초록 ▼

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 fi

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.

대표청구항 ▼

A method of monitoring combustion within a cylinder of a reciprocating piston internal combustion engine comprising deriving first and second intensity signals representative of light intensity within the cylinder by means of first and second optical transducers of spaced spectral response, said fir

A method of monitoring combustion within a cylinder of a reciprocating piston internal combustion engine comprising deriving first and second intensity 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, establishing a ratio signal representing the ratio of said first and second intensity signals and having a fast rising leading edge, and using said fast rising leading edge of said ratio signal as, or to obtain, a control parameter for controlling at least one engine function by an engine control system. A method of monitoring the oxides of nitrogen (NOx) content of the exhaust of a reciprocating piston internal combustion engine including monitoring light intensity within the cylinder, 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.