Ignition systems for internal combustion engines
US4130097A · kind A · utility
Inventor
Key dates
| Filing date | Oct 17, 1977 |
| Grant date | Dec 19, 1978 |
| Priority date | — |
| Expiry date | Oct 17, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A closed loop electronic ignition system for internal combustion engines, in which a comparison is made between a signal derived from a fixed predetermined crank-shaft angle, and a signal derived from a predetermined point on the pressure rise curve after the commencement of the second stage of combustion within a cylinder of the engine, and if non-coincidence is detected between the two signals, the ignition timing is either advanced or retarded so as to maintain coincidence between the signals, so that the second stage of combustion always occurs at the fixed predetermined crank angle, the spark then being extinguished by switching the ignition coil "on" at this predetermined crank-shaft angle, irrespective of the speed and load on the engine, as well as all other parameters which can affect the ignition timing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.