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A Feedback Controlled Carburetion System Using Air Bleeds

Carter Carburetor Div., ACF Industries, Inc.-T. R. Gantzert, D. L. Hicks, M. A. Jefferis
Published 1977-02-01 by SAE International in United States
A feedback controlled carburetion system has been developed that maintains a flow of exhaust gases of uniform composition. This is a requirement if three-way or dual bed catalytic converters are to be used in meeting projected emission standards. Exhaust gas uniformity depends upon delivery of a constant air-fuel ratio by the carburetor. Instead of metering fuel directly, Carter Carburetor finds that precise and responsive control of the air-fuel ratio is obtained by using variable air bleeds in the carburetor fuel circuits.
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An Approach to Altitude Compensation of the Carburetor

Carter Carburetor Div., ACF Industries, Inc.-Richard C. Wrausmann, Robert J. Smith
Published 1976-02-01 by SAE International in United States
Carburetion and a number of other engine functions dependent on manifold vacuum are adversely affected at higher altitudes. This paper presents various approaches to compensate for this effect, discusses the rationale leading to the variable air bleed approach chosen by Carter Carburetor Division and reviews the significant features of the compensating device as developed.
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Process and Control for Producing Anti-Emission Carburetors

Carter Carburetor Div., ACF Industries, Inc.-James E. Eberhardt, John A. Beck
Published 1969-02-01 by SAE International in United States
The advent of emission controls for automobiles in California in 1966 triggered a period of expansion in carburetion technology. The industry's design and application engineers have been diligently developing carburetors that satisfy the early California and the 1968 nation-wide emission limits while maintaining performance characteristics. The present paper explains the need for improved carburetor uniformity; describes a program currently in operation to achieve uniformity; and illustrates process changes being generated as a result of the program.
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Antismog Carburetor Hardware and Test Equipment

Carter Carburetor Div., ACF Industries, Inc.-Forrest W. Cook
Published 1966-02-01 by SAE International in United States
Control of exhaust emissions from the automobile engine has added many requirements to those normally established for the manufacture and performance of the carburetor.This report covers the carburetor work performed in meeting these new requirements of the automobile manufacturers employing engine modification, air injection, or a combination of both methods, for controlling exhaust emissions.
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Gasoline Cleanliness Requirements for Carburetors

Carter Carburetor Div., ACF Industries, Inc.-John F. Combest
Published 1962-01-01 by SAE International in United States
The effect of various gasoline contaminants on carburetor operation is explained and results of accelerating pump and metering jet wear tests are given. A novel laboratory test method for determining a “flooding index” is presented. To insure proper carburetor operation gasoline should be free of gum, gels, and water. Flooding, rather than wear or blocking, is usually the factor which limits the maximum allowable fuel contamination entering the carburetor.
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