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특허 상세정보

Pipe assembly for efficient light-off of catalytic converter

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F01N-007/14   
미국특허분류(USC) 60/299 ; 60/272 ; 29/89008 ; 138/121
출원번호 US-0053612 (1993-04-27)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 18  인용 특허 : 0

An exhaust pipe assembly is provided for achieving a quick light-off of a catalytic converter. Exhaust pipe assembly comprises circuitously bent inner and outer pipes disposed in generally concentric relationship to one another. The inner pipe is formed from a very thin metal to provide a low thermal mass and a correspondingly low heat dissipation therefrom. The outer pipe is thicker to provide structural support, and defines an air insulation barrier around the inner pipe to further reduce heat dissipation. The inner pipe is corrugated at selected locat...


An exhaust pipe assembly comprising: a thin-walled inner pipe having at least one bend and tangents on opposed ends of said bend, said inner pipe being formed to include corrugations through said bend defining a selected outside diameter, said inner pipe further including at least one corrugation on each said tangent in proximity to said bend, said corrugations on said tangents defining outside diameters greater than the outside diameter of said corrugations through said bend; and a thick-walled outer pipe having at least one bend and tangents on opposed...

이 특허를 인용한 특허 피인용횟수: 18

  1. Bonny, Pierre; Huelsberg, Thomas. Air gap insulated exhaust pipe with branch pipe stub and method of manufacturing same. USP2003046539764.
  2. Bonny, Pierre; Huelsberg, Thomas. Air gap insulated exhaust pipe with branch pipe stub and method of manufacturing same. USP2003026519851.
  3. Pierre Bonny DE; Thomas Huelsberg DE. Air gap insulated exhaust pipe with branch pipe stub and method of manufacturing same. USP2002026349468.
  4. Smatloch, Christian; Gross, Walter. Arrangement for treatment of exhausts released from an Otto engine with direct fuel injection. USP2003026519936.
  5. Nakamura, Fumiaki; Takano, Yoshiaki; Kurata, Shun; Suzuki, Takahisa; Ono, Takashi; Naganawa, Hiroki; Ochiai, Kinji; Ohara, Hiroki. Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same. USP2017069669499.
  6. Müller, Frank. Exhaust gas collector. USP2013028375707.
  7. Maeda Fumihiko,JPX ; Chapman Ryan S.. Exhaust manifold pipe weld assembly. USP2000096122911.
  8. Gabriel, Heinrich; Bolte, Albrecht; Humburg, Erhardt; Smatloch, Christian; Kleinschmidt, J?rgen. Exhaust pipe, and method of making an exhaust pipe. USP2005066910506.
  9. Walle, Bernard; Pluschke, Michael. Exhaust-gas conduction component. USP2012108291943.
  10. Maeda Fumihiko,JPX. Extension of exhaust manifold conduit into exhaust pipe. USP2001036199376.
  11. Feldman Rubin. Insulative shield, particularly for automotive exhaust components. USP1999115974784.
  12. Castrén, Risto. Method and apparatus for forming a finned heat exchanger tube that includes an internal fin structure that is a spring formed from a spiral wire wound around a mandrel. USP2012038132326.
  13. Nording, Thomas. Method of manufacturing an air gap insulated exhaust collector manifold by locating manifold components into an outer shell and reducing a cross section of the outer shell to retain the manifold components. USP2012068196302.
  14. Maeda Fumihiko,JPX ; Chapman Ryan S.. Pipe assembly having inner and outer pipes. USP2001046209319.
  15. Nording Thomas,DEX ; Utter Alfred,DEX. Process for manufacturing an air gap-insulated exhaust pipe. USP1998095799395.
  16. Pierre Bonny DE; Thomas Huelsberg DE. Process of manufacturing an air-gap-insulating exhaust elbow of a vehicle exhaust system. USP2002026343417.
  17. Nobileau Philippe,FRX. Subsea flexible pipe. USP1999075927344.
  18. Perrin, Jean-Luc; Jeanson, Arthur; Ruffinoni, Marylene. Turbocharger system subassemblies and associated assembly methods. USP2010097802428.