Multicharge ignition system having secondary current feedback to trigger start of recharge event
August 10, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesIgnition system with repetitive sparks Ignition system for internal combustion engines Electronic ignition system for internal combustion engines and method for controlling the system Apparatus for detecting condition of burning in internal combustion engine Ignition system and principle of operation Multicharge implementation to maximize rate of energy delivery to a spark plug gap Patent #: 6186130 InventorsAssigneeApplicationNo. 637089 filed on 08/10/2000US Classes:123/625, Responsive to engine or environmental condition123/637, System fires single spark plug per cylinder123/644Current or voltage sensing in coil primaryExaminersPrimary: Argenbright, Tony M.Attorney, Agent or FirmInternational ClassesF02P 003/05F02P 005/15 AbstractAn ignition system for an internal combustion engine includes an ignition coil coupled to a spark plug in a combustion chamber of the engine, and a switch responsive to an ignition control signal for causing a primary current to flow through a primary winding (16) of the ignition coil. A control circuit is configured to generate the ignition control signal so as to produce a plurality of sparks at the spark plug during a combustion event in the cylinder. A secondary current trip circuit in sensing relation to the secondary winding is configured to generate secondary current trip signal when the secondary current decays down past a secondary current trip threshold. The control circuit is further configured to trigger a recharge event of the multicharge operation in response to the secondary current trip signal, thereby minimizing variability in terms of the amount of energy delivered to the combustion chamber. | |
