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US 11,143,069 B2Granted
Method and apparatus to enable package space reduction in a vehicle exhaust system
AssigneeFaurecia Emissions Control Technologies, USA, LLC
InventorsJames Egan, Thorsten Keesser, Dieter Fahrlaender
Life of this patent
Estimating the term…
Abstract
A vehicle exhaust system includes a hot end having one or more hot end exhaust components that treat emissions generated by an engine and a cold end that includes at least one cold end component that attenuates noise. At least one acoustic volume is in parallel or serial to the hot end to further attenuate noise.
Claims28
A vehicle exhaust system comprising:
- a hot end including one or more hot end exhaust components that treat emissions generated by an engine, wherein at least one hot end exhaust component comprises a component housing defining an internal cavity that receives at least one after-treatment substrate;
- a cold end that includes at least one cold end component that attenuates noise;
- and
- a resonator housing at least partially surrounding the component housing and in communication with the internal cavity of the component housing to provide at least one acoustic volume in parallel or serial to the hot end to attenuate noise, and wherein an inner surface of the resonator housing is spaced apart from an outer surface of the component housing by the at least one acoustic volume.
1 more element
A vehicle exhaust system comprising:
- a hot end including one or more hot end exhaust components that treat emissions generated by an engine, wherein at least one hot end exhaust component comprises a component housing defining an internal cavity that receives at least one after-treatment substrate;
- a cold end that includes a cold end pipe having a first pipe end connected to an outlet from the hot end exhaust components and a second pipe end open to atmosphere, and at least one cold end component that attenuates noise, wherein the at least one cold end component comprises at least one of a valve, resonance free pipe, or active noise cancellation that is positioned within the cold end pipe between the first and second pipe ends;
- and
- a resonator housing in communication with the internal cavity of the component housing to provide at least one acoustic volume in the hot end to attenuate noise, wherein the at least one acoustic volume comprises a parallel or serial volume connected to the hot end downstream of the engine, and wherein at least one cold end component is downstream of the resonator housing.
1 more element
A method of providing a reduced package space exhaust system comprising:
- providing a hot end including one or more hot end exhaust components that treat emissions generated by an engine, wherein at least one hot end exhaust component comprises a component housing defining an internal cavity that receives at least one after-treatment substrate;
- providing a cold end that includes a cold end pipe having a first pipe end connected to an outlet from the hot end exhaust components and a second pipe end open to atmosphere, and at least one cold end component that attenuates noise wherein the at least one cold end component comprises at least one of a valve, resonance free pipe, or active noise cancellation;
- providing a resonator housing that at least partially surrounds the component housing and is in communication with the internal cavity of the component housing to provide at least one acoustic volume parallel or serial to the hot end to attenuate noise in combination with the at least one cold end component to eliminate one or more cold end mufflers and/or resonators and reduce an overall length of the cold end;
- and
- positioning the at least one cold end component within the cold end pipe downstream of the resonator housing and between the first and second pipe ends.
2 more elements
Dependencies are inferred from the claim text.