MULTI-CELL STRUCTURE FOR AUTOMOTIVE CATALYST SUPPORT
First Claim
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1. An exhaust system, comprising:
- an exhaust manifold having different length runners; and
an emission control device housing a catalyst brick with a multi-cell density.
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Abstract
An exhaust system is described including an exhaust manifold having different length runners, with an emission control device housing a plurality of catalyst bricks, at least one of which having a multi-cell density. In this way, uneven exhaust mixing may be addressed without modifying packaging of the exhaust system.
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Citations
18 Claims
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1. An exhaust system, comprising:
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an exhaust manifold having different length runners; and an emission control device housing a catalyst brick with a multi-cell density. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An exhaust system, comprising:
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an engine having an integrated exhaust manifold having different length exhaust runners; and an emission control device housing a plurality of catalyst bricks serially positioned, with varying cell density within a catalyst brick. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of operating an engine, comprising:
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flowing exhaust gas from a plurality of engine cylinders to an exhaust manifold having different length runners; combining the exhaust flow downstream of the different length runners and upstream of a close-coupled catalyst housing; and flowing the combined exhaust gas through a plurality of catalyst bricks each with multi-cell density within the close-coupled catalyst housing. - View Dependent Claims (18)
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Specification