Pipe assembly for efficient light-off of catalytic converter

Details Pipe assembly for efficient light-off of catalytic converter Pipe assembly for efficient light-off of catalytic converter

1993-04-27

1995-02-21

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60272, 2989008, 138121, F01N 714

Patent

active

053904940

ABSTRACT:
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 locations that will correspond to bends in the circuitous exhaust pipe assembly. The thin-walled locally corrugated inner pipe is then inserted into the outer pipe, and the assembly is bent into the required configuration. The corrugations support the inner and outer pipe relative to one another during the bending process and during use. The bent pipe assembly then is connected to the catalytic converter for subsequent mounting to vehicle engine.

REFERENCES:
patent: 2913009 (1959-11-01), Kuthe
patent: 3028289 (1962-04-01), Roberts et al.
patent: 3133612 (1964-05-01), Sailler
patent: 3404445 (1968-10-01), Crouse
patent: 3730229 (1973-05-01), D'Onofrio
patent: 3847184 (1974-11-01), God
patent: 4022019 (1977-05-01), Garcea
patent: 4117201 (1978-09-01), Keifert
patent: 4261671 (1981-04-01), Langner
patent: 4345430 (1982-08-01), Pallo
patent: 4754781 (1988-07-01), Jan de Putter
patent: 4793384 (1988-12-01), Lalikos
patent: 4819970 (1989-04-01), Umehara
patent: 4854416 (1989-08-01), Lalikos
patent: 4953632 (1990-09-01), Sakaya
patent: 4966202 (1990-10-01), Bryan et al.
patent: 4970351 (1990-11-01), Kirlin
patent: 4984605 (1991-01-01), Schippl
patent: 5069253 (1991-12-01), Hadley
patent: 5163289 (1992-11-01), Bainbridge

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