Method of and apparatus for exhausting internal combustion engines
AssigneeNG1 Technologies, LLC
InventorsDustin Nord, Cynthia O'Donnell, Thomas Shirra
Life of this patent
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Abstract
Disclosed herein is a method and an insert device for an internal combustion engine including: a central exhaust passage; a first expansion chamber in an upstream portion of the exhaust system and in fluidic communication with the central exhaust passage; a second expansion chamber in a downstream portion of the exhaust system and in fluidic communication with the central exhaust passage and the first expansion chamber, forming a continuous expansion chamber throughout a length of the insert device.
Claims18
An insert device for retrofitting into an exhaust system pipe of an internal combustion engine, the insert device comprising:
- a perforated inner pipe having a first end and a second end, the first and the second ends sized with each of the first and the second end outer diameter to be fit within an inner diameter of the exhaust system pipe to secure the first and second ends respectively;
- the inner pipe is positioned as an inner pipe exhaust passage for directing flow of exhaust gases from the engine along an axis of the inner pipe exhaust passage,
- wherein the inner pipe along at least a portion of its length between the first and second ends, exhibits an outer diameter less than the inner diameter of the existing exhaust system pipe forming an annular expansion chamber between the inner pipe and the exhaust system pipe;
- and
- one or more vanes extending over at least a portion of the length of the inner pipe and formed into a spiral, turning around the circumference of the inner pipe, and with a first edge mounted to an internal face of the inner pipe, and a second edge spaced inwardly from and substantially coaxial with the internal face, said one or more vanes being of substantially constant width and being disposed in angular relationship to the axis of the inner pipe, and configured to impart a circular, torsional component to at least a portion of exhaust gases while passing through the insert device, with the proviso that a configuration of vanes does not completely restrict or obstruct the flow of said exhaust gases.
An insert device for retrofitting into an existing exhaust system pipe of an internal combustion engine, the insert device comprising:
- a perforated pipe axially positioned within an existing exhaust system pipe and having a first end and a second end, the first and the second ends being expanded or attached to a connector in order to meet a diameter of the existing exhaust system pipe to secure the perforated pipe in place;
- the perforated pipe is positioned as an inner pipe exhaust passage operable to direct the flow of exhaust gases from the engine along an axis of the inner pipe exhaust passage;
- one or more vanes extending substantially the length of the perforated pipe and formed into a spiral, turning around the circumference of the perforated pipe, and with a first edge mounted to an internal face of the perforated pipe and the existing exhaust system pipe, and a second edge spaced inwardly from and substantially coaxial with the internal face, said one or more vanes being of substantially constant width and being disposed in angular relationship to the axis of the perforated pipe, and configured to impart a circular, torsional component to at least a portion of exhaust gases passing through the insert device, with the proviso that a configuration of vanes does not completely restrict or obstruct the flow of said exhaust gases.
Dependencies are inferred from the claim text.