초록 ▼

An Ignition device for an internal combustion engine including a control device and an ignition coil which is feedable on its primary side by a voltage supply unit. The control device is provided to interrupt or reduce the voltage impressed on the primary side of the ignition coil when a magnitude o

An Ignition device for an internal combustion engine including a control device and an ignition coil which is feedable on its primary side by a voltage supply unit. The control device is provided to interrupt or reduce the voltage impressed on the primary side of the ignition coil when a magnitude of a magnetic induction B on the primary side of the ignition coil is greater than a predeterminable maximum value.

대표청구항 ▼

The invention claimed is: 1. A high voltage capacitor discharge ignition device for an internal combustion engine comprising: a control device; a voltage supply unit; an ignition coil which is feedable on a primary side by the voltage supply unit; a capacitor connected in parallel to the voltage su

The invention claimed is: 1. A high voltage capacitor discharge ignition device for an internal combustion engine comprising: a control device; a voltage supply unit; an ignition coil which is feedable on a primary side by the voltage supply unit; a capacitor connected in parallel to the voltage supply unit; and a secondary current measuring device for measuring of the secondary side current the secondary current measuring device being connected to the control device and arranged on a secondary side of the ignition coil wherein the control device is provided to interrupt or reduce the voltage impressed on the primary side of the ignition coil when a magnitude of a magnetic induction B on the primary side of the ignition coil is greater than a predeterminable maximum value and when the secondary current measured by the secondary current measuring device reaches a set value. 2. The high voltage capacitor discharge ignition device according to claim 1, wherein the predeterminable maximum value of the magnitude of the magnetic induction is a maximum limit of an operating range in which there is an at least approximately linear interrelationship between the magnitude of the magnetic induction and a primary side current. 3. The high voltage capacitor discharge ignition device according to claim 1, wherein the predeterminable maximum value of the magnitude of the magnetic induction is below the saturated range of the ignition coil. 4. The high voltage capacitor discharge ignition device according to claim 1, wherein the control device indirectly determines the magnitude of the magnetic induction on the primary side of the ignition coil via an evaluation of a duration of activated time(s) and deactivated time(s), wherein during activated time(s) the voltage of the voltage supply unit is impressed on the primary side of the ignition coil and during deactivated time(s) the voltage of the voltage supply unit is not impressed on the primary side of the ignition coil. 5. The high voltage capacitor discharge ignition device according to claim 4, wherein the maximum value is a predeterminable time span and said control device compares said time span to the total of activated times less the total of deactivated times. 6. The high voltage capacitor discharge ignition device according to claim 5, wherein said control device compares said time span to the total of activated times from the beginning of the ignition process, less the total of deactivated times from the beginning of the ignition process. 7. The high voltage capacitor discharge ignition device according to claim 1, wherein the ignition device comprises a primary current measuring device and the control device indirectly determines the magnitude of the magnetic induction on the primary side of the ignition coil via an evaluation of the primary side current. 8. The high voltage capacitor discharge ignition device according to claim 7, wherein the maximum value is a predeterminable maximum current value and the control device compares this to the value of the primary side current. 9. The high voltage capacitor discharge ignition device according to claim 1, wherein subsequent to an interruption or reduction of the voltage impressed on the primary side of the ignition coil the control device admits or initiates a re-activation or, respectively, an increase of the voltage only when the value of the magnetic induction on the primary side of the ignition coil falls below the predeterminable maximum value or a predeterminable re-activation target value. 10. The high voltage capacitor discharge ignition device according to claim 1, wherein said secondary current measuring device is provided for measuring the course of the secondary side current. 11. The high voltage capacitor discharge ignition device according to claim 9, wherein subsequent to an interruption or reduction of the voltage impressed on the primary side of the ignition coil the control device admits a re-activation or, respectively, an increase of the primary side voltage only when a polarity of the secondary side current changes. 12. The high voltage capacitor discharge ignition device according to claim 1, wherein the control device regulates the primary side voltage or the primary side current at least temporarily in dependence on a course of the secondary side current measured by the secondary current measuring device arranged on the secondary side of the ignition coil. 13. The high voltage capacitor discharge ignition device according to claim 1, wherein the control device regulates the primary side voltage and the primary side current at least temporarily in dependence on a course of the secondary side current measured by the secondary current measuring device arranged on the secondary side of the ignition coil. 14. The high voltage capacitor discharge ignition device according to claim 12, wherein subsequent to an interruption of the primary side voltage or current supply of the ignition coil during an ignition process or subsequent to the drop of the primary side voltage or the primary side current in the ignition coil below a predeterminable threshold during the ignition process, the control device energizes or regulates the primary side voltage or current supply of the ignition coil above the predeterminable threshold only when the secondary side current induced thereby acts in the direction of the predetermined course of the secondary side current. 15. The high voltage capacitor discharge ignition device according to claim 13, wherein subsequent to an interruption of the primary side voltage and current supply of the ignition coil during an ignition process or subsequent to the drop of the primary side voltage and the primary side current in the ignition coil below a predeterminable threshold during the ignition process, the control device energizes or regulates the primary side voltage and current supply of the ignition coil above the predeterminable threshold only when the secondary side current induced thereby acts in the direction of the predetermined course of the secondary side current. 16. The high voltage capacitor discharge ignition device according to claim 12, wherein subsequent to an interruption of the primary side voltage or current supply of the ignition coil during an ignition process or subsequent to the drop of the primary side voltage and/or the primary side current in the ignition coil below a predeterminable threshold during the ignition process, the control device energizes or regulates the primary side voltage or current supply of the ignition coil above the predeterminable threshold only when the secondary side current induced thereby acts in the direction of the instantaneously predetermined course of the secondary side current. 17. The high voltage capacitor discharge ignition device according to claim 13, wherein subsequent to an interruption of the primary side voltage and current supply of the ignition coil during an ignition process or subsequent to the drop of the primary side voltage and/or the primary side current in the ignition coil below a predeterminable threshold during the ignition process, the control device energizes or regulates the primary side voltage and current supply of the ignition coil above the predeterminable threshold only when the secondary side current induced thereby acts in the direction of the instantaneously predetermined course of the secondary side current. 18. The high voltage capacitor discharge ignition device according to claim 14, wherein the control device energizes or regulates the primary side voltage or current supply of the ignition coil above the predeterminable threshold after a change in polarity or, respectively, a zero-crossing of the secondary side current. 19. The high voltage capacitor discharge ignition device according to claim 15, wherein the control device energizes or regulates the primary side voltage and current supply of the ignition coil above the predeterminable threshold after a change in polarity or, respectively, a zero-crossing of the secondary side current. 20. The high voltage capacitor discharge ignition device according to claim 18, wherein the control device energizes or regulates the primary side voltage or current supply of the ignition coil above the predeterminable level after a presettable delay of time subsequent to a change in polarity or, respectively, a zero-crossing of the secondary side current. 21. The high voltage capacitor discharge ignition device according to claim 19, wherein the control device energizes or regulates the primary side voltage and current supply of the ignition coil above the predeterminable level after a presettable delay of time subsequent to a change in polarity or, respectively, a zero-crossing of the secondary side current. 22. The high voltage capacitor discharge ignition device according to claim 18, wherein the control device energizes or regulates the primary side voltage or current supply of the ignition coil above the predeterminable level instantaneously after a presettable delay of time subsequent to a change in polarity or, respectively, a zero-crossing of the secondary side current. 23. The high voltage capacitor discharge ignition device according to claim 19, wherein the control device energizes or regulates the primary side voltage and current supply of the ignition coil above the predeterminable level instantaneously after a presettable delay of time subsequent to a change in polarity or, respectively, a zero-crossing of the secondary side current. 24. The high voltage capacitor discharge ignition device according to claim 20, wherein the presettable delay of time essentially corresponds to a quarter of the eigen-period of the secondary side of the ignition device. 25. The high voltage capacitor discharge ignition device according to claim 14, wherein, on activation of the ignition device at the beginning of an ignition process or subsequent to an interruption of the primary side voltage or current supply of the ignition coil or subsequent to a drop of the primary side voltage or of the primary side current in the ignition coil below a predeterminable level during an ignition process, the control device provides an activation time interval during which the voltage of the voltage supply unit is permanently impressed on the primary side of the ignition coil in full intensity or for a predeterminable time span. 26. The high voltage capacitor discharge ignition device according to claim 15, wherein, on activation of the ignition device at the beginning of an ignition process and subsequent to an interruption of the primary side voltage and current supply of the ignition coil or subsequent to a drop of the primary side voltage and of the primary side current in the ignition coil below a predeterminable level during an ignition process, the control device provides an activation time interval during which the voltage of the voltage supply unit is permanently impressed on the primary side of the ignition coil in full intensity and for a predeterminable time span. 27. The high voltage capacitor discharge ignition device according to claim 25, wherein during the activation time interval the control device monitors the secondary side current via the secondary current measuring device or a secondary side voltage emitted by the ignition coil via a secondary voltage measuring device and interrupts the primary side voltage supply of the ignition coil when the secondary side current or the secondary side voltage emitted by the ignition coil exceeds (a) predeterminable limit value(s). 28. The high voltage capacitor discharge ignition device according to claim 26, wherein during the activation time interval the control device monitors the secondary side current via the secondary current measuring device and a secondary side voltage emitted by the ignition coil via a secondary voltage measuring device and interrupts the primary side voltage supply of the ignition coil when the secondary side current and the secondary side voltage emitted by the ignition coil exceeds (a) predeterminable limit value(s). 29. The high voltage capacitor discharge ignition device according to claim 25, wherein the control device regulates the primary side voltage or the primary side current in dependence on the course of the secondary side current only subsequently to the activation time interval. 30. The high voltage capacitor discharge ignition device according to claim 26, wherein the control device regulates the primary side voltage and the primary side current in dependence on the course of the secondary side current only subsequently to the activation time interval. 31. The high voltage capacitor discharge ignition device according to claim 1, wherein the voltage supply unit comprises at least one direct current supply unit and at least one capacitor which is in parallel connection thereto. 32. The high voltage capacitor discharge ignition device according to claim 31, wherein said direct current supply unit is a DC-DC-converter. 33. The high voltage capacitor discharge ignition device according to claim 1, wherein a switch triggered by the control device is provided on the primary side of the ignition coil, the switch having at least one first status in which the voltage of the voltage supply unit is impressed on the ignition coil and at least a second status in which the voltage of the voltage supply unit is not impressed on the ignition coil. 34. The high voltage capacitor discharge ignition device according to claim 1, wherein, by means of the secondary current measuring device, the control device analyses the course of the secondary side current with regard to its polarity or its magnitude. 35. The high voltage capacitor discharge ignition device according to claim 1, wherein, by means of the secondary current measuring device, the control device analyses the course of the secondary side current with regard to its polarity and its magnitude. 36. The high voltage capacitor discharge ignition device according to claim 1, wherein, by means of the secondary current measuring device, the control device analyses whether the magnitude of the secondary side current is greater than or equal to a predeterminable minimum value or not. 37. The high voltage capacitor discharge ignition device according to claim 1, wherein said internal combustion engine is a gas engine.