplied and unnecessary power consumption continues or ignition occurs. There is also a problem that the consumption of the plug electrode is accelerated.
  • the present invention can reduce the size of the apparatus at low cost, can be installed in a small in-vehicle space, can be diverted to a structure capable of controlling discharge time and discharge energy suitable for an internal combustion engine, and can stably discharge. It is an object of the present invention to provide an ignition device for a multi-discharge internal combustion engine that can maintain a supply of a super-multiple current necessary and sufficient.
  • the invention according to claim 1 is configured to block the current of the primary coil of the ignition coil in response to the ignition signal, induce a high voltage in the secondary coil, and have the same polarity as the high voltage.
  • an ignition device for a multi-discharge internal combustion engine that superimposes a voltage, causes a spark discharge in a discharge gap of an ignition plug, and ignites an air-fuel mixture in a combustion chamber, at the timing of high voltage induction of a secondary coil based on the ignition signal
  • a superimposed voltage generating operation control means for outputting a superimposed voltage generating alternating current of a required voltage / required frequency, and a voltage doubler rectifier circuit operating within a cycle of the superimposed voltage generating alternating current supplied from the superimposed voltage generating operation control means.
  • a multi-stage voltage doubler rectifier that combines multiple stages and outputs a DC high voltage that is several times the peak value of the input peak value, and outputs the DC high voltage output from the multi-stage voltage doubler rectifier.
  • the invention according to claim 2 interrupts the current of the primary coil of the ignition coil in response to the ignition signal, induces a high voltage in the secondary coil, and superimposes a voltage having the same polarity as the high voltage
  • an ignition device for a multi-discharge internal combustion engine that generates a spark discharge in a discharge gap of a plug and ignites an air-fuel mixture in a combustion chamber
  • the superimposed voltage generation AC and the superimposed voltage generation operation control means capable of increasing / decreasing the output power based on an external instruction, and the superimposed voltage generation AC supplied from the superimposed voltage generation operation control means.
  • a multi-stage voltage doubler rectifier that combines multiple voltage rectifier circuits operating in a cycle and outputs a DC high voltage that is multiple times the number of input voltages; and from the multi-stage voltage doubler rectifier
  • the DC high voltage to be applied is superposed with the same polarity as the high voltage induced in the secondary coil of the ignition coil, applied to the ignition plug to cause overlap discharge, and superposed by the multistage voltage doubler rectifier
  • While detecting the overlap current value it compares the preset overlap current set value with the actually detected overlap current detection value, and if the overlap current detection value is lower than the overlap current set value, the output increase instruction signal Is provided to the superimposed voltage generation operation control means, and when the overlap current detection value is higher than the overlap current set value, feedback control means is provided for outputting an output reduction instruction signal to the overlap voltage generation operation control means, and the feedback Adjusting the power output from the superimposed voltage generation operation control means to the multi-stage voltage doubler rectification means based on an output increase instruction signal or output reduction instruction signal from the control
  • the superimposed voltage generation operation control means receives an output increase instruction signal or an output reduction instruction signal from the feedback control means. The output is increased / decreased by a predetermined amount each time the signal is received.
  • the feedback control means increases or decreases the output according to the difference between the superposed current detection value and the superposed current set value.
  • an output increase instruction signal or an output decrease instruction signal including the determined output increase / decrease amount is transmitted to the superimposed voltage generation operation control means, and the superimposed voltage generation operation control means increases the output from the feedback control means.
  • the output power is increased or decreased according to the instruction signal or the output reduction instruction signal.
  • the superimposed voltage generation operation control means generates the superimposed voltage to be generated.
  • the power output to the multi-stage voltage doubler rectifying means is adjusted by changing the peak value of the AC for use.
  • the invention according to claim 6 is the ignition device for an overlap discharge type internal combustion engine according to any one of claims 2 to 4, wherein the superimposed voltage generation operation control means is a rectangular wave AC ON.
  • the power output to the multistage voltage doubler rectifier is adjusted by PWM control that changes the / OFF duty ratio.
  • PWM control that changes the / OFF duty ratio.
  • in the ignition apparatus for a supercharging internal combustion engine according to the first aspect by changing the voltage value of the superimposed voltage generating AC output from the superimposed voltage generating operation control means.
  • the voltage output from the multi-stage voltage doubler rectifier can be adjusted.
  • the invention according to claim 8 is the overlap time control means capable of arbitrarily controlling the drive time of the overlap voltage generation operation control means in the ignition device for the overlap discharge type internal combustion engine according to claim 1 or claim 7.
  • the superposition time of the DC high voltage generated by the multi-stage voltage doubler rectifier can be arbitrarily changed.
  • the invention according to claim 9 is the ignition device for a multiple discharge type internal combustion engine according to claim 1 or 7, wherein the multistage voltage doubler rectifier is housed in the same case as the ignition coil. It is characterized by doing so.
  • the superimposed voltage generating operation control means for outputting the superimposed voltage generating alternating current of the required voltage / required frequency at the timing of the high voltage induction of the secondary coil based on the ignition signal, and the superimposing Multi-stage voltage doubler that combines multiple voltage rectifier circuits that operate within the period of the superimposed voltage generation AC supplied from the voltage generation operation control means, and outputs a DC high voltage that is the number of stages of the input peak value.
  • the withstand voltage of the diode and capacitor used in each voltage doubler rectifier circuit constituting the multistage voltage doubler rectifier is sufficient to be about twice that of the superimposed voltage generating AC output. Because it is not necessary that a large capacity such as charging and discharging capacitor of a conventional lap discharge type ignition device for an internal combustion engine, enables miniaturization of cost containment and components, it can be installed to reasonably narrow automotive space.
  • the superimposed voltage generating alternating current of the required voltage / required frequency is output and output based on an instruction from the outside.
  • Superimposed voltage generation operation control means that can increase or decrease the power to be combined with a double voltage rectifier circuit that operates within the cycle of the superimposed voltage generation AC supplied from the superimposed voltage generation operation control means in multiple stages, and the number of input voltage stages And a multi-stage voltage doubler rectifier that outputs a double DC high voltage, and the DC high voltage output from the multi-stage voltage doubler rectifier is the same as the high voltage induced in the secondary coil of the ignition coil.
  • Overlap with polarity and apply to the spark plug to cause overlap discharge detect the overlap current value superimposed by the multistage voltage doubler rectifier, and When the overlap current detection value is lower than the overlap current set value, an output increase instruction signal is output to the superimposed voltage generation operation control means, and the overlap current detection value is overlapped.
  • feedback control means for outputting an output reduction instruction signal to the superimposed voltage generation operation control means when higher than the current set value, based on the output increase instruction signal or the output reduction instruction signal from the feedback control means, Feedback to increase or decrease the DC high voltage output from the multi-stage voltage doubler rectifier by adjusting the power output from the superposed voltage generation operation control means to the multi-stage voltage doubler rectifier, thereby bringing the overlap current detection value closer to the overlap current set value Since the control is performed, the withstand voltages of the diodes and capacitors used in each voltage doubler rectifier circuit constituting the multistage voltage doubler rectifier are superimposed voltage.
  • the feedback control by the feedback control means can increase or decrease the DC high voltage that is actually superimposed, and maintain the supply of sufficient overlap current necessary for stable discharge.
  • the superimposed voltage generation operation control means increases or decreases the output by a predetermined specified amount every time an output increase instruction signal or an output reduction instruction signal is received from the feedback control means. Since it did in this way, a feedback control means can be comprised comparatively easily.
  • the feedback control means determines the output increase / decrease amount according to the difference between the overlap current detection value and the overlap current set value, and the output increase includes the determined output increase / decrease amount.
  • An instruction signal or an output reduction instruction signal is transmitted to the superimposed voltage generation operation control means, and the superimposed voltage generation operation control means outputs power to be output in response to the output increase instruction signal or the output reduction instruction signal from the feedback control means. Since it is increased or decreased, it is possible to quickly cope with a sudden change in the detected overlap current value.
  • the superimposed voltage generation operation control means adjusts the power output to the multistage voltage doubler rectifier means by changing the peak value of the generated superimposed voltage generating alternating current.
  • the superimposed voltage generation operation control means adjusts the power output to the multistage voltage doubler rectification means by PWM control that changes the ON / OFF duty ratio of the rectangular wave AC. Therefore, it is possible to cope with output reduction or mainstream direct increase using a rectangular wave alternating current with a predetermined peak value.
  • the voltage output from the multi-stage voltage doubler rectifier can be adjusted by changing the voltage value of the superimposed voltage generating AC output from the superimposed voltage generating operation control unit. Since it did in this way, the discharge current which can perform the discharge of the characteristic suitable for the state of air-fuel mixture can be sent.
  • the superposition time control means capable of arbitrarily controlling the drive time of the superposition voltage generation operation control means is provided, and the superposition time of the DC high voltage generated by the multistage voltage doubler rectification means. Since the discharge current can be arbitrarily changed, the discharge current can be continued for an overlap time that allows discharge having characteristics suitable for the state of the air-fuel mixture.
  • the overlap time and the overlap current can be arbitrarily changed, the optimum discharge time and the optimum discharge energy are supplied to the mixture state. In addition, it is possible to avoid problems such as wasteful power consumption due to excessive discharge energy being supplied and rapid consumption of the spark plug electrode.
  • the multistage voltage doubler rectifier since the multistage voltage doubler rectifier is housed in the same case as the ignition coil, a high voltage supply line from the multistage voltage doubler rectifier to the ignition coil. Can be accommodated in the case, and it is not necessary to route the DC high-voltage line, and it is not necessary to secure a high-breakdown-voltage wiring material and wiring space.
  • FIG. 1 is a schematic configuration diagram of an ignition device for a multi-discharge internal combustion engine shown as an embodiment of the present invention.
  • FIG. 2 is an operation waveform diagram at the time of ignition in the ignition device for the multiple discharge internal combustion engine of FIG.
  • FIG. 1 shows a schematic configuration of an embodiment in which an ignition device for a multiple discharge type internal combustion engine according to the present invention is applied to an engine ignition device for a vehicle.
  • An ignition coil 1 (for example, a primary coil 1a, a secondary coil 1b) is shown.
  • the iron core 1c and the switching element 1d) cause a spark discharge in the discharge gap g of the spark plug 2, and ignites the air-fuel mixture in the combustion chamber of the vehicle engine (not shown).
  • the switching element 1d of the ignition coil 1 is turned on by an ignition signal from the engine control unit (ECU), a current flows to the primary coil 1a to which the DC voltage VB is supplied from a vehicle battery (not shown).
  • ECU engine control unit
  • the switching element 1d is turned off at the falling edge of the ignition signal, the current of the primary coil 1a is cut off, and a spark discharge is caused in the gap g between the discharges of the spark plug 2 by the high voltage induced in the secondary coil 1b. . Therefore, in the ignition apparatus for a multi-discharge internal combustion engine according to this embodiment, in order to generate a voltage to be superimposed on the high voltage induced in the secondary coil 1b, the “high voltage of the secondary coil based on the ignition signal” is generated.
  • DC-AC booster circuit 3 serving as a superimposed voltage generation operation control means that outputs alternating current for generating a superimposed voltage having a required voltage / required frequency at the induction timing and that can increase or decrease the output power based on an external instruction.
  • the superposition voltage generation AC for example, AC200V
  • the multi-stage voltage doubler rectifier circuit 4 serving as a “multi-stage voltage doubler rectifier that outputs a DC high voltage” is supplied to the multi-stage voltage doubler rectifier circuit 4 and the DC high voltage (for example, DC1.2 V) is output, by superimposing the DC high voltage to the induced voltage of the secondary coil 1b, is to adjust the size and the discharge time of the discharge current that causes the ignition plug 2.
  • a high voltage diode 5 is provided between the secondary coil 1b and the ground point so that the secondary coil 1b side is an anode and the ground side is a cathode, and the DC high voltage output from the multistage voltage doubler rectifier circuit 4 is provided.
  • the high voltage induced in the secondary coil 1 b is superimposed with the same polarity.
  • the DC-AC booster circuit 3 starts operating at the timing when the switching element 1d of the ignition coil 1 is turned off by the ignition signal (for example, the detection timing of the pulse falling of the ignition signal), and after a predetermined overlap time has elapsed, although the operation may be stopped by, for example, “the overlap time control means that can arbitrarily control the drive time of the overlap voltage generation operation control means so that the overlap time according to the combustion characteristics of the internal combustion engine can be easily adjusted.
  • the superposition time control circuit 6 is provided, and the superposition time (time for outputting the superposition voltage generation AC from the DC-AC booster circuit 3) can be arbitrarily changed by setting the superposition time control circuit 6. I made it.
  • a current detection resistor 7 is provided at an appropriate discharge path of the spark plug 2 (for example, between the high voltage diode 5 and the grounding point) so that the actually flowing discharge current can be detected by the overlapping current detection / comparison circuit 8.
  • This overlap current detection / comparison circuit 8 can store the overlap current setting value based on the overlap current setting signal input from the outside, and “detects the overlap current value superimposed by the multi-stage voltage doubler rectifier. At the same time, the preset overlap current setting value is compared with the actually detected overlap current detection value. When the overlap current detection value is lower than the overlap current set value, the output increase instruction signal is generated.
  • the overlap current detection value When the overlap current detection value is higher than the overlap current set value, it functions as feedback control means for outputting an output reduction instruction signal to the superimposed voltage generation operation control means ”. That is, based on the output increase instruction signal or the output decrease instruction signal from the overlap current detection / comparison circuit 8, the power (the peak value of the superimposed voltage generation AC) output from the DC-AC booster circuit 3 to the multistage voltage doubler rectifier circuit 4.
  • the discharge current detected by the overlap current detection / comparison circuit 8 includes a spike-like discharge current based on a high voltage induced in the secondary coil 1b. For example, a predetermined time has elapsed from the detection timing of the discharge current. A current value detected later may be taken in as an overlap current detection value and used for comparison with the overlap current set value.
  • the overlap time control signal output from the overlap time control circuit 6 to the DC-AC booster circuit 3 is turned ON at the timing when the secondary voltage is induced in the secondary coil 1b (timing of the pulse fall of the ignition signal). (For example, the signal level is changed from L to H), and output of the superimposed voltage generation AC by the DC-AC booster circuit 3 is started.
  • the DC-AC booster circuit 3 continues to output the superimposed voltage generation AC until the overlap time control signal from the overlap time control circuit 6 is turned off (the signal level changes from H to L).
  • a high DC voltage is output from the voltage doubler rectifier circuit 4.
  • the DC-AC booster circuit 3 is exemplified by a DC voltage VB (for example, DC12V) of the on-vehicle battery that is output with an AC voltage of 200V.
  • a DC voltage VB for example, DC12V
  • the multistage voltage doubler rectifier circuit 4 that receives the superimposed voltage generating alternating current from the DC-AC booster circuit 3 configured as described above is a voltage doubler rectifier circuit that outputs a direct current voltage that is twice the peak value of the input alternating current.
  • a DC high voltage of 1.2 kV DC which is 6 times higher than the AC 200 V input, can be obtained.
  • the voltage doubler rectifier circuit used for the multistage voltage doubler rectifier circuit 4 may be a known one.
  • the capacitor C1 is charged by the diode D1
  • the capacitor C2 is charged by the diode D2.
  • the capacitor C3, the capacitor C4, the capacitor C5, and the capacitor C6 by the diode D3, the diode D4, the diode D5, and the diode D6, the capacitor C2, the capacitor C4, and the capacitor C6 connected in series are Since each is charged to approximately twice the input peak value, a direct current of 6 times the voltage (capacitor charging voltage ⁇ 2 ⁇ number of stages) can be obtained.
  • the withstand voltages of the diodes D1 to D6 and the capacitors C1 to C6 of each voltage doubler rectifier circuit are all for generating a superimposed voltage. Since there is no problem if it is twice or more the AC voltage value, there is no need for a large capacity like the charge / discharge capacitor of the conventional ignition device for a multi-discharge internal combustion engine, and it is possible to reduce the size and cost of parts.
  • the multistage voltage doubler rectifier circuit 4 is not limited to three stages, and may be two stages or four stages or more.
  • the DC high voltage of 1.2 kV obtained from the multistage voltage doubler rectifier circuit 4 as described above continues until the overlap time control signal of the overlap time control circuit 6 is turned off (the signal level changes from H to L). Is output.
  • the DC high voltage obtained from the multi-stage voltage doubler rectifier circuit 4 is superimposed on the high voltage induced in the secondary coil 1b, it must be superimposed with the same polarity as the high voltage induced in the secondary coil 1b. Therefore, the superimposed voltage on the discharge electrode becomes an inverted waveform of the output of the multistage voltage doubler rectifier circuit.
  • the DC high voltage output from the multistage voltage doubler rectifier circuit 4 is the same as the high voltage induced in the secondary coil 1b of the ignition coil 1.
  • the discharge waveform of the spark plug 2 is superimposed with the DC high voltage from the multi-stage voltage doubler rectifier circuit 4 even after a large current at the beginning of ignition flows, as shown in FIG.
  • the discharge of the spark plug 2 continues until the overlap time controlled by the overlap time control circuit 6 elapses, and the overlap current equal to the overlap current set value continues to flow.
  • the DC-AC booster circuit 3 that outputs the superimposed voltage generating alternating current
  • the multistage that receives the superimposed voltage generating alternating current and generates a direct high voltage. Since the voltage doubler rectifier circuit 4 is used, the voltage value of the superimposed voltage generation AC output from the DC-AC booster circuit 3 serving as the superimposed voltage generation operation control means is increased or decreased.
  • the voltage output from the multi-stage voltage doubler rectifier circuit 4 as the multi-stage voltage doubler rectifier can be adjusted to be higher or lower, so that a discharge current capable of discharging with characteristics suitable for the state of the air-fuel mixture can flow. it can.
  • the driving time of the DC-AC booster circuit 3 as the superimposed voltage generation operation control means can be arbitrarily controlled by the overlap time control circuit 6 as the overlap time control means, the direct current generated by the multi-stage voltage doubler rectifier circuit 4 can be controlled.
  • the stacking time of the high voltage can be lengthened, shortened, or arbitrarily changed, and the discharge current can be continued for a stacking time that allows discharge having characteristics suitable for the state of the air-fuel mixture.
  • the discharge energy adjustment function by the DC-AC booster circuit 3 and the overlap time adjustment function by the overlap time control circuit 6 are used together, the discharge energy superimposed on the overlap time can be arbitrarily changed.
  • the multistage voltage doubler rectifier circuit 4 can be configured with small components, it can be easily housed in the same case as the ignition coil 1.
  • the multistage voltage doubler rectifier circuit 4 and the high voltage diode 5 are housed in the same case as the ignition coil 1, the high voltage supply line from the multistage voltage doubler rectifier circuit 4 can be housed in the case, and the direct current There is no need to route a high voltage line, and it is not necessary to secure a wiring material or wiring space with a high breakdown voltage.
  • an AC 200 V superimposed voltage generating alternating current is supplied from the DC-AC booster circuit 3 to the multistage voltage doubler rectifier circuit 4 and output from the multistage voltage doubler rectifier circuit 4.
  • the overlap current detection / comparison circuit 8 As a result of the overlap current detection / comparison circuit comparing the overlap current detection value and the overlap current setting value, the absolute value of the overlap current detection value is larger than the absolute value of the overlap current setting value. If it is smaller, the overlap current detection / comparison circuit 8 outputs an output increase instruction signal to the DC-AC booster circuit 3, and the DC-AC booster circuit 3 that has received this signal outputs a predetermined specified amount (for example, 1 V).
  • the peak value of the superimposed voltage generating AC is increased, the output voltage of the multi-stage voltage doubler rectifier circuit 4 is increased (for example, increased by about 6 V, which is 6 times the added voltage), and the superimposed voltage on the discharge electrode is increased and superimposed. Increase current.
  • the overlap current detection / comparison circuit 8 detects and compares the increased overlap current, and if the overlap current detection value is still less than the overlap current set value, the overlap current detection / comparison circuit 8 outputs an output increase instruction signal. Output to the DC-AC booster circuit 3 to further slightly increase the peak value of the superimposed voltage generating AC. If the overlap current detection value and the overlap current setting value match, the overlap increase detection / comparison circuit 8 does not output an output increase instruction signal to the DC-AC booster circuit 3. Since the output peak value of the superimposed voltage generating AC is maintained as it is, the superimposed voltage from the multistage voltage doubler rectifier circuit 4 to the discharge electrode is also maintained as it is, and the overlap current that matches the overlap current set value is maintained.
  • the overlap current detection / comparison circuit compares the overlap current detection value with the overlap current setting value and the absolute value of the overlap current detection value is greater than the absolute value of the overlap current setting value
  • the overlap current detection / comparison The circuit 8 outputs an output reduction instruction signal to the DC-AC booster circuit 3, and the DC-AC booster circuit 3 that has received this signal outputs the peak value of the superimposed voltage generating AC by a predetermined amount (for example, 1 V).
  • the output voltage of the multistage voltage doubler rectifier circuit 4 is reduced (for example, reduced by about 6 V, which is six times the added voltage), and the superimposed voltage on the discharge electrode is lowered to reduce the superimposed current.
  • the overlap current detection / comparison circuit 8 detects and compares the reduced overlap current, and if the overlap current detection value still exceeds the overlap current set value, the overlap current detection / comparison circuit 8 instructs the output reduction.
  • the signal is output to the DC-AC booster circuit 3 to further reduce the peak value of the superimposed voltage generating AC. If the overlap current detection value matches the overlap current setting value, the overlap reduction detection / comparison circuit 8 does not output an output reduction instruction signal to the DC-AC booster circuit 3, and therefore the DC-AC booster circuit 3 Since the output peak value of the superimposed voltage generating AC is maintained as it is, the superimposed voltage from the multistage voltage doubler rectifier circuit 4 to the discharge electrode is also maintained as it is, and the overlap current that matches the overlap current set value is maintained.
  • the overlap current set value which is the reference for feedback control by the overlap current detection / comparison circuit 8
  • the overlap current set value can be arbitrarily set by inputting an overlap current setting signal from the outside. Since the optimum overlap current value can be set according to the characteristics of the engine to which the device is applied, the versatility of the device can be enhanced.
  • the feedback control realized by the superimposed current detection / comparison circuit 8 and the DC-AC booster circuit 3 is not limited to the above-described method, and a known existing method may be appropriately used. For example, a correspondence table or an arithmetic expression in which the difference between the overlap current set value and the overlap current detection value and the output increase / decrease value instructed to the DC-AC booster circuit 3 to fill this difference is associated with the overlap current detection / comparison.
  • a signal (an output increase instruction signal or an output decrease instruction signal) including an output increase / decrease amount determined from the correspondence table or the arithmetic expression is stored in the circuit 8 from the overlap current detection / comparison circuit 8 to the DC-AC booster circuit 3.
  • the DC-AC booster circuit 3 that receives this signal changes the peak value of the superimposed voltage generating AC based on the instruction information, and increases or decreases the charging voltage from the multistage voltage doubler rectifier circuit 4 to the discharge electrode at once.
  • the overlap current may be brought close to the set value quickly. Further, in the above-described embodiment of the ignition device for the multi-discharge internal combustion engine, the power supplied to the multistage voltage doubler rectifier circuit 4 by changing the peak value of the superimposed voltage generating AC supplied from the DC-AC booster circuit 3.
  • the charging voltage of each of the capacitors C1 to C6 of the multistage voltage doubler rectifier circuit 4 is increased or decreased to increase or decrease the superimposed voltage on the discharge electrode, but the method of increasing or decreasing the charging voltage to the discharge electrode is as follows: It is not limited to this.
  • PWM control means 3a (configured by a chopper circuit or an inverter circuit) in the DC-AC booster circuit 3 and changing the ON / OFF duty ratio of the rectangular wave as the superimposed voltage generating AC, a multi-stage The power supplied to the voltage doubler rectifier circuit 4 may be changed.
  • the PWM control means 3a When the ON duty time of the superimposed voltage generating alternating current (rectangular wave) is changed by the PWM control means 3a, although the peak value of the rectangular wave input to the multistage voltage doubler rectifier circuit 4 does not change, it depends on the ON / OFF duty ratio. Since the charging voltage of each of the capacitors C1 to C6 increases or decreases, the DC voltage obtained from the multistage voltage doubler rectifier circuit 4 can be adjusted.
  • the PWM control means 3a may not be included as one function of the DC-AC booster circuit 3, but may be provided as an independent chopper circuit or the like on the output side of the DC-AC booster circuit 3.
  • an increase / decrease instruction from the overlap current detection / comparison circuit 8 is supplied to the PWM control means 3a, and the PWM control means 3a generates a predetermined peak value generated by the DC-AC booster circuit 3 based on this instruction.
  • the PWM control means 3a By performing control to change the ON / OFF duty ratio with respect to the rectangular wave (for example, 200 V), the superimposed voltage generation AC is output from the PWM control unit 3a.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

L'invention porte sur un dispositif d'allumage du type à décharge pour un moteur à combustion interne avec lequel il est possible d'obtenir un faible coût et une dimension réduite, et qui peut être monté dans un étroit espace de montage et avec lequel il est possible de maintenir le courant de chevauchement qui est nécessaire pour une décharge stable. Un dispositif d'allumage pour un moteur à combustion interne avec lequel une décharge disruptive est produite dans l'éclateur (g) d'une bougie d'allumage (2) et un courant de décharge circule grâce à une bobine d'allumage (1) qui est activée sur la base d'un signal d'allumage, est équipé d'une fonction de décharge à chevauchement. La configuration est telle qu'un circuit de commande du temps de chevauchement (6) fait fonctionner un circuit renforçateur continu-alternatif (3) et un courant alternatif servant à produire une tension à chevauchement est acheminé à un circuit redresseur doubleur de tension multi-étage (4), et la haute tension en courant continu obtenue est à chevauchement avec la même polarité avec la tension d'induction d'une bobine secondaire (1b). La tension de charge arrivant à une électrode de décharge est détectée par un circuit de détection/comparaison de courant à chevauchement (8) et comparée à une valeur réglée du courant à chevauchement. Si la valeur détectée pour le courant à chevauchement est inférieure à la valeur réglée, la valeur pour la hauteur d'onde du courant alternatif issue du circuit renforçateur continu-alternatif (3) servant à produire la tension à chevauchement est élevée et, si la valeur détectée est plus élevée que la valeur réglée, la valeur pour la hauteur d'onde du courant alternatif issue du circuit renforçateur continu-alternatif (3) servant à produire la tension de charge est abaissée, rapprochant ainsi la valeur détectée pour le courant à chevauchement de la valeur réglée.
PCT/JP2012/062880 2011-11-25 2012-05-14 Dispositif d'allumage du type à décharge à chevauchement pour moteur à combustion interne Ceased WO2013077011A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2011-257296 2011-11-25
JP2011257296A JP6041084B2 (ja) 2011-11-25 2011-11-25 重ね放電型内燃機関用点火装置
JP2012-011702 2012-01-24
JP2012011702A JP6041085B2 (ja) 2012-01-24 2012-01-24 重ね放電型内燃機関用点火装置

Publications (1)

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WO2013077011A1 true WO2013077011A1 (fr) 2013-05-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015071044A1 (fr) * 2013-11-14 2015-05-21 Robert Bosch Gmbh Système d'allumage et procédé pour faire fonctionner un système d'allumage
JP2015200270A (ja) * 2014-04-10 2015-11-12 株式会社デンソー 点火装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5397564A (en) * 1977-02-05 1978-08-25 Hanshin Henatsuki Seisakushiyo Multiple discharge high energy igniter
JPS56110566A (en) * 1980-02-07 1981-09-01 Seita Omori Dynamic current type ignition device
JPH05164028A (ja) * 1991-12-13 1993-06-29 Hanshin Electric Co Ltd 内燃機関用の重ね放電式点火装置
JPH07174063A (ja) * 1993-12-20 1995-07-11 Hanshin Electric Co Ltd 重ね放電型点火装置
JPH07229461A (ja) * 1994-02-18 1995-08-29 Hanshin Electric Co Ltd 内燃機関の重ね放電型点火装置
JP2006063973A (ja) * 2004-07-30 2006-03-09 Denso Corp エンジン点火装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5397564A (en) * 1977-02-05 1978-08-25 Hanshin Henatsuki Seisakushiyo Multiple discharge high energy igniter
JPS56110566A (en) * 1980-02-07 1981-09-01 Seita Omori Dynamic current type ignition device
JPH05164028A (ja) * 1991-12-13 1993-06-29 Hanshin Electric Co Ltd 内燃機関用の重ね放電式点火装置
JPH07174063A (ja) * 1993-12-20 1995-07-11 Hanshin Electric Co Ltd 重ね放電型点火装置
JPH07229461A (ja) * 1994-02-18 1995-08-29 Hanshin Electric Co Ltd 内燃機関の重ね放電型点火装置
JP2006063973A (ja) * 2004-07-30 2006-03-09 Denso Corp エンジン点火装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015071044A1 (fr) * 2013-11-14 2015-05-21 Robert Bosch Gmbh Système d'allumage et procédé pour faire fonctionner un système d'allumage
CN105705775A (zh) * 2013-11-14 2016-06-22 罗伯特·博世有限公司 点火系统和用于运行点火系统的方法
US9874194B2 (en) 2013-11-14 2018-01-23 Robert Bosch Gmbh Ignition system and method for operating an ignition system
CN105705775B (zh) * 2013-11-14 2018-04-24 罗伯特·博世有限公司 点火系统和用于运行点火系统的方法
JP2015200270A (ja) * 2014-04-10 2015-11-12 株式会社デンソー 点火装置

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