The Measurement of Fuel-air Ratio by Analysis of the Oxidized Exhaust Gas

Memm, J. Lawrence, Jr.

An investigation was made to determine a method of measuring fuel-air ratio that could be used for test purposes in flight and for checking conventional equipment in the laboratory. Two single-cylinder test engines equipped with typical commercial engine cylinders were used. The fuel-air ratio of the mixture delivered to the engines was determined by direct measurement of the quantity of air and of fuel supplied and also by analysis of the oxidized exhaust gas and of the normal exhaust gas. Five fuels were used: gasoline that complied with Army-Navy Fuel Specification, No. AN-VV-F-781 and four mixtures of this gasoline with toluene, benzene, and xylene. The method of determining the fuel-air ratio described in this report involves the measurement of the carbon-dioxide content of the oxidized exhaust gas and the use of graphs or the presented equation. This method is considered useful in aircraft, in the field, or in the laboratory for a range of fuel-air ratios from 0.047 to 0.124

Document ID

19930093110

Acquisition Source

Legacy CDMS

Document Type

Other - NACA Wartime Report

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Date Acquired

September 6, 2013

Publication Date

October 1, 1943

Subject Category

Report/Patent Number

Accession Number

93R22400

Distribution Limits

Public

Work of the US Gov. Public Use Permitted.

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