EP2330606A1 - Procédé de production et d'application d'une impulsion de tension nettoyante sur un raccordement d'arrêt, ainsi qu'agencement de circuit d'allumage magnétique numérique correspondant - Google Patents

Procédé de production et d'application d'une impulsion de tension nettoyante sur un raccordement d'arrêt, ainsi qu'agencement de circuit d'allumage magnétique numérique correspondant Download PDF

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Publication number
EP2330606A1
EP2330606A1 EP09177619A EP09177619A EP2330606A1 EP 2330606 A1 EP2330606 A1 EP 2330606A1 EP 09177619 A EP09177619 A EP 09177619A EP 09177619 A EP09177619 A EP 09177619A EP 2330606 A1 EP2330606 A1 EP 2330606A1
Authority
EP
European Patent Office
Prior art keywords
voltage
stop
connection
circuit arrangement
stop connection
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.)
Withdrawn
Application number
EP09177619A
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German (de)
English (en)
Inventor
Holger Dauster
Leo Kiessling
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.)
Pruefrex Engineering e Motion GmbH and Co KG
Original Assignee
Pruefrex Engineering e Motion GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pruefrex Engineering e Motion GmbH and Co KG filed Critical Pruefrex Engineering e Motion GmbH and Co KG
Priority to EP09177619A priority Critical patent/EP2330606A1/fr
Priority to US12/956,286 priority patent/US8689756B2/en
Publication of EP2330606A1 publication Critical patent/EP2330606A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/60—Auxiliary means structurally associated with the switch for cleaning or lubricating contact-making surfaces
    • H01H1/605—Cleaning of contact-making surfaces by relatively high voltage pulses
    • 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
    • F02P11/00—Safety means for electric spark ignition, not otherwise provided for
    • F02P11/02—Preventing damage to engines or engine-driven gearing
    • F02P11/025—Shortening the ignition when the engine is stopped
    • 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
    • F02P3/06—Other installations having capacitive energy storage
    • F02P3/08—Layout of circuits
    • F02P3/0807—Closing the discharge circuit of the storage capacitor with electronic switching means

Definitions

  • the invention relates to a method for generating and applying at least one voltage pulse having a cleaning function for a stop switch to a stop connection assigned to the stop switch, which is provided on a digitally controlled magneto ignition circuit of an electrical device, wherein the magneto ignition circuit arrangement measures a voltage waveform from over time their amplitude decreasing half-waves and / or generates at least one voltage pulse in a medium voltage range.
  • the invention further relates to a digitally controlled magnetic ignition arrangement of an electrical device having a stop connection associated with a stop switch, wherein the magnetic ignition device is designed to generate and apply at least one cleaning effect for the stop switch having the voltage pulse to the stop terminal and wherein the magnetic ignition circuit arrangement is designed to generate a voltage wave train of half-waves decreasing with respect to its amplitude over time and / or generating at least one voltage pulse in a medium voltage range
  • stop switches are used, in which contacts or contact surfaces are provided, where there is the problem that it can lead to contamination.
  • oxide layers can form on the switch contacts. Therefore, it is useful if the switch contacts or contact surfaces are cleaned regularly or from time to time by at least the thin oxide layers are removed, so as to ensure the correct operation of the stop switch. For many other soiling is unfortunately so far not possible, for example by burnishing.
  • the contact surfaces are cleaned by high voltage pulses at the two buttons.
  • the high voltage pulses are a byproduct of a high voltage stop.
  • the charging coil of an ignition circuit of the electrical device is shorted. This prevents that a likewise provided in the ignition circuit ignition capacitor can charge. It is not possible to create a spark.
  • a very high pulsed voltage is on the stop terminal. Touching the stop contact may result in an electric shock. This in turn has the consequence that the stop circuit must be isolated in a complex manner.
  • the high voltage causes the switch contacts are independently cleaned while the stop switch is pressed.
  • a method for generating and forwarding at least one voltage pulse having a cleaning effect for a stop switch is provided to a stop connection associated with the stop switch, the stop connection being provided on a digitally controlled magnetic ignition circuit arrangement of an electrical device, and wherein the digital controlled magneto ignition circuit arrangement generates a (at least one) voltage wave sequence of halfwaves decreasing in amplitude over time and / or at least one voltage pulse into a medium voltage range, wherein the method is characterized in that at least one of the voltage wave sequences decreasing with respect to its amplitude over time first half-wave temporally subsequent and thus a smaller amplitude having later wave of the voltage wave sequence forwarded to the stop connection or applied to this wi and thus exerts a cleaning effect on the stop switch and / or that when generating at least one voltage pulse in a medium voltage range of the or a plurality of voltage pulses are forwarded to the stop connection or applied thereto and thus exert a cleaning effect on the stop switch.
  • the magnetic ignition circuit arrangement can also generate a voltage wave sequence or voltage pulse sequence and is characterized in that the voltage wave sequence or voltage pulse sequence is subjected to filtering such that only excellent half-waves or pulses, for example only positive or only negative half-waves or pulses, are applied to the stop connection forwarded or applied to this and exert such a purifying effect on the stop switch.
  • This voltage wave sequence or voltage pulse sequence can then also have a constant or even increasing amplitude or pulse height, if it is suitably filtered or, after filtering, the magnitude of the voltage can still be adjusted, for example, by a resistor.
  • the method is of course not only suitable for cleaning stop connections in ignition circuits, but can generally be used in circuit arrangements.
  • a voltage is applied to the stop connection, which is a voltage in a medium voltage range, the pulses of which are therefore suitable for destroying an oxide layer on the contacts and thus bring about a self-cleaning of the contacts.
  • the procedure can be such that at least the first voltage pulse having a very high or higher amplitude is not forwarded to or placed on the stop connection.
  • switch is understood in the context of the present invention in a broad sense and includes, for example, buttons and the like.
  • forwarding the voltage is used in the context of this application for a simpler linguistic version in the sense that corresponding voltage wave sequence or voltage pulses generated in the circuit are placed on the stop connection.
  • the voltage pulses can have many different forms. Waveforms are possible, rectangular pulses and other pulse shapes as well.
  • a pulsed voltage is applied to the stop connection, this voltage being generated in an advantageous manner by a device-internal circuit arrangement, that is to say for example as ignition voltage or as another voltage wave sequence which is required in any case during operation of the device.
  • the multiple or individual voltage pulses for cleaning the stop connection can be switched to the stop connection at regular intervals.
  • the voltage is, optionally with their smaller pulses, but still need to be sufficient to allow self-cleaning of the switch contacts, applied to the switching terminal or forwarded to break through oxidation layers and to guarantee a clean contact of the buttons of a stop switch.
  • a medium-voltage sequence or a medium-voltage pulse which is generated in an internal circuit arrangement can be used directly to apply this to the stop switch.
  • individual voltage pulses are generated.
  • a decreasing voltage wave is generated.
  • a particular advantage with a medium voltage pulse derived according to the invention from an already existing pulsed internal voltage is that no (separate) switching elements are needed.
  • a magnetic ignition system according to the invention with digital control which usually takes place by a microcontroller, but can also be implemented differently, preferably the state of the stop switch by means of a Voltage signal from the digital controller (from the microcontroller) through the digital control checked or detected. On the one hand, it is determined whether the stop switch is open or closed. On the other hand, with particular advantage on this signal path for the purpose of self-cleaning of the stop contact additionally a medium voltage Freibrennimpuls (in the ignition module) is engaged.
  • mean voltage range is to be understood in the sense of the invention that the voltage is within a range in which a self-cleaning of the terminal contacts is possible, in which the voltage is high enough to remove contaminants or an oxide layer
  • the voltage is not so high in this range that there is a risk of electric shock when touching the contacts, and as far as the current state is concerned, the range of about 12 V to about 50 V peak voltage is considered as the range of the medium voltage.
  • the circuit arrangement may include an ignition voltage wave sequence and / or at least one ignition voltage pulse as ignition circuit arrangement and / or one of a high voltage as voltage wave sequence decreasing over time with respect to its amplitude or generate high voltage outgoing voltage wave sequence, with pulses or half-waves of the ignition voltage are used for switch cleaning, or it can be turned off by means of the stop connection if necessary, a spark.
  • the switch cleaning can also be done by means of voltage pulses that are generated in the Magnetzündscensan emblem extra for the purpose of the switch cleaning or other purposes than for the ignition itself.
  • the cleaning pulse has a fixed position or takes place at a known, fixed time.
  • the cleaning thus takes place at a defined time whenever or depending on the time at which the spark is output.
  • the stop port serves a stop function, such as turning off or preventing a spark. In particular, such a medium voltage stop can be realized.
  • every second half-wave of the voltage wave sequence and / or only medium voltage pulses and / or half-waves of the voltage wave sequence not leading to an electric shock and / or voltage pulses not leading to an electric shock can be forwarded to the stop connection and / or at least one can be forwarded to the stop connection Half-wave and / or at least one applied voltage pulse exert a cleaning effect on the stop connection by an unwanted (thin) oxide layer is broken and / or destroyed.
  • the primary pulse which may be higher than an average voltage
  • the second, fourth, sixth, etc. half-wave can be used for burnout of the stop switch. The burnout then takes place only during the spark.
  • the stop connection may be preceded by a component which conducts current only in one direction, in particular a diode, in such a way that only certain half-waves and / or voltage pulses are applied or forwarded to the stop connection.
  • a component which conducts current only in one direction in particular a diode, in such a way that only certain half-waves and / or voltage pulses are applied or forwarded to the stop connection.
  • the diode can ensure that only positive half-waves or positive voltage pulses are forwarded to the stop connection.
  • the negative half-waves are available for the spark so that the energy used to burn it down is limited.
  • a resistor upstream of the stop connection if appropriate also of a plurality of resistors, the at least one half-wave forwarded to the stop connection and / or the voltage of at least one voltage pulse can be adjusted.
  • a resistor may be provided between the diode or one or more other unidirectional current-conducting components and the stop terminal, optionally also an adjustable variable resistor that allows the strength of the blanking pulse (s) for the stop terminal up to a certain point (free) to adjust or change, so that a particularly suitable for burnout or destruction of the oxide layer voltage is applied to the stop connection.
  • the voltage at the stop connection can be limited by means of a voltage limitation.
  • a voltage limitation of the invention Medium voltage stops can be achieved in such a way that no voltage can build up so high that an electric shock could occur.
  • Such a protective element can additionally represent the protective circuit of a stop input.
  • a capacitor can be used which is connected upstream of the stop connection and which first has to be charged once for both an internal and an external voltage peak. If the capacitor is not yet fully charged, it represents a comparatively low-resistance component. Smaller voltage peaks can thus block the capacitor independently.
  • a zener diode may be provided which, in the event that the capacitor which precedes the stop connection, is no longer sufficient to limit the voltage, in turn acts as a voltage limiter.
  • the zener diode is connected in parallel with the capacitor.
  • care should be taken that the medium voltage pulse applied to the stop terminal is designed so that it can fully charge the capacitor. If this were not the case, the voltage levels desired or required at the stop connection could not be achieved.
  • a capacitor connected upstream of the stop connection can have a positive effect for the purification according to the invention. If an oxide layer is present on the stop switch, the voltage across the capacitor rises so high until the oxide layer is broken through and the current flow begins. The condenser empties and thus supports the burn-off process. Without a condenser, the burn-out process would be severely limited. Only the capacitor low-energy energy for cleaning the switch available after the oxide layer has started to give or break through.
  • a protective circuit of at least one pin of a microcontroller controlling the digital circuit arrangement can be realized.
  • the microcontroller in the case of a medium voltage stop, the microcontroller can be protected from excessive voltages.
  • supplementary or alternative to the described Cleaning method self-locking elements or hardware passages are implemented in the circuit.
  • a failure of an optionally provided decoupling resistor for the microcontroller can be counteracted.
  • Such a decoupling resistor is in fact regularly loaded by the medium-voltage pulses. A loss is therefore conceivable, and it should be provided as described hedges for this case.
  • the proper connection between a pin of a circuit controller controlling or provided for their control microcontroller and the stop connection by means of a self-locking construction, in particular with a capacitor at the stop connection and a resistor on the microcontroller, are checked.
  • connection between resistor and capacitor can be checked in two phases or by two processes.
  • the capacitor can be charged for a certain time and then read out by the microcontroller.
  • the microcontroller should recognize a high state when the connection is in a proper state. Is on the part of the microcontroller no High detected, either the external stop switch is pressed or, for the example of a Zündschaltanowski, the detonator could internally have a conclusion to the mass. In both cases, no spark would be emitted, so it does not matter that these cases are distinguishable in detail.
  • the pull-up resistor which may be provided in the microcontroller, can serve according to the invention in the self-locking circuit arrangement to detect the absence of the capacitor.
  • the microcontroller input itself has in turn a small capacity. If the capacitor is missing, the resistor pulls the input of the microcontroller to a high level.
  • care must be taken to ensure that it has a comparatively high impedance so that as little energy loss as possible is created.
  • the resistance of the digital circuit arrangement is expediently designed so that the capacitor is not charged too quickly at the stop connection.
  • the self-locking digital circuit arrangement for flexible detection of high and low states can have a microcontroller pin with an analog / digital converter and / or with a comparator or a comparator function.
  • the adjustable Threshold flexible and can be used to compensate for effects such as shunts.
  • a stop switch request for the stop connection may, in the context of the invention, function as described above in connection with the self-locking construction for phase 1 of securing the connection paths. It is thus possible to combine the two functions of the stop switch request and the phase 1 of securing the connection paths. The stop switch query is then part of the hedge.
  • a Zündscensan extract can be ensured by means of one, in particular by means of one or more diodes, hardware throughput that no switch spark is issued when switched stop switch regardless of the triggering of the ignition circuit by a microcontroller.
  • the hardware handle thus prevents the emission of a spark even in the case when the microcontroller would spontaneously output a spark.
  • a hardware penetration can, as well as the self-locking construction, be realized independently of a medium voltage stop or a cleaning of the stop connection.
  • a microcontroller which is designed as a Zündscensan extract and in which a hardware handling is realized such that the switching of the stop switch or pressing a stop button and the like causes no spark is output.
  • Such a hardware access according to the invention can be achieved for example by means of (depending on the type of circuit two) additional diodes in the circuit arrangement. If the stop switch is not actuated or pressed, a thyristor is thus switched through, for example, by a high level of a Zündausgangs, whereby a spark is triggered. On the other hand, when the stop switch is operated, the stop terminal is grounded.
  • a voltage which is greater than, for example, a voltage in the range of 0.7 volts can arise between a resistor connected upstream of the ignition pin of the microcontroller and a downstream diode which conducts current to the stop connection (depending on the specific design of the circuit, voltages are naturally also present in others Orders of magnitude conceivable).
  • a resistor downstream of the thyristor diode corresponding voltage is lost, so that no voltage builds up at the gate input of the subsequent thyristor, this never sou Kunststofft and thus no spark can be output when the stop switch is actuated.
  • the invention thus also relates generally to such a method for hardware penetration.
  • the voltage wave sequence and / or the at least one voltage pulse can be generated by a coil, possibly also a combination of several coil-like components, in particular by a coil with iron core and / or a coil penetrated by a magnetic field of a pole wheel and / or the primary side of an ignition coil. It is therefore possible in principle to generate a pulsed voltage or voltage waves or individual voltage pulses for cleaning a stop connection in different ways or to derive them from an (already existing) device-internal circuit arrangement.
  • the pulsed voltage can be obtained inter alia by a coil, which may be a coil with iron core, which is interspersed for example by the magnetic field of a rotor of an electric machine.
  • the pulse-shaped voltage of the primary side of the ignition coil is preferably a separate separate coil is then not required for burning the stop connection, so that the space for such additional components is saved with particular advantage.
  • a voltage source for the medium-voltage pulse is in the invention, therefore, preferably an existing coil, for example, one of the magnet rotor flooded coil with appropriate voltage amplitude, can be used.
  • the coil may also be the primary coil of the ignition transformer, which does not necessarily have to sit on a metal core through which the magnetic field flows. This then has in addition to its usual function, the task of the voltage source, which generates the wave-shaped voltage, which is optionally attenuated via a diode or a resistor, is forwarded to the stop connection.
  • the medium-voltage pulse or freewheeling pulse which arises from a voltage pulse present in the ignition module or for which an existing voltage pulse is used, has the advantage that no additional switch is required in order to generate a pulse from a voltage.
  • a burnout pulse is used to prevent current from flowing continuously (no continuous voltage applied).
  • the pulse-shaped voltage required for burnout of the switch contacts can be generated by means of a coil which is wound on the metal core of a detonator and through which the magnetic field of the pole wheel flows.
  • a separate coil instead of a already existing in the circuit coil, a separate, extra for the purpose of gaining a pulsed voltage (for the terminal cleaning or the medium voltage stop) recorded in the circuit coil to use.
  • a combined coil which already performs a function in the original circuit and additionally generates the cleaning pulses
  • any coil that can generate a voltage in the required strength suitable.
  • a medium-voltage coil is arranged on the metal core or iron core.
  • a capacitor in particular a starting capacitor, may be arranged in the circuit arrangement for forming a resonant circuit, wherein optionally the capacitor for charging by a voltage source, a current in one direction only Component, in particular a diode, and / or a connection to the mass-producing switch, which may be in the context of the invention quite generally an electronic switching element, are connected upstream.
  • the capacitor in particular an ignition capacitor, can therefore be charged via a voltage source of the circuit arrangement and an optionally this downstream diode. If the capacitor has then been charged and the correct time has arrived at an ignition circuit in order to emit a spark, then the switch or the switching element which also precedes the capacitor and which pulls the one side of the capacitor to ground is turned on.
  • the primary coil of the ignition circuit which is circuitry connected to the capacitor, supplied with power.
  • the other side Since the positively charged side of the capacitor is pulled by the switching to ground, the other side is correspondingly negative.
  • the diode connected upstream of the stop connection or another component which conducts current only in one direction then prevents a current flow from the stop connection in the direction of the ignition capacitor.
  • the ignition capacitor discharges, the magnetic field collapses and induces a voltage that is reversed in polarity. On the one hand, this voltage then recharges the capacitor, on the other hand it is forwarded to the stop connection or applied to it, made possible by the diode which is conductive on one side.
  • the primary pulse can thus be used alone for the spark or at another device-internal pulse voltage for another task provided for the circuit, while the second, fourth, sixth, etc. half-wave are used for the burnout of the stop switch. This has the advantage in an ignition circuit that the cleaning of the stop connection takes place only during the spark and also only a limited part of the energy that is available in total is used for this purpose.
  • a stop event assigned to the stop connection can be evaluated and / or interrogated independently of the at least one half-wave forwarded to the stop connection, in particular to enable a controlled shutdown of the electrical device and / or a shutdown without misfiring of the electrical device, and / or during the time not used for the cleaning, at least one further function can be placed on the stop connection, in particular a communication function.
  • the cleaning pulse has a fixed chronological arrangement. In the case of an ignition circuit, this means that the cleaning is always coupled with the generation of the spark. This offers the possibility of placing other functions on the stop connection in the remaining time. For example, such a Stopschalterabfrage, if appropriate via appropriate means for determining state or forwarding of signals can be realized. Corresponding functions can be implemented on a microcontroller. Furthermore, in principle a communication on the same line as the stop connection is possible. Such a communication could, for example, function in the same way as it did in the US 2008/02662706 A1 is described. However, for the implementation of additional functions at the stop port and the corresponding signal transmission functions, it should be noted that the circuits connected thereto must be protected from the expected voltage pulse (s).
  • the stop switch makes sense to combine the query of the stop switch with the application of the one or more medium voltage pulses to the stop switch.
  • the medium-voltage pulse then serves simultaneously as a stop switch query or to evaluate the stop switch state. This can be done, for example, so that the digital control of the magnetic ignition system measures the voltage at the stop switch during the medium voltage pulse. If a certain level or one of the control for a voltage comparison predetermined voltage value is exceeded, the stop switch is open. Is the level falls below or the predetermined voltage value is not reached, the stop switch is closed. A separate switch polling pulse is not needed.
  • the invention relates to a digitally controlled magnetic ignition arrangement of an electrical device having a stop connection associated with a stop switch, wherein the digital magnetic ignition device generates and propagates at least one voltage pulse having a cleaning effect for the stop switch to the stop connection, in particular according to a method as described above, and wherein the Magnetzündscensan extract is designed to generate a voltage wave sequence of over time with respect to their amplitude decreasing half-waves and / or for generating at least one voltage pulse in a medium voltage range.
  • This digitally controlled ignition circuit arrangement is distinguished by the fact that, in the case of a voltage wave sequence decreasing over time with respect to its amplitude, for propagating at least one subsequent half-wave of the voltage wave sequence which is temporally subsequent and thus has a smaller amplitude, as a voltage pulse which has a cleaning effect. is formed at the stop connection and / or that the ignition circuit is formed when generating at least one voltage pulse in a middle voltage range for forwarding the one or more voltage pulses to the stop port and thus exerts a cleaning effect on the stop switch.
  • the invention further relates to a hand-held internal combustion engine having such a magnet firing arrangement or a magnetic ignition system, which will be described in more detail below.
  • the electrical device is thus in this case provided for hand-held device with an internal combustion engine.
  • the hand-held device with the internal combustion engine is provided with a digitally controlled Magnetündscensan extract and in particular designed for Carrying out a method as described above.
  • the apparatus or the magnetic ignition circuit arrangement has a stop connection associated with a stop switch, the magnetic ignition arrangement being designed to generate and apply at least one voltage pulse having a cleaning effect for the stop switch to the stop connection, and wherein the magnetic ignition arrangement generates a voltage wave sequence over time with respect to the latter Amplitude decreasing half-waves and / or for generating at least one voltage pulse in a middle voltage range is formed.
  • the Magnetzündscensan extract is at a decreasing with respect to their amplitude voltage wave sequence for applying at least one of the first half wave temporally subsequent and thus a smaller amplitude having later half wave of the voltage wave sequence as a voltage pulse to the stop connection and / or that when generating at least one voltage pulse in a medium voltage range designed to apply the one or more voltage pulses to the stop connection, whereby a purifying effect is exerted on the stop switch in each case.
  • the digital circuit arrangement has components with which a device-internal pulse-shaped voltage can be generated, which may be, for example, an ignition voltage or another suitable voltage.
  • the pulsed voltage used is an internal voltage which does not have to be generated additionally for the stop connection or exclusively for a cleaning function. There is no room for an extra coil of its own, as in the case of the analogue igniters, where a medium voltage cleaning is realized.
  • the pre-connection of a diode or comparable components, optionally in combination with a resistor, before the stop connection may be expedient or necessary.
  • the range of the mean voltage according to the invention may comprise voltages of 12 V to 50 V peak voltage.
  • the magnetic ignition circuit arrangement may be designed to generate an ignition voltage wave sequence and / or at least one ignition voltage pulse, and / or the magnetic ignition circuit arrangement may be designed to generate a voltage wave sequence starting from a high voltage and decreasing with respect to its amplitude over time.
  • the magnetic ignition circuit arrangement can be designed to forward every second half-wave of the voltage wave sequence and / or only medium voltage pulses and / or half waves of the voltage wave sequence not leading to an electric shock and / or to voltage pulses leading to an electric shock to the stop connection and / or at least one
  • the half-wave relayed to the stop connection and / or at least one voltage pulse applied to the stop connection can be designed to clean the stop connection by breaking and / or destroying an undesired oxide layer.
  • the stop connection can be preceded by a component which conducts current only in one direction, in particular a diode, in such a way that only certain half-waves and / or voltage pulses are applied to the stop connection. In addition, if necessary, a current drain from the stop connection in the direction of further components of the circuit arrangement is prevented.
  • the stop connection can be preceded by a resistor, via which the at least one half-wave forwarded to the stop connection and / or the at least one voltage pulse can be adjusted in its or its voltage. The resistance serves to adjust the strength of the forwarded half-wave or the half-waves to be relayed and, if appropriate, to adapt, for which purpose the resistance can be made exchangeable or changeable.
  • the voltage at the stop connection of the digitally controlled circuit arrangement can be limited, and / or the circuit arrangement can be a protective circuit of at least one pin or for at least one input of the Have circuit arrangement controlling microcontroller. Due to the increased in the medium voltage stop compared to the low voltage stop voltages in the circuit, it is expedient to realize in the Zündscensan instrument a good or better protection of the microcontroller. By a hardware-side barrier of a thyristor accidental ignition can be prevented in an ignition circuit; The microcontroller can then ignite incorrectly due to the hardware handle.
  • the proper connection between a pin of the magnetic microcontroller controlling the magnetic ignition circuit and the stop connection can be verifiable by means of a self-locking construction of the circuit arrangement, in particular with a capacitor at the stop connection and a resistor at the microcontroller.
  • the magnetic ignition circuit arrangement can have a coil, in particular a coil with iron core and / or a coil penetrated by a magnetic field of a pole wheel and / or the primary side of an ignition coil for generating the voltage wave sequence and / or the at least one voltage pulse.
  • a voltage sequence or impulses for device-internal use are provided in the ignition circuit arrangement. Shares of this voltage sequence are then forwarded to the stop port to perform a cleaning function there.
  • a voltage pulse from the ignition system so, for example, the periodic pulse of a coil of the magneto is used, which is arranged on an iron core, which is flooded by a passing magnet of a flywheel.
  • the periodic pulse can be used, which is applied to the primary coil of the Zündübertragers (in a capacitor discharge ignition) or the ignition coil (in a magnetic transistor ignition).
  • the primary coil of the Zündübertragers in a capacitor discharge ignition
  • the ignition coil in a magnetic transistor ignition
  • a pulse or a pulse train of up to a few 100 V is applied to the primary coil.
  • a capacitor in particular an ignition capacitor, be arranged to form a resonant circuit in the circuit arrangement, wherein optionally the capacitor for charging by a voltage source in one direction only current conducting device, in particular a diode, and / or a connection to Mass-producing switch is connected upstream.
  • a stop event associated with the stop terminal may be evaluated and / or interrogated independently of the at least one forwarded to the stop port half wave or the one or more voltage pulses, in particular for enabling a controlled shutdown and / or a shutdown without misfiring of the electrical device, and / or during the time not used for cleaning at least one further function can be placed on the stop connection, in particular a communication function.
  • the digitally controlled magnet ignition circuit arrangement of the electrical device enables a controlled shutdown without a misfire.
  • FIG. 1 an analog circuit 1 according to the prior art with switch cleaning is shown.
  • This analog circuit 1 is an ignition circuit and has on the one hand a charging coil 2 and on the other hand, a switch coil 3, which are arranged with the same orientation on a metal core 4. Furthermore, a trigger coil 5 is provided. Characterized in that both the charging coil 2 and the interrupter coil 3 are placed with the same orientation on the metal core 4, the phase position of the voltage is the same. This results in that whenever the charging coil 2 is charged, and the thyristor 6 of the analog circuit 1 is turned on. The voltage produced at the interrupter coil 3 results in a medium-sized voltage at a stop terminal of the analog circuit according to the stop switch 7.
  • Other components in the analog Circuit 1 are the resistors 8, the coil 3b, the capacitor 9 and the diode 10th
  • FIG. 2 shows a schematic diagram of a digitally controlled Magnetündscensan extract 11 according to the invention.
  • a voltage source 12 is initially provided, by means of which a firing capacitor 14 is charged via a diode 13.
  • a switch 15 and an electronic switching element is provided upstream of the ignition capacitor 14, parallel to the diode 13, a switch 15 and an electronic switching element is provided.
  • the switch 15 is switched when the capacitor is charged and the right time has come to issue a spark.
  • the switch 15 the nearest side or connected to the switch 15 electrode of the capacitor is pulled to ground.
  • the primary coil 16 of the digital circuit 11 is supplied with power. Since the positively charged side of the capacitor 14 of the digitally controlled circuit 11 is pulled to ground, the other side is therefore negative.
  • the diode 21 serves, as described below, to forward only certain half-waves of an ignition pulse train to the stop connection 18.
  • the magnetic field collapses and induces a voltage that is reversed in polarity.
  • this voltage charges the capacitor 14, on the other hand it is conducted to the stop connection 18.
  • the primary pulse is used only for the spark of the ignition coil 19 with the primary coil 16 and the secondary coil 17.
  • On the side of the secondary coil 17 of the transformer of the ignition coil 19 is thus at a high voltage 20 at.
  • a voltage waveform 22 according to the invention is shown on a firing capacitor such as the capacitor 14 during sparking.
  • the voltage is plotted on the vertical ordinate 23, and the time on the horizontal abscissa 24.
  • the half-waves of the voltage wave sequence 22 are designated by the reference symbols 31, 32, 33,..., 36. It is designated by the reference numeral 31, the first half-wave, with 32, the second half-wave, etc.
  • the vertical line 25 indicates the start of the spark.
  • the primary pulse or first half-wave 31 is used only for the spark. Only the second, fourth, sixth, etc. half-cycles (half-waves 32, 34, 36) are used to clean the stop connection.
  • the cleaning pulses thus have a fixed time position. In the remaining time other functions can be put on the stop connection, For example, a switch position query or a communication on the same line.
  • FIG. 3 is a schematic illustration of another digitally controlled magneto ignition circuit 40 of the invention.
  • the digitally controlled magnet ignition circuit arrangement 40 is controlled (on) by means of a microcontroller 41, which on the one hand has a stop pin 42, on the other hand has an ignition output 43.
  • the microcontroller 41 may be part of the digitally controlled magneto ignition circuitry 40 according to the invention.
  • the ignition capacitor 46 With the aid of a voltage source 44, the ignition capacitor 46 is charged via the diode 45. If the ignition capacitor 46 is charged and the right time has come to issue a spark, the thyristor 47 is switched. This pulls the node K1 or the corresponding side of the ignition capacitor 46 to ground.
  • the ignition capacitor 46 is quasi-parallel to the primary coil 48 of the ignition coil 49 with the secondary coil 50th
  • the high voltage on the secondary coil 50 side of the ignition coil assembly 49 is indicated at 51. Since the positively charged side of firing capacitor 46 is pulled to ground, the other side associated with node K2 is negative.
  • the diode 52 prevents a current flow from the stop connection 53 in the direction of the ignition capacitor 46. After the ignition capacitor 46 has discharged, the magnetic field collapses and induces an opposing voltage as viewed from the polarity. On the one hand this voltage charges the ignition capacitor 46, on the other hand it is applied to the stop connection 53. Due to this approach, the primary pulse is used only for the spark. Only the later, even-numbered half-waves serve for burning the stop switch or stop connection 53. This burn-out takes place only during the spark, so that only a limited portion of the energy is used for this purpose.
  • the resistor 54 serves to adjust the strength of the burnout pulse for the stop switch 53. If an oxidation layer has formed on the stop switch, it loads Medium voltage pulse further provided in the circuit 40 (parallel to the stop terminal 53 with one side to ground) provided capacitor 55. The capacitor 55 thus has a supporting effect for the burnishing or cleaning of the stop switch.
  • the node K3 of the digital circuit 40 is located toward the stop terminal 53 between the nodes of the capacitor 55 and the zener diode 61 as viewed from the resistor 54.
  • the cleaning pulse is output at a fixed timing depending on the timing of the lighting. In the remaining time, additional functions can be placed on the stop connection 53. However, if necessary, circuit components must be protected from the expected voltage pulse or the voltage wave sequence. This is done in the Magnetzündscensan extract 40, the resistor 56th
  • a hardware-side barrier of the thyristor 47 is realized by the diodes 57 and 58. If the stop connection 53 is grounded by means of the stop switch, not shown here, the voltage at the gate terminal of the ignition thyristor 48 can no longer rise so high that it would trigger. A faulty ignition of the microcontroller 41 can thus be excluded.
  • a fuse of the circuits or circuit components is also realized in connection with the medium voltage stop according to the invention with self-cleaning function. In the event of failure of the decoupling resistor 56, which is connected upstream of the stop pin 42 of the microcontroller 41 and is regularly loaded by the medium-voltage pulses, it can be ensured, for example, by a self-locking design, that sparking is not continued to be output. If a stop is not recognized by the microcontroller 41, a hardware access is activated. However, this case is considered rather unlikely.
  • the capacitor 55 must be positioned as close as possible to the stop connection 53.
  • the resistor 60 is close to the Mikrocontrollerpin, here the stop pin 42 to arrange.
  • a charge-end charging process ensures that the line between the microcontroller 41 and the stop connection 53 has neither been interrupted, nor is there a permanent high or low level on this line.
  • FIG. 5 is a sketch of the voltage waveforms at the three nodes K1, K2 and K3 of the circuit 40 of FIG. 4 shown. In each case the voltage in volts is plotted on the ordinate, the time in seconds on the abscissa.
  • the upper voltage curve for the node K1 shows the voltage curve on the microcontroller 41 facing side of the ignition capacitor 46. Below the voltage waveform or voltage waveform at the node K2 on the stop port 53 facing side of the ignition capacitor 46 is shown.
  • the voltage curve at the node K3 close to the stop connection 53 is at the bottom in the illustration of FIG. 5 is shown, from this voltage curve it can be seen that in each case only the even half-waves of the voltage wave sequence at the node K2 are forwarded in the direction of the stop connection 53 and used for burnout or cleaning.
  • FIG. 6 shows a protection and limiting circuit 62 according to the invention, which is a combined circuit consisting of the circuits 63 (protection circuit) and 64 (medium voltage pulses).
  • Components of this voltage limitation or the protective circuit between a microcontroller 65 and a stop connection 66 are a resistor 67, a Zener diode 68 and a capacitor 69.
  • This may be of course, to the corresponding elements, for example according to the circuit arrangement 40 of FIG. 4 act. But it is also a realization regardless of the concrete circuit 40 of the FIG. 4 conceivable.
  • the voltage limitation of the medium voltage stop means that no voltage can build up that would be so high that an electric shock would be feared.
  • This protection element simultaneously represents the protective circuit of the stop input.
  • the capacitor 69 For both an internal and an external voltage peak, the capacitor 69 must first be charged. As long as he is not fully charged, he is relatively low impedance. Smaller voltage spikes, the capacitor 69 block independently. If the capacitor is no longer sufficient to block the voltage peaks, the voltage rises until the Zener diode 68 in turn engages as a voltage limiter.
  • the medium voltage pulse must be of a size sufficient to fully charge the capacitor 69. If this were not the case, the voltage levels at the stop connection 66 would not reach the desired level.
  • the capacitor 69 has a positive effect on the burn-off process, namely, in the event that an oxide layer is present on the stop switch, the voltage across the capacitor 69 rises so high until the oxide layer is broken and the current flow can begin.
  • the condenser 69 then empties and thus supports the cleaning process.
  • the already known protection circuit 63 is therefore combined with the circuit 64, which shows the parts required for an exemplary medium voltage stop.
  • the Zener diode 68 and the capacitor 69 are used twice. By combining the protective circuit and the limiter circuit 63, 64 so components and costs are saved.
  • the coupling of the cleaning pulses is so advantageously such that already existing components (the protection circuit 63) are used for the signal shaping of the medium-voltage Freibrennimpulses according to the combined circuit 62.
  • the voltage amplitude is limited by the zener diode 68, which otherwise has the function of protecting the controller 62 from high interference pulses or to cut them.
  • the capacitor 69 which is otherwise also responsible for protecting the controller 62 from high glitches, stores energy from the engaged medium-voltage burnout pulse and, in the burn-off process, flows current over the stop contact to blow it free. It can be checked in the sense of self-assurance of the circuit 62.
  • FIGS. 7 and 8th show schematic diagrams for the generation of medium voltage pulses by means of coils.
  • a trigger coil 70 is shown on a metal core 71.
  • the charging coil 72 is shown on the other side of the metal core 71.
  • a separate medium-voltage coil 73 for generating the medium-voltage pulses is also arranged on this side. This separate medium-voltage coil 73 is missing in the arrangement of FIG. 8 , There, the charging coil already present in the circuit is used to generate the medium-voltage pulses.
  • a resistor 74 followed by a diode 75 at.
  • a resistor 76 is as well as in the representation of FIG. 8 made a connection 76a to a stop pin of a microcontroller, which is not shown here for clarity.
  • the stop connection 79 in the manner already explained above, is connected in parallel with a Zener diode 77 and a capacitor 78 with the side facing away from each other. Furthermore, the stop switch 80 associated with the stop terminal 79 is shown.
  • the charging coil 72 fulfills both its normally provided in the switching arrangement function, as well as for generating the medium voltage pulses, in front of the resistor 74 and after the charging coil 72 parallel to the resistor 74, a further diode 81, which does not make the connection to the stop terminal 79, but the connection to the charging destination.
  • the charging coil 72 can fulfill two functions.
  • a coil other than the charging coil 72 may be used as a combined coil (also) for generating medium-voltage pulses.
  • FIG. 9 shows a self-locking construction 90 of a digital circuit arrangement according to the invention with a stop port 91 and a microcontroller 92.
  • the stop port 91, a capacitor 93 is connected in parallel with the opposite side to ground.
  • the capacitor 93 is to be provided as close as possible to the stop connection 91 or to an external connection of the circuit arrangement.
  • the resistor 94 which is a pull-up resistor, on the other hand, is as close as possible to the microcontroller 92.
  • the resistor on the microcontroller 92 may optionally also be an internal resistor of the microcontroller 92.
  • the path thus secured by means of the self-locking construction 90 is shown in FIG FIG. 9 designated by the reference numeral 95.
  • phase 1 in the FIG. 10 the reference numeral 96 is assigned, the capacitor 93 is charged for a certain time and then read out again.
  • the microcontroller 92 should read in this case a high level. If this is not the case, either the external stop switch is pressed or the igniter of an ignition switch assembly internally has a ground connection. In both cases, no spark is output or another circuit function is not executed, so that a differentiation of the cases is not required.
  • phase 1 If, as expected, a high is read in phase 1, the transition to phase 2 takes place with reference numeral 97.
  • the capacitor 93 is discharged and then read again.
  • the microcontroller 92 should now recognize a low level. If this is not the case, there are again several possibilities for error such as an igniter-internal interruption between the resistor 94 and the capacitor 93, a missing capacitor 93, a End on the supply voltage, etc. These cases must also not be further differentiated, since they all lead to the switching off of the ignition spark in an ignition circuit.
  • the vertical lines 98 and 99 exemplify locations in the waveform for the measurements of the self-locking construction 90, respectively.
  • the pull-up resistor 94 of the self-locking construction 90 is required to detect the absence of the capacitor 93, since the input of the microcontroller 92 also has a low capacitance.
  • the resistor 94 pulls the input of the microcontroller 92 in the absence of the capacitor 93 to a high level and should be designed as high as possible for energy saving reasons.
  • the resistor 94 must not charge the capacitor 93 at the stop port 91 too fast.
  • a microcontroller 92 with analog / digital converter or with a comparator can be used for flexible detection of high and low levels or states.
  • a Stopschalterabfrage can be realized as well as the phase 1 according to the reference numeral 96 of securing the connection paths in the self-locking construction 90.
  • FIG. 11 shows a schematic diagram of a hardware handle 100 according to the invention, can be ensured by the example in an ignition circuit that the igniter outputs a spark at a switched stop switch, even if a microcontroller 101 wanted to spend a spark. This can be achieved by the additional diodes 102 and 103 as shown here. In the event that the stop terminal 104 associated with the stop switch is not pressed, is switched by a high level of the ignition output of the thyristor 105. This will trigger a spark.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP09177619A 2009-12-01 2009-12-01 Procédé de production et d'application d'une impulsion de tension nettoyante sur un raccordement d'arrêt, ainsi qu'agencement de circuit d'allumage magnétique numérique correspondant Withdrawn EP2330606A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09177619A EP2330606A1 (fr) 2009-12-01 2009-12-01 Procédé de production et d'application d'une impulsion de tension nettoyante sur un raccordement d'arrêt, ainsi qu'agencement de circuit d'allumage magnétique numérique correspondant
US12/956,286 US8689756B2 (en) 2009-12-01 2010-11-30 Method for generating and applying a cleaning voltage pulse to a stop connection, and an associated digitally controlled magnetic ignition circuit

Applications Claiming Priority (1)

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EP09177619A EP2330606A1 (fr) 2009-12-01 2009-12-01 Procédé de production et d'application d'une impulsion de tension nettoyante sur un raccordement d'arrêt, ainsi qu'agencement de circuit d'allumage magnétique numérique correspondant

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
DE102013016028A1 (de) 2012-10-31 2014-04-30 Prüfrex engineering e motion gmbh & co. kg Zündverfahren für eine Brennkraftmaschine sowie danach arbeitende Zündvorrichtung
DE102021203041B3 (de) 2021-03-26 2022-09-29 Prüfrex engineering e motion gmbh & co. kg Erkennung der Betätigung eines Stoppschalters einer Zündvorrichtung

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US4610237A (en) * 1985-02-21 1986-09-09 Wedtech Corp. Ignition circuit, especially for magneto-triggered internal combustion engines
US4697570A (en) * 1985-02-21 1987-10-06 Wedtech Corp. Electronic ignition circuit with automatic control advance
US4976234A (en) * 1989-11-07 1990-12-11 Mitsubishi Denki Kabushiki Kaisha Internal combustion engine stop device
EP0866480A2 (fr) 1997-03-20 1998-09-23 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Circuit pour l'alimentation d'une charge dans un circuit électrique
DE20014502U1 (de) * 2000-08-22 2000-12-07 Pvl Electronic Germany Kondensator-Zündanlage
DE102004059070A1 (de) * 2004-08-20 2006-02-23 Prüfrex-Elektro-Apparatebau Inh. Helga Müller, geb. Dutschke Zündverfahren mit Stopschalter für Brennkraftmaschinen
US20080252219A1 (en) * 2007-04-13 2008-10-16 Shao Xing Fenglong Electrical Machinery Co., Ltd. Ignition control device
US20080266270A1 (en) 2007-04-27 2008-10-30 Kabushiki Kaisha Toshiba Electrostatic Pad Apparatus and Information Processing Apparatus

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JP3145501B2 (ja) * 1992-09-21 2001-03-12 富士重工業株式会社 エンジン停止装置
JP3730286B2 (ja) * 1995-07-12 2005-12-21 富士重工業株式会社 エンジン停止装置
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US4610237A (en) * 1985-02-21 1986-09-09 Wedtech Corp. Ignition circuit, especially for magneto-triggered internal combustion engines
US4697570A (en) * 1985-02-21 1987-10-06 Wedtech Corp. Electronic ignition circuit with automatic control advance
US4976234A (en) * 1989-11-07 1990-12-11 Mitsubishi Denki Kabushiki Kaisha Internal combustion engine stop device
EP0866480A2 (fr) 1997-03-20 1998-09-23 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Circuit pour l'alimentation d'une charge dans un circuit électrique
DE20014502U1 (de) * 2000-08-22 2000-12-07 Pvl Electronic Germany Kondensator-Zündanlage
DE102004059070A1 (de) * 2004-08-20 2006-02-23 Prüfrex-Elektro-Apparatebau Inh. Helga Müller, geb. Dutschke Zündverfahren mit Stopschalter für Brennkraftmaschinen
US20080252219A1 (en) * 2007-04-13 2008-10-16 Shao Xing Fenglong Electrical Machinery Co., Ltd. Ignition control device
US20080266270A1 (en) 2007-04-27 2008-10-30 Kabushiki Kaisha Toshiba Electrostatic Pad Apparatus and Information Processing Apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013016028A1 (de) 2012-10-31 2014-04-30 Prüfrex engineering e motion gmbh & co. kg Zündverfahren für eine Brennkraftmaschine sowie danach arbeitende Zündvorrichtung
US9574539B2 (en) 2012-10-31 2017-02-21 Pruefrex Engineering E Motion Gmbh & Co. Kg Ignition method for an internal combustion engine and an ignition device operated accordingly
DE102013016028B4 (de) 2012-10-31 2019-07-18 Prüfrex engineering e motion gmbh & co. kg Zündverfahren für eine Brennkraftmaschine sowie danach arbeitende Zündvorrichtung
DE102021203041B3 (de) 2021-03-26 2022-09-29 Prüfrex engineering e motion gmbh & co. kg Erkennung der Betätigung eines Stoppschalters einer Zündvorrichtung

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US8689756B2 (en) 2014-04-08

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