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Improved In-Cylinder Local CAD-Resolved Equivalence Ratio Measurement Probe for SI Engines
Technical Paper
2003-01-1108
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A new tool able to deliver the local in-cylinder equivalence air fuel ratio with high temporal CA resolution is presented for SI engines. Although non-intrusive laser techniques have considerable advantages, they are inappropriate for series engines application and other measurement techniques do not have a fast enough time response. The probe presented fullfills the demand for fast local air-fuel ratio measurement with a simpler device than fast FID. Mounted at the spark plug location, it allows a completely normal running of the engine as it is integrated in a spark plug. The probe is based on hot wire anemometry technique involving catalytic oxidation of hydrocarbons on the wire. A parametric study giving the major characteristics of the measurement sensitivity, confidence, response time and some applications of the probe to in-cylinder engine measurements are presented which confirm the ability of the technique to characterize, quantitatively, the homogeneity or in-homogeneity of air-fuel mixture, especially during the compression stroke with a CA resolution.
Authors
Citation
Guibert, P., Boutar, Z., and Le Moyne, L., "Improved In-Cylinder Local CAD-Resolved Equivalence Ratio Measurement Probe for SI Engines," SAE Technical Paper 2003-01-1108, 2003, https://doi.org/10.4271/2003-01-1108.Also In
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