Internal combustion engine ignition device and igniter for same
US6814066B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 2004 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Apr 6, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P3/0435
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine ignition device able to suppress misfires etc. at abnormal times and achieving smaller size and lower cost, provided with an IGBT (switching device SW), a current limiting circuit for limiting a primary current running through the IGBT to within a predetermined value, a fast gate voltage drop circuit for making the gate voltage of the IGBT fast drop to an extent where spark discharge occurs at the spark plug, an abnormality detecting circuit for detecting an abnormal state of an igniter or electronic control unit and outputting an abnormality detection signal, and a slow gate voltage drop circuit having a gate voltage feed cutoff circuit for cutting off the feed of the gate voltage at an abnormal time and a discharge circuit for discharging the gate capacitor charge of the IGBT to make the gate voltage slowly drop to an extent where no spark discharge will occur at the spark plug.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.