Ignition control system with circulating-current control
US10975827B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2019 |
| Grant date | Apr 13, 2021 |
| Priority date | — |
| Expiry date | Feb 12, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/156
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In an implementation, a method of operating an ignition circuit can include enabling a charge path control circuit and a switch circuit to charge a primary winding of an ignition coil of the ignition circuit until a threshold current is reached in the primary winding. After reaching the threshold current in the primary winding, the method can include maintaining a current in the primary winding of the ignition coil in correspondence with a current limit by alternatively activating and deactivating the charge path control circuit complementary to alternative activation and deactivation of a circulating-current path control circuit. During the maintaining the current in the primary winding, the method can include initiating a spark in a spark plug included in the ignition circuit, the initiating the spark including controlling an amount of energy delivered from the primary winding to a secondary winding of the ignition coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.