Combustion monitoring

Internal-combustion engines – Combustion chamber means combined with air-fuel mixture...

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123435, 123494, 73 35, 73116, G01M 1500, F02D 4114, F02P 5145

Patent

active

049190997

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.

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patent: 4444043 (1984-04-01), Hattori et al.
patent: 4463733 (1984-08-01), Tsai
patent: 4658642 (1987-04-01), Ikeda
patent: 4799455 (1988-10-01), Kuroiwa et al.

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