This paper presents a unique approach to fuel management systems applicable to spark-ignition engines and discusses a fluidic implementation. The air-modulation system is opposite from conventional systems in that the driver selects the air consumption to the engine thereby providing many desirable functions that are inherent in its operation. Fluidic control was selected for its sensing and control compatibility with the fluid variables and for its cost and reliability potential. The design and bench tests of the fluidic controller are discussed. The results of the dynamometer and vehicle evaluation are encouraging.

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