EP2330606A1 - Method for creating and applying a cleaning voltage impulse to a stop connection and accompanying digitally controlled magnetic ignition switch assembly - Google Patents

Abstract

The method involves producing voltage wave sequence from half-waves and/or voltage impulse in a middle voltage range, where the half-waves are decreased at a time regarding the amplitude. One of the half-waves that exhibit small amplitude in the voltage wave sequence is applied to stop connectors (53). Multiple voltage impulses are applied to the stop connectors such that cleaning effects exert on a stop switch, during generation of the voltage impulses in the middle voltage range. The voltage impulse is produced using a coil with an iron core. An independent claim is also included for a manual handling electrical device with a combustion engine.

Description

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

In many electrical devices or machines stop switches are used, in which contacts or contact surfaces are provided, where there is the problem that it can lead to contamination. For example, 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.

For cleaning such switches, there are different approaches in the prior art. For example, the switch cleaning by sliding contacts is known. In this case, sliding switches are used for self-cleaning of the contact surfaces. When the switch is actuated, one contact grinds over the other, so that dirt of all kinds is removed from the contact surfaces as a result of this sliding movement. This is to ensure that it comes to a reliable contacting of the contact surfaces. The contact surfaces are scraped free again by each actuation of the switch.

In addition, there is the concept of switch cleaning by high voltage pulses. 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. In this type of 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. In the high voltage stop method, 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. On the other hand, the high voltage causes the switch contacts are independently cleaned while the stop switch is pressed.

In older analogue ignition circuits, there is often a separate coil for stopping. Now, if the stop switch is pressed, builds on a firing capacitor of the analog circuit voltage no longer and the detonator no longer sparks. This is achieved by placing the charging coil and the breaker coil with the same orientation on a metal core. As a result, the phase position of the voltage is the same and it is always when the charging coil wants to load, also controlled by a correspondingly provided in the circuit thyristor. The voltage generated at the pickup coil leads to a medium-sized voltage at the stop connection.

The problem with this method, however, is that the last spark is emitted at an uncontrollable time and thus the probability of a misfire is very high.

In digital Zündschaltungsanordnungen a controlled by a microcontroller igniter is used instead of an analogue igniter. For this there is in addition to the already described high voltage stop the concept of low voltage stop, the low voltage stop, in which voltage pulses in the power supply area of the digital control or used, but has no cleaning effect on the switch contacts of the stop switch. A self-cleaning of the contacts does not take place in this process.

Accordingly, it is an object of the invention to specify a method improved in this respect or a magnetically controlled circuit arrangement improved digitally or to be controlled in this regard.

To achieve this object, 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. In the method according to the invention for cleaning switches in digital Magnetzündanlagen related to the cleaning disadvantages of the known low-voltage stop and the high voltage stop for igniter are avoided. According to the invention, for example, 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. Alternatively or additionally, in the case of a voltage wave sequence with decreasing amplitude, 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. In contrast to the short-circuiting of the charging coil during the high-voltage stop, in which the first very high voltage pulses are present at the stop connection after the short circuit, this has the advantage that complicated insulation is not required for the switch cleaning provided according to the invention. In both cases, the Switch contacts are cleaned of dirt. The term "switch" is understood in the context of the present invention in a broad sense and includes, for example, buttons and the like. The term "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.

Thus, according to the invention, 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. Likewise, alternatively or additionally, a medium-voltage sequence or a medium-voltage pulse which is generated in an internal circuit arrangement (in any case or for this purpose) can be used directly to apply this to the stop switch. As a rule, individual voltage pulses are generated. In the case of voltage generation by means of ignition capacitors, 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. In 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.

The term "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 On the other hand, 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. In a high-voltage stop, on the other hand, peak voltages of 250 V and 50 V rms voltages are reached, which can cause noticeable electric shocks when touched, so in the case of a hand-held machine there is a risk of operator distress or pain , the machine "rips off." The effective voltage during medium voltage stop On the other hand, it is hardly perceived or felt, especially with the usually short pulse durations.

In tests it could be shown in connection with ignition circuits that already a voltage of about 15 volts is sufficient to break through thin oxide layers. Furthermore, from the EP 0 866 480 A2 It is known that even relatively small stresses have a cleaning effect on contact points.

As mentioned above, 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. Of course, the switch cleaning can also be done by means of voltage pulses that are generated in the Magnetzündschaltungsanordnung extra for the purpose of the switch cleaning or other purposes than for the ignition itself.

If the waves of an ignition voltage wave sequence are used to achieve the inventive release of the stop switch or the stop connection of contaminants, this has the advantage that 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. Of course, in addition to the cleaning effect, 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.

According to the invention, 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.

If only the later half-waves, in particular depending on the incorporation of suitable circuit components, only the even-numbered half-waves, are forwarded to the stop connection, then the primary pulse, which may be higher than an average voltage, stands for a (different) device-internal one Function, for example, for the spark, alone available. In this case, then 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. By passing only certain or later half-waves or pulses to the stop connection, there is the advantage that only a limited part of the total energy is used for destroying the oxide layer or for burning the stop connection.

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. For an ignition circuit, for example, 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.

By means of 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. For example, 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.

Furthermore, according to the invention, the voltage at the stop connection can be limited by means of a voltage limitation. By 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. For this purpose, 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. In addition to the capacitor, 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. For the voltage limiting circuit, 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. Furthermore, 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.

Furthermore, according to the invention, a protective circuit of at least one pin of a microcontroller controlling the digital circuit arrangement can be realized. For example, in the case of a medium voltage stop, the microcontroller can be protected from excessive voltages. In this context, in particular in the case of a medium voltage stop, supplementary or alternative to the described Cleaning method self-locking elements or hardware passages are implemented in the circuit. Thus, for example, 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.

According to the invention, 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.

Of course, it is also possible to realize such a self-locking construction independently of a medium voltage stop or the generation and transmission of cleaning pulses for the stop connection. In this case, therefore, there is a digital circuit arrangement in which the connection between the or even more microcontroller pins and the external connection is checked as part of a self-backup. The self-locking is done for example by means of a capacitor close to the external terminal and a resistor close to the controller. Optionally, the resistor on the microcontroller may be replaced by a microcontroller-internal pull-up resistor. The capacitor is connected to the stop connection on one side and grounded on the other side.

The connection between resistor and capacitor can be checked in two phases or by two processes. For example, in the first phase, the capacitor can be charged for a certain time and then read out by the microcontroller. In this case, 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 Zündschaltanordnung, 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.

If, however, as expected, a high state or level is detected by the microcontroller, then the transition to the second phase or the second process takes place. The capacitor is discharged and then read in again. The microcontroller should now recognize a low state. If, contrary to expectation, no low state is detected, several errors may be decisive for this, for example, in the foreground application of an ignition switch arrangement an igniter-internal interruption between the resistor and an associated capacitor, the absence of the capacitor, a conclusion on the supply voltage, etc. All these Errors lead to the ignition of the spark, so that a further differentiation is not required.

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. When dimensioning the pull-up resistor, care must be taken to ensure that it has a comparatively high impedance so that as little energy loss as possible is created. Furthermore, the resistance of the digital circuit arrangement is expediently designed so that the capacitor is not charged too quickly at the stop connection.

Furthermore, 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. Thus, 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.

In a Zündschaltungsanordnung 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. Of course, such 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. In this case, therefore, generally only one digital circuit arrangement is provided with a microcontroller, which is designed as a Zündschaltungsanordnung 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. By a hardware throughput on the power part of the magneto ignition can thus be prevented directly or directly with a closed stop switch on the digital control over a triggering of the spark

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. By means of a first diode, 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). About 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 durchsteuert 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. For the present application of digital ignition circuits, it is useful to take the pulse-shaped voltage of the primary side of the ignition coil. 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. As 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. In this case, as mentioned, can be dispensed with a separate coil. However, it is also within the scope of the invention, 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. In an embodiment with a combined coil (which already performs a function in the original circuit and additionally generates the cleaning pulses), it is not necessary to use the (ignition) charging coil as a source for the pulses. In principle, any coil that can generate a voltage in the required strength, suitable. In the case of an additional coil in the circuit, for example, in addition to the charging coil, a medium-voltage coil is arranged on the metal core or iron core.

In addition to the coil, 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. Thus, the primary coil of the ignition circuit, which is circuitry connected to the capacitor, supplied with power.

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.

If, for example, in principle the second half-wave and, if appropriate, further higher half-waves of the voltage wave are used to eliminate soiling, 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).

To query the position of the stop switch different solutions are conceivable. In the context of the invention, it 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.

Furthermore, 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 Magnetzündschaltungsanordnung 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 according to the invention 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 Magnetündschaltungsanordnung 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 Magnetzündschaltungsanordnung 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.

About the use of the later half-waves of a voltage wave sequence with half-waves of decreasing voltage or via the use of a voltage wave train or a pulse train with pulses that are a priori in a middle, suitable voltage range, so is a stop connection, which is provided in the digitally controlled circuit arrangement , cleaned. 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. Also, additional complementary components of a more complex nature are not required. This allows the Manufacturing costs are kept low. However, depending on the nature of the digitally controlled circuit arrangement or the voltage pulse generation taking place there, 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.

Furthermore, 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 forwarding of unsuitable for cleaning pulses, such as pulses with too high a voltage at which there is a risk of electric shock can thus be prevented as in the case of Zündschaltungsanordnung by simple electronic components or their interaction. This allows the waves to be filtered according to their sign. The voltage wave pulses are then filtered in the simplest case, whether they are positive or negative. In the context of the invention, however, there is also a targeted, active selection or filtering certain voltage waves or certain half-waves with a suitable amplitude, for example by a digital signal processing or by the implementation of specific, boundary conditions or specifications of defined selection and / or filter criteria in the digital circuit arrangement.

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.

By means of a voltage limitation, in particular by using at least one capacitor and / or at least one Zener diode, 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 Zündschaltungsanordnung 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.

Thus, in the ignition circuit arrangement by means of a hardware implementation, in particular realized by means of (two) diodes, it is ensured that no ignition spark can be output by a microcontroller, regardless of the triggering of the ignition circuit, when the stop switch is switched. This thus represents the special case of a hardware throughput for an ignition circuit arrangement as a digitally controlled circuit arrangement.

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. Optionally, other electrical or electronic components, by means of which a voltage sequence or impulses for device-internal use can be generated, 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. As 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. Furthermore, as a voltage pulse from the Zündschaltungsanordnung 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). During each high-voltage pulse or spark produced, a pulse or a pulse train of up to a few 100 V is applied to the primary coil. Are the voltage values of the If the pulses present are too high for forwarding to the stop connection, the pulses for application to the stop connection may be appropriately attenuated.

In addition to the 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. Thus, according to the invention, the digitally controlled magnet ignition circuit arrangement of the electrical device enables a controlled shutdown without a misfire.

Figur 1

einen analogen Schaltkreis mit Schalterreinigung gemäß dem Stand der Technik,

Figur 2

eine Prinzipskizze einer digital gesteuerten Schaltungsanordnung gemäß der Erfindung,

Figur 3

eine Spannungswellenfolge gemäß der Erfindung an einem Zündkondensator während des Zündfunkens,

Figur 4

eine Prinzipskizze einer weiteren digital gesteuerten Schaltungsanordnung der Erfindung,

Figur 5

eine Skizze der Spannungsverläufe an drei Knoten der Schaltungsanordnung der Figur 4,

Figur 6

eine Schutz- und Begrenzungsschaltung gemäß der Erfindung,

Figur 7 und Figur 8

Prinzipskizzen zur Erzeugung von Mittelspannungsimpulsen mittels Spulen,

Figur 9

eine selbstsichernde Konstruktion einer erfindungsgemäßen digitalen Schaltungsanordnung,

Figur 10

die Phasen der Absicherung der selbstsichernden Konstruktion nach Figur 10 und

Figur 11

eine Prinzipskizze eines erfindungsgemäßen Hardwaredurchgriffs.

Further advantages, features and details of the invention will become apparent from the following embodiments and from the drawings. Showing:

FIG. 1

an analog circuit with switch cleaning according to the prior art,

FIG. 2

a schematic diagram of a digitally controlled circuit arrangement according to the invention,

FIG. 3

a voltage wave train according to the invention on a firing capacitor during the spark,

FIG. 4

a schematic diagram of another digitally controlled circuit arrangement of the invention,

FIG. 5

a sketch of the voltage waveforms at three nodes of the circuit arrangement of FIG. 4 .

FIG. 6

a protection and limiting circuit according to the invention,

FIG. 7 and FIG. 8

Schematic diagrams for generating medium-voltage pulses by means of coils,

FIG. 9

a self-locking construction of a digital circuit arrangement according to the invention,

FIG. 10

the phases of protection of the self-locking construction FIG. 10 and

FIG. 11

a schematic diagram of a hardware handle according to the invention.

In the 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

In this analog circuit 1, however, there is a problem that the last spark occurs at an uncontrollable timing, whereby the probability of a misfire is comparatively high.

Since the analogue igniters have been largely replaced by microcontroller controlled detonators, therefore, only the two stopping concepts of the high voltage stop on one side and the low voltage stop on the other side are used for stopping. During low voltage stop, the stop connection is not cleaned, while the high voltage stop has the problem that touching the stop contact may result in an electric shock and therefore expensive insulation is required.

The FIG. 2 shows a schematic diagram of a digitally controlled Magnetündschaltungsanordnung 11 according to the invention. There, a voltage source 12 is initially provided, by means of which a firing capacitor 14 is charged via a diode 13. 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. By the switch 15, the nearest side or connected to the switch 15 electrode of the capacitor is pulled to ground. As a result, 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.

After the capacitor 14 has discharged, the magnetic field collapses and induces a voltage that is reversed in polarity. On the one hand, this voltage charges the capacitor 14, on the other hand it is conducted to the stop connection 18. In this way, 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.

Only the second, fourth and sixth half-wave of the ignition pulse train are used for the burnout of the stop switch or the stop terminal 18. The burn-out takes place only during the spark. About the resistor 21 b, the strength of the Freibrennimpulses for the stop connection to a certain point is freely adjustable. The circuits in the figure description are basic circuits and schematic diagrams. This means that circuit-specific details may be added in the concrete implementation or that some components and components may be replaced by comparable ones.

In the FIG. 3 For example, a voltage waveform 22 according to the invention is shown on a firing capacitor such as the capacitor 14 during sparking. In the illustration, 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.

In the FIG. 4 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. In some implementations, the microcontroller 41 may be part of the digitally controlled magneto ignition circuitry 40 according to the invention. 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. Thus, 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 Magnetzündschaltungsanordnung 40, the resistor 56th

Furthermore, 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. Thus, 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 line between the stop pin 42 of the microcontroller 41 is monitored by means of a self-locking construction. Of course, both the hardware handle and the self-locking construction, regardless of a medium voltage stop or the connection cleaning in appropriate circuits can be realized and so in turn may be the subject of further patent applications or divisional applications.

For the self-locking construction, the capacitor 55 must be positioned as close as possible to the stop connection 53. On the other hand, 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.

In the 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.

The 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. 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. In the combined protection and limiting circuit 62, 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.

The FIGS. 7 and 8th show schematic diagrams for the generation of medium voltage pulses by means of coils. In the FIG. 7 For example, a trigger coil 70 is shown on a metal core 71. On the other side of the metal core 71 is the charging coil 72. In addition, 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.

In the case of FIG. 7 with the separate medium-voltage coil 73 connects to this towards the stop terminal 79, a resistor 74 followed by a diode 75 at. About 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.

In the FIG. 8 showing the example of the combined coil, in which therefore 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. Thus, the charging coil 72 can fulfill two functions. Basically Of course, a coil other than the charging coil 72 may be used as a combined coil (also) for generating medium-voltage pulses.

The 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. As shown here, 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.

To verify the connection between the resistor 94 and the capacitor 93 two processes are required, which in the FIG. 10 as phases of protection of the self-locking construction 90 of the FIG. 9 are shown. In 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.

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. For flexible detection of high and low levels or states, a microcontroller 92 with analog / digital converter or with a comparator can be used. 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. These two functions can therefore be combined so that then a stop switch query in a digital circuit arrangement with self-locking construction part of the self-locking construction or the hedging would be.

The 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.

When the stop switch is depressed, the stop port 104 is grounded. Through the diode 102 between the resistor 106 and the diode 103 no greater voltage than, in this example, about 0.7 volts arise. However, this voltage is lost in about the diode 103, so that no voltage at the gate input of the thyristor 105 can build up and this never durchsteuert and thus no spark is output. In addition, as already in connection with, for example, the self-locking construction of Figures 9 and 10 For example, in hardware pass-through 100 for securing the connection of the microcontroller 101 and the stop terminal 104, a resistor 107 is provided close to the microcontroller 101 and a capacitor 108 is provided near the stop terminal 104. Of course, it is also possible to provide the hardware handle 100 regardless of a self-locking design or even independent of a medium voltage stop in digital circuitry. With a combination of these elements with a medium voltage stop, however, an optimal circuit and component protection can be achieved with particular advantage.

Reference number list

1

circuit

2

charging coil

3

Breaker coil

3b

Kitchen sink

4

metal core

5

trigger coil

6

thyristor

7

stop switch

8th

resistance

9

capacitor

10

diode

11

Magnetzündschaltungsanordnung

12

voltage source

13

diode

14

ignition capacitor

15

switch

16

primary coil

17

secondary coil

18

stop connection

19

ignition coil

20

high voltage

21

diode

21b

resistance

22

Voltage wave sequence

23

ordinate

24

abscissa

31

half-wave

32

half-wave

33

half-wave

34

half-wave

35

half-wave

36

half-wave

25

line

40

Magnetzündschaltungsanordnung

41

microcontroller

42

Stopppin

43

Ignition output

44

voltage source

45

diode

46

ignition capacitor

47

thyristor

K1

node

48

primary coil

49

ignition coil

50

secondary coil

51

High voltage secondary coil

K2

node

52

diode

53

stop connection

54

resistance

55

capacitor

57

diode

58

diode

59

decoupling resistor

60

resistance

K3

node

61

Zener diode

62

Protective and limiting circuit

63

circuit

64

circuit

65

microcontroller

66

stop connection

67

resistance

68

Zener diode

69

capacitor

70

trigger coil

71

metal core

72

charging coil

73

Medium voltage coil

74

resistance

75

diode

76

resistance

76a

Connection stop pin

77

Zener diode

78

capacitor

79

stop connection

80

stop switch

81

diode

90

self-locking construction

91

stop connection

92

microcontroller

93

capacitor

94

resistance

95

secured path

96

Phase 1

97

phase

98

line

99

line

100

Hardware penetration

101

microcontroller

102

diode

103

diode

104

stop connection

105

thyristor

106

resistance

107

resistance

108

capacitor

Claims (16)

Method for generating and applying at least one voltage pulse having a cleaning function for a stop switch (80) to a stop connection (18, 53, 66, 79, 91, 104) associated with the stop switch (80), which is connected to a digitally controlled magnetic ignition circuit (11, 40) of an electrical device, the magnetic ignition circuit arrangement (11, 40) generating a voltage wave sequence (22) over time with respect to its amplitude decreasing half-waves (31-36) and / or at least one voltage pulse in a medium voltage range, characterized that at a voltage wave sequence (22) at least one of the first half-wave (31) subsequent subsequent and thus having a smaller amplitude subsequent half wave (32-36) of the voltage wave sequence is applied as a voltage pulse to the stop terminal and / or that when generating at least one voltage pulse in a medium voltage range of one or more voltage pulses be applied to the stop port (18, 53, 66, 79, 91, 104) and thus exert a cleaning effect on the stop switch (80). Method according to Claim 1, characterized in that at least one half-wave of an ignition voltage wave sequence (22) generated by the magnetic ignition circuit arrangement (11) and / or at least one ignition voltage pulse generated by the magnetic ignition circuit arrangement (11, 40) is sent to the stop connection (18, 53) for cleaning , 66, 79, 91, 104) and / or that as a voltage wave sequence (22) decreasing in amplitude over time generates a voltage wave sequence (22) emanating from a high voltage and / or that by means of the stop connection (18, 53, 66 , 79, 91, 104), if necessary, a spark is switched off. Method according to one of the preceding claims, characterized in that every second half-wave (32, 34, 36) of the voltage wave sequence (32) and / or only medium voltage pulses (32, 34, 36) and / or non-electric shock half waves (32-36) of the voltage wave sequence and / or voltage pulses not leading to an electrical shock are applied to the stop connection (18, 53, 66, 79, 91, 104) and / or that at least one half-wave applied to the stop connection (18, 53, 66, 79, 91, 104) ( 32-36) and / or at least one applied voltage pulse exert a cleaning effect on the stop connection (18) by breaking and / or destroying an undesired oxide layer. Method according to one of the preceding claims, characterized in that the stop connection (18, 53, 66, 79, 91, 104) is preceded by a component which conducts current only in one direction, in particular a diode (21, 52), such that only certain half-waves (32-36) and / or voltage pulses are applied to the stop connection (18, 53, 66, 79, 91, 104), and / or that by means of the stop connection (18, 53, 66, 79, 91, 104 ) upstream resistor (21b, 54), the at least one to be applied to the stop connection (18, 53, 66, 79, 91, 104) half-wave (32-36) and / or the at least one voltage pulse in terms of voltage can be set. Method according to one of the preceding claims, characterized in that by means of a voltage limitation, in particular by using at least one capacitor (55, 69, 78, 93, 108) and / or at least one Zener diode (61, 68, 77), the voltage delimited at the stop connection (18, 53, 66, 79, 91, 104) and / or that a protective circuit of at least one pin of a microcontroller (41, 65, 92, 101) controlling the magnetic ignition circuit arrangement (11, 40) is realized. Method according to one of the preceding claims, characterized in that the proper connection between a Pin (42, 43) of the magnetic ignition circuit (11) controlling the microcontroller (41, 65, 92, 101) and the stop connection (18, 53, 66, 79, 91, 104) by means of a self-locking construction (90), in particular with a Capacitor (55, 69, 78, 93, 108) near the stop port and a resistor (60, 67, 94, 107) close to the microcontroller (41, 65, 92, 101), is checked. Method according to one of the preceding claims, characterized in that it is ensured by means of a, in particular by means of at least one diode (57, 58, 102, 103) realized, hardware handle (100) that when the stop switch (80) regardless of the activation of the Magnetündschaltungsanordnung (11, 40) by a microcontroller (41, 65, 92, 101) no spark is output. Method according to one of the preceding claims, characterized in that the voltage wave sequence (22) and / or the at least one voltage pulse through a coil (16, 48, 72, 73), in particular a coil (16, 48, 72, 73) with metal core (71) or iron core and / or one of a magnetic field of a pole wheel interspersed coil (16, 48, 72, 73) and / or the primary side of an ignition coil (19, 49) are generated. A digitally controlled magnetic ignition device (11, 40) of an electrical device having a stop connection (18, 53, 66, 79, 91, 104) associated with a stop switch (80), said magnetic ignition device (11, 40) for generating and applying at least one of a cleaning Effect for the stop switch (80) having voltage pulse to the stop connection (18, 53, 66, 79, 91, 104), in particular according to a method according to one of claims 1 to 8, is formed and wherein the magnetic ignition circuit arrangement (11, 40) for Generation of a voltage wave sequence (22) from halfwaves (31-36) decreasing with respect to their amplitude over time and / or generating at least one voltage pulse in a middle one Voltage range is formed, characterized in that the Magnetzündschaltungsanordnung (11, 40) at a decreasing with respect to their amplitude voltage wave sequence (22) for applying at least one of the first half-wave (31) temporally subsequent and thus having a smaller amplitude later half-wave (32 36) of the voltage wave train (32) as a voltage pulse to the stop connection (18, 53, 66, 79, 91, 104) and / or that the magnetic ignition circuit arrangement (11, 40) generates at least one voltage pulse in a medium voltage range for applying the or a plurality of voltage pulses to the stop connection (18, 53, 66, 79, 91, 104) is formed and thus exerts a cleaning effect on the stop switch (80). Digitally controlled magnetic ignition circuit arrangement (11, 40) according to Claim 9, characterized in that the magnetic ignition circuit arrangement (11, 40) is used to apply at least one half-wave to an ignition voltage wave sequence (22) generated by the magnetic ignition circuit arrangement (11, 40) and / or to apply at least one side the ignition magnetization pulse generated at the stop connection (18, 53, 66, 79, 91, 104) for cleaning and / or that the magneto ignition circuit arrangement (11, 40) emanating from the high voltage and above Time is formed with respect to its amplitude decreasing Spannungswellenfolge (22) and / or that the stop connection (18, 53, 66, 79, 91, 104) is designed for switching off a spark. Digitally controlled magneto ignition circuit arrangement (11, 40) according to any one of claims 9 or 10, characterized in that the magnetic ignition circuit arrangement (11, 40) for applying every second half-wave (32, 34, 36) of the voltage wave sequence (22) and / or only medium-voltage pulses (32-36) and / or non-electric shock half-waves (32-36) of the voltage wave sequence (22) and / or voltage pulses leading to an electric shock of the stop connection (18, 53, 66, 79, 91, 104) and / or that at least one of the stop connection (18, 53, 66, 79, 91, 104) applied half-wave (32-36) and / or at least one applied voltage pulse for cleaning the stop connection (18, 53, 66, 79, 91, 104) are formed by breaking and / or destroying an undesirable oxide layer. Digitally controlled magnetic ignition circuit arrangement (11, 40) according to one of Claims 9 to 11, characterized in that the stop connection (18, 53, 66, 79, 91, 104) is a component which conducts current in one direction only, in particular a diode (21, 52) is connected in such a way that only certain half-waves (32-36) and / or voltage pulses are applied to the stop connection (18, 53, 66, 79, 91, 104), and / or that the stop connection (18, 53, 66, 79, 91, 104) is preceded by a resistor (21 b, 54) via which the at least one to the stop connection (18, 53, 66, 79, 91, 104) to be applied half-wave (32-36) and / or the at least one voltage pulse can be set with regard to the voltage, and / or that the voltage at the stop connection (18, 53, 66, 79, 91, 104) can be limited by means of a voltage limitation. Digitally controlled magneto ignition circuit arrangement (11, 40) according to one of claims 9 to 12, characterized in that the proper connection between a pin (42, 43) of a microcontroller (41, 65, 92, 101) controlling the magnetic ignition circuit arrangement (11) and the Stop connection (18, 53, 66, 79, 91, 104) by means of a self-locking construction (90), in particular with a capacitor (55, 69, 78, 93, 108) close to the stop connection (18, 53, 66, 79, 91 , 104) and a resistor (60, 67, 94, 107) close to the microcontroller (41, 65, 92, 101), is verifiable. Digitally controlled magnetic ignition circuitry (11, 40) according to one of claims 9 to 13, characterized in that by means of a, in particular by means of at least one diode (57, 58, 102, 103) realized, hardware passage (100) is ensured that when the stop switch (80) regardless of the activation of the Magnetündschaltungsanordnung ( 11, 40) by a microcontroller no spark (41, 65, 92, 101) can be output. Digitally controlled magnetic ignition circuit arrangement (11, 40) according to one of Claims 9 to 14, characterized in that the magnetic ignition circuit arrangement (11, 40) has a coil (16, 48, 72, 73), in particular a coil (16, 48, 72, 73 ) with a metal core (71) or iron core and / or a coil (16, 48, 72, 73) penetrated by a magnetic field of a pole wheel and / or the primary side of an ignition coil (19, 49) for generating the voltage wave sequence (22) and / or the at least one voltage pulse. Manually handleable device having an internal combustion engine with a digitally controlled magnetic ignition circuit arrangement (11, 40), in particular with a digitally controlled magnetic ignition circuit arrangement according to one of Claims 9 to 15 and / or designed for carrying out a method according to one of Claims 1 to 8, and with one Stop switch (80) associated with the stop connection (18, 53, 66, 79, 91, 104), wherein the magnetic ignition circuit arrangement (11, 40) for generating and applying at least one cleaning effect for the stop switch (80) having voltage pulse to the stop connection (18 , 53, 66, 79, 91, 104), and wherein the magnetic ignition circuit arrangement (11, 40) generates a voltage wave sequence (22) from halfwaves (31-36) decreasing in amplitude over time and / or generating at least one Voltage pulse is formed in a medium voltage range, characterized in that the Magnetnetzschaltschalt arrangement (11, 40) with a voltage wave sequence (22), which decreases with respect to its amplitude over time, for Applying at least one of the first half-wave (31) temporally subsequent and thus having a smaller amplitude later half-wave (32-36) of the voltage wave sequence (32) as a voltage pulse to the stop connection (18, 53, 66, 79, 91, 104) and / or the magnetic ignition circuit arrangement (11, 40) is designed to generate at least one voltage pulse in a medium voltage range for application of the one or more voltage pulses to the stop connection (18, 53, 66, 79, 91, 104) and thus to have a cleaning effect on the stop switch (10). 80).

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