Internal combustion engine spark scheduling
US6012427A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 1998 |
| Grant date | Jan 11, 2000 |
| Priority date | — |
| Expiry date | May 29, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P7/0775
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to apparatus for scheduling the ignition sparks for a spark ignition internal combustion engine. An ignition system for a spark ignition engine, includes a device for generating a series of pulses (12) upon each revolution of a crankshaft (1) and a device (8,118) for identifying pulses in the series relative to a top dead center position (TDC) for the engine, one or more ignition coils and a device to charge a coil and then to discharge the coil to generate an ignition spark at a desired spark angle (54) relative to the top dead center position (TDC). The ignition system identifies a first particular pulse (60) occurring after the charging starts and before the discharging begins, and calculates a first interval (I.sub.D) from the first particular pulse (60) so that the discharging happens proximate the desired spark angle (54).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.