Internal Combustion engine control.

摘要

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 18, 19 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 controlled system. The invention also resides in apparatus for monitoring combustion in accordance with the above method.