Combustion monitoring
US4919099A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1988 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | Mar 14, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D35/028
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of monitoring combustion within a cylinder of a reciprocating piston internal combustion engine comprising deriving first and second electrical signals representative of light intensity within the cylinder by means of first and second optical transducers of spaced spectral response, said first and second optical transducers observing the combustion event at a common location, or at closely adjacent locations, and, establishing a signal representing the ratio of said first and second electrical signals, said ratio signal being used as, or to obtain, a control parameter for an engine control system. The invention also resides in apparatus for monitoring combustion in accordance with the above method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.