Air-fuel ratio measurement apparatus and method therefor

Details Air-fuel ratio measurement apparatus and method therefor Air-fuel ratio measurement apparatus and method therefor

1992-08-03

1994-02-15

Myracle, Jerry W.

Measuring and testing

Gas analysis

Gas of combustion

73116, 250339, G01N 3112

Patent

active

052856763

ABSTRACT:
An apparatus, and corresponding method, for directly measuring air-fuel ratio of a combustion process, in an internal combustion engine is described. The apparatus includes a first electromagnetic wave sensor (105) that provides a first signal (107), representative of light intensity emitted at a first wavelength, and a second electromagnetic wave sensor (115) that provides a second signal (117), representative of light intensity emitted at a second wavelength. A ratio circuit (111, 121, 125) combines an integral of the first signal (107), and an integral of the second signal (117), and provides an air-fuel ratio signal, (127) indicative of the air-fuel ratio during the combustion process.

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