Patent
Ignition device
| العنوان: | Ignition device |
|---|---|
| Patent Number: | 7,506,641 |
| تاريخ النشر: | March 24, 2009 |
| Appl. No: | 11/523020 |
| Application Filed: | September 19, 2006 |
| مستخلص: | A first series circuit having an energy storage coil 21, a first diode 3, and a capacitor 6 connected between a direct current power supply E and a ground terminal GND is arranged. A second series circuit of a switching element 5 and an ignition coil 4 is connected to both ends of the capacitor 6. The switching element 5 of the ignition device configured as above is controlled so as to perform a plurality of ON/OFF operations in time of the ignition operation of the ignition plug 8 connected to the secondary side of the ignition coil 4. As a result, the capacitive discharge and the inductive discharge are alternately repeated at the ignition plug 8. According to the present invention, a multiple discharge type ignition device in which the number of components is reduced, and the power consumption is suppressed is realized. |
| Inventors: | Ishida, Yoshio (Osaka, JP) |
| Assignees: | Diamond Electric Mfg. Co., Ltd. (Osaka, JP) |
| Claim: | 1. An ignition device configured to ignite an ignition plug, comprising: a direct current power supply connection; a ground terminal connection; a damper element; a first circuit connected between the direct current power supply connection and the ground terminal connection, the first circuit including a backflow prevention element, an energy storage coil, and a capacitor connected in series, the capacitor connected in parallel to the damper element; a second circuit connected at both ends of the capacitor, the second circuit including a switching element and an ignition coil connected in series, the ignition coil having a primary and secondary side, the secondary side connected to the ignition plug; and a current detector configured to detect a value of a current of the energy storage coil or the switching element, wherein the switching element is configured to controllably perform a plurality of ON and OFF operations of the ignition device during an ignition operation of the ignition plug, the plurality of ON and OFF operations including a plurality of discharging operations in which a discharge direction through the secondary side repeatedly reverses, including an ON operation where current simultaneously flows from the energy storage coil and the capacitor to the primary side, and the current detector is configured to turn off the ignition device if the value of the current detected reaches a predetermined upper limit value. |
| Claim: | 2. The ignition device according to claim 1 , wherein a plurality of the second circuit are connected commonly to both ends of the capacitor. |
| Claim: | 3. The ignition device according to claim 1 , wherein the switching element is configured to change a number of switches between ON and OFF operations of the plurality of ON and OFF operations according to a rotation number or a load condition of an internal combustion device driven by the ignition plug, or a level of the power supply voltage. |
| Claim: | 4. The ignition device according to claim 1 , wherein the ignition device is configured to dynamically change a parameter of an ON operation of the plurality of ON and OFF operations according to a rotation number or a load condition of an internal combustion device driven by the ignition plug, or a level of the power supply voltage. |
| Claim: | 5. The ignition device according to claim 4 , wherein the parameter is an operation time of a first ON operation of the plurality of ON and OFF operations. |
| Claim: | 6. The ignition device according to claim 4 , wherein the parameter is an operation time of a last ON operation the plurality of ON and OFF operations. |
| Claim: | 7. The ignition device according to claim 1 , wherein a last ON operation time of the plurality of ON and OFF operations is longer than previous ON operation times. |
| Claim: | 8. The ignition device according to claim 1 , further comprising: a magnetic circuit operatively connected to the energy storage coil and including a magnet having a polarity opposite to a magnetic flux direction of the energy storage coil during conduction period. |
| Claim: | 9. The ignition device according to claim 1 , further comprising: a current detection coil, the current detection coil being a part of the energy storage coil or being an auxiliary coil electromagnetically coupled to the energy storage coil. |
| Claim: | 10. The ignition device according to claim 1 , wherein the predetermined upper limit value includes a first predetermined upper limit value and a second predetermined upper limit value, the second predetermined upper limit value associated with a final ON operation of the plurality of ON/OFF operations and being higher than the first predetermined upper limit value. |
| Claim: | 11. The ignition device according to claim 8 , wherein the magnetic circuit is formed into an annular shape, and the magnet is arranged in a slit formed in the middle. |
| Claim: | 12. The ignition device according to claim 8 , wherein the magnetic circuit is configured by a magnetic body of linear rod shape, and the magnet is arranged at least one location of substantially the central part or both ends of the rod shaped magnetic body. |
| Claim: | 13. The ignition device according to claim 12 , further comprising: a magnetic body strip having lower magnetism than the magnet, the magnetic body strip arranged in continuation from the magnet to at least one end of the rod shaped magnetic body. |
| Claim: | 14. An ignition device configured to ignite an ignition plug and including a direct current power supply connection, a ground terminal connection, and an ignition coil having a primary and secondary side, the ignition device comprising: means for controllably performing a plurality of ON and OFF operations of the ignition device during an ignition operation of the ignition plug, the plurality of ON and OFF operations including a plurality of discharging operations in which a discharge direction through the secondary side repeatedly reverses, and means for turning off the ignition device if a detected current reaches a predetermined upper limit value. |
| Current U.S. Class: | 123/618 |
| Patent References Cited: | 4099509 July 1978 Hashimoto 5056496 October 1991 Morino et al. 6052002 April 2000 Kinge 6305365 October 2001 Maeoka et al. 7100589 September 2006 Toriyama 2002/0066444 June 2002 Ikeda et al. 2005/0263144 December 2005 Toriyama 3-15659 January 1991 2811781 August 1998 11-210607 August 1999 |
| Primary Examiner: | Gimie, Mahmoud |
| Attorney, Agent or Firm: | Birch, Stewart, Kolasch & Birch, LLP |
| رقم الانضمام: | edspgr.07506641 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |