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US 12,535,027 B2Granted
Vehicle exhaust system having an integral hood
AssigneeTenneco Automotive Operating Company Inc.
InventorsStephen Thomas, Gabriel Ostromecki, Asela Anuruddhika Benthara-Wadumesthrige, Frederick M. Baumgartner, David Alan Stephens, Marcel Womann
Life of this patent
Estimating the term…
Abstract
A vehicle exhaust system having a first pipe, a second pipe, and an integral hood. The first pipe extending between a first end and a second end. The second pipe extending between a third end and a fourth end. At least a portion of the first pipe being positioned within the second pipe such that the second end is provided downstream of the third end. The integral hood is formed between the second end and the third end.
Claims19
A vehicle exhaust system comprising:
- a first pipe having a first wall defining a first fluid passage, the first pipe extending between a first end and a second end along a first centerline, the first pipe having a first cross-sectional area;
- a second pipe having a second wall defining a second fluid passage, the second pipe extending between a third end and a fourth end along a second centerline, and the second pipe having:
- a second cross-sectional area with a first area at the third end and a second area, smaller than the first area, downstream the first area;
- and
- a first step defining a transition between the first area and the second area;
- and
- an integral hood formed between the second end and the third end, the integral hood defined by at least one radial space between the first pipe and the second pipe, with respect to the second centerline;
- wherein at least a portion of the first pipe is positioned within the second pipe such that the third end is provided axially forward of the second end, with respect to the first centerline, and the second end confronts and is spaced from a respective portion of the first step to define a gap therebetween that is fluidly coupled to the integral hood;
- and
- wherein the gap defines an opening to the integral hood, and the gap and the integral hood, together, define a secondary emissions passage in which an emissions flows into and out of during operation of the vehicle exhaust system.
7 more elements
A vehicle exhaust system comprising:
- a first pipe having a first wall defining a first fluid passage, the first pipe extending between a first end and a second end along a first centerline, the first pipe having a first cross-sectional area;
- a second pipe having a second wall defining a second fluid passage, the second pipe extending between a third end and a fourth end along a second centerline, and the second pipe having:
- a second cross-sectional area with a first area at the third end and a second area, smaller than the first area, downstream the first area;
- and
- a first step defining a transition between the first area and the second area;
- and
- an integral hood formed between the second end and the third end, the integral hood defined by at least one radial space between the first pipe and the second pipe, with respect to the second centerline;
- wherein at least a portion of the first pipe is positioned within the second pipe such that the third end is provided axially forward of the second end, with respect to the first centerline, and the second end confronts and is spaced from a respective portion of the first step to define a gap therebetween that is fluidly coupled to the integral hood;
- wherein the first cross-sectional area includes a second step defining a transition between a first area upstream of the second step and a second area, smaller than the first area, downstream the second step;
- and
- wherein the second step terminates at the second end.
8 more elements
A vehicle exhaust system comprising:
- a first pipe having a first wall defining a first fluid passage, the first pipe extending between a first end and a second end along a first centerline, the first pipe having a first cross-sectional area;
- a second pipe having a second wall defining a second fluid passage, the second pipe extending between a third end and a fourth end along a second centerline, and the second pipe having:
- a second cross-sectional area with a first area at the third end and a second area, smaller than the first area, downstream the first area;
- and
- a first step defining a transition between the first area and the second area;
- and
- an integral hood formed between the second end and the third end, the integral hood defined by at least one radial space between the first pipe and the second pipe, with respect to the second centerline, with an inlet to the integral hood being formed along a portion of the first pipe confronting the integral hood, the inlet and the integral hood defining a secondary emissions passage of the vehicle exhaust system, the integral hood at the inlet extends circumferentially about less than an entire circumference of the second centerline at the inlet;
- wherein at least a portion of the first pipe is positioned within the second pipe such that the third end is provided axially forward of the second end, with respect to the first centerline, and the second end is spaced axially aft of an apex of the first step.
5 more elements
Dependencies are inferred from the claim text.