Lobed exhaust diffuser apparatus, system, and method
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01N-003/021
F01N-007/08
F01N-007/20
F01N-007/00
출원번호
US-0333656
(2006-01-17)
등록번호
US-7316109
(2008-01-08)
발명자
/ 주소
Clerc,James C.
Cramer,James A.
Dixon,J. David
Ntone,Francois
Klein,Patrick M.
출원인 / 주소
Fleetguard, Inc
대리인 / 주소
Kunzler & McKenzie
인용정보
피인용 횟수 :
10인용 특허 :
14
초록▼
A lobed exhaust diffuser apparatus, system, and method configured to cool exhaust gases from an internal combustion engine comprises a diffuser having a proximal end, configured to receive exhaust gases from the engine, and a distal end, configured to expel the exhaust gases into the atmosphere. A p
A lobed exhaust diffuser apparatus, system, and method configured to cool exhaust gases from an internal combustion engine comprises a diffuser having a proximal end, configured to receive exhaust gases from the engine, and a distal end, configured to expel the exhaust gases into the atmosphere. A plurality of lobes are disposed on the distal end such that at least a portion of the exhaust gases pass through the lobes, increasing the interaction surface area between the exhaust gases and the atmosphere, allowing for more rapid diffusion and entrainment between exhaust gases and atmospheric gases, resulting in more rapid cooling of the exhaust gases.
대표청구항▼
What is claimed is: 1. An apparatus for cooling exhaust gases from an internal combustion engine, the apparatus comprising: a diffuser having a proximal end and a distal end, the proximal end configured to receive exhaust gases from the engine, and the distal end configured to expel the exhaust gas
What is claimed is: 1. An apparatus for cooling exhaust gases from an internal combustion engine, the apparatus comprising: a diffuser having a proximal end and a distal end, the proximal end configured to receive exhaust gases from the engine, and the distal end configured to expel the exhaust gases into the atmosphere; a plurality of lobes disposed at least partially on the distal end, the lobes configured such that at least a portion of the exhaust gases passes through the lobes; wherein the lobes are longitudinally tapered, becoming larger as they approach the distal end from the proximal end; and wherein the cross-sectional area of the distal end is approximately equal to the cross-sectional area of the proximal end. 2. The apparatus of claim 1, wherein the circumference of the distal end is greater than the circumference of the proximal end. 3. The apparatus of claim 1, wherein the lobes are disposed in a substantially annular pattern, defining an internal space, and further comprising a block disposed in the internal space, the block configured to at least partially prevent the exhaust gases from passage through the internal space. 4. The apparatus of claim 1, wherein the lobes are disposed in an annular pattern, the lobes being substantially equal in size and shape and equidistant from each other, the lobes extending radially outward from the center of the distal end in cross section. 5. The apparatus of claim 1, wherein the apparatus is configured for use with a diesel engine, and wherein the proximal end of the apparatus is substantially cylindrical and approximately four to five (4-5) inches in diameter with the distal end being approximately six (6) inches in diameter, the lobes comprising twelve (12) lobes, each approximately four (4) inches in length. 6. The apparatus of claim 1, wherein each lobe is triangle-shaped in cross-section, with the top of the triangle corresponding to the top of the lobe at the distal end of the diffuser, wherein the radially outward side of the triangle is oriented approximately 20 degrees away from a center line perpendicular to the top of the triangle. 7. The apparatus of claim 1, further comprising a plurality of perforations disposed in the lobes. 8. The apparatus of claim 1, wherein the proximal end is substantially cylindrical and adapted for attachment to a substantially cylindrical exhaust pipe. 9. The apparatus of claim 8, wherein each lobe is radially tapered such that at the distal end of the diffuser each lobe is wider at its radial outer side and narrower at its radial inner side, each lobe further extending radially into the cylinder of the pipe and radially outward from the cylinder of the pipe. 10. An apparatus for diffusing exhaust gases, the apparatus comprising: a tailpipe having proximal and distal ends, the proximal end configured to receive exhaust gases and the distal end configured to expel the exhaust gases into the atmosphere; a plurality of lobes disposed at least partially on the distal end, the lobes configured such that at least a portion of the exhaust gases passes through the lobes wherein the lobes are longitudinally tapered, becoming larger as they approach the distal end from the proximal end; and wherein the distal end is approximately equal to the proximal end in cross-sectional area. 11. The apparatus of claim 10, wherein the circumference of the distal end is greater than the circumference of the proximal end. 12. The apparatus of claim 10, wherein the proximal end of the tailpipe is operatively attached to diesel engine for reception of exhaust gases generated by the engine, and further comprising a diesel particulate filter disposed between the engine and the tailpipe. 13. A method of cooling exhaust gases, the method comprising: urging the exhaust gases through a first passage; urging the exhaust gases through a plurality of longitudinally tapered lobes; wherein the exhaust gases pass through the first passage through a first cross-section and through the lobes at a second collective cross-section of approximately equal area as the first cross-section; expelling the exhaust gases from the lobes to the atmosphere. 14. The method of claim 13, further comprising generating the exhaust gases from an internal combustion diesel engine and urging the exhaust gases from the internal combustion diesel engine to the first passage. 15. The method of claim 13, wherein urging the exhaust gases through the lobes comprises urging a portion of the exhaust gases adjacent approximately the entire inner surfaces of the lobes, such that the flow of the exhaust gases is approximately uniform. 16. The method of claim 13, wherein the lobes are created by fluting of a second passage. 17. The method of claim 16, further comprising blocking passage of exhaust gases through a portion of the second passage. 18. A diesel engine exhaust treatment and cooling system, the system comprising: an exhaust pipe substantially containing and directing exhaust gases generated by the engine; an exhaust treatment mechanism disposed on the exhaust pipe, the exhaust treatment mechanism configured to modify the composition of the exhaust gases; a regeneration mechanism operatively attached to the exhaust treatment mechanism, the regeneration mechanism configured to regenerate the exhaust treatment mechanism from time to time; a cooling mechanism disposed on the housing downstream of the exhaust treatment mechanism, the cooling mechanism comprising a plurality of lobes and configured to receive the exhaust gases from the exhaust pipe at a proximal end and expel the exhaust gases through the lobes to the atmosphere at a distal end; wherein the lobes are longitudinally tapered, becoming larger as they approach the distal end from the proximal end; and wherein the cross-sectional area of the distal end is approximately equal to the cross-sectional area of the proximal end. 19. The system of claim 18, wherein the collective circumference of the lobes is greater than the circumference of the exhaust pipe. 20. The system of claim 18, wherein the exhaust treatment mechanism comprises a diesel particulate filter.
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이 특허에 인용된 특허 (14)
Michael J. Marthaler ; Gregory H. Henderson, Air-exhaust mixer assembly.
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