Abstract: An exhaust extractor is disclosed in which a curvate path is provided for installation in the exhaust system of a vehicle and has an external chamber for receiving extracted fuel constituents of the exhaust for supply to the intake of the vehicle engine while precluding re-ingestion of undesirable particulate and pollutant matter. A main duct carries a plurality of inwardly-directed transfer scoops for interception and transfer of usable particulates and other fractions of the exhaust into the external chamber at selected portions of the periphery of the main duct away from the outer portion of the curvate path therein to minimize the transfer of heavy particulates or solids to the external chamber and the remainder of the exhaust recycle system.

Abstract: A fuel/air and recycled-exhaust mixer is disclosed which is devoid of valves or interruptions in the exhaust-recycle path and which is effective with multi-barrel and multi-stage carburetors, either as original equipment for new vehicles or as a conversion unit for existing vehicles.