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US 8,769,940 B2Granted
Marine exhaust catalyst
AssigneeCummins Power Generation IP, Inc.
InventorsMark E. Turpin, Clayton Smith, Gary A. Salmonson, Brian G. Haupt, Shawn John Kipka, Kurt Butz, Lee Severtson
Life of this patent
Estimating the term…
Abstract
An internal combustion engine is coupled to an electric power generator. An exhaust manifold for the engine includes an exhaust gas conduit. A housing includes a catalyst in fluid communication with the conduit to receive exhaust produced by the engine. The catalyst is operable to reduce one or more constituents of the exhaust.
Claims24
An apparatus, comprising:
- a marine genset including an internal combustion engine and an electric power generator mechanically driven by the engine;
- an exhaust manifold for the engine including an exhaust gas conduit;
- and
- an exhaust emission aftertreatment device including an exhaust passage in fluid communication with the exhaust gas conduit to receive exhaust therefrom, the exhaust emission aftertreatment device including a catalyst in the exhaust passage to reduce one or more exhaust constituents and thermal insulation fixed about the catalyst to reduce an outer temperature of the exhaust emission aftertreatment device while maintaining a desired temperature of the catalyst during operation of the engine, the exhaust emission aftertreatment device being structured without a liquid coolant passageway to reduce temperature thereof.
1 more element
A method, comprising:
- operating an internal combustion engine of a marine genset at engine speed;
- driving an electrical power generator of the marine genset with the engine;
- passing exhaust from the engine through an exhaust gas conduit of an exhaust manifold;
- passing the exhaust from the exhaust gas conduit through an exhaust passage of an exhaust emission aftertreatment device, the exhaust emission aftertreatment device including a catalyst in the exhaust passage;
- using the catalyst to reduce one or more constituents of the exhaust received from the engine;
- and
- controlling a temperature of the catalyst with thermal insulation fixed about the catalyst, and reducing an outer temperature of the exhaust emission aftertreatment device, without using a liquid coolant, during operation of the internal combustion engine.
4 more elements
An apparatus, comprising:
- an internal combustion engine configured to generate means for generating mechanical power including an internal combustion engine at a speed;
- means for driving a an electrical power generator connected with the engine configured to convert the mechanical power to electrical power;
- an exhaust gas system connected to the engine to receive means for reducing a constituent of an exhaust from the engine, the exhaust gas system including an elongated tube defining an exhaust passage with a catalyst configured to reduce a constituent in the exhaust and a housing extending around the elongated tube;
- and
- means for controlling temperature of the catalyst with insulation fixed about the catalyst between the tube and the housing that is configured to control a temperature of the catalyst without using a liquid coolant.
2 more elements
An apparatus, comprising:
- a marine genset including an internal combustion engine and an electric power generator mechanically driven by the engine;
- an exhaust manifold for the engine including an exhaust gas conduit;
- an exhaust emission aftertreatment device extending from an inlet port at the exhaust manifold to an outlet port, the exhaust emission aftertreatment device including a catalyst spaced from the inlet and outlet ports in fluid communication with the exhaust
- conduit to receive exhaust therefrom, the exhaust emission aftertreatment device having thermal insulation extending from the inlet port to the outlet port that is fixed
- about the catalyst to reduce an outer temperature of the exhaust emission aftertreatment device while maintaining a desired temperature of the catalyst during operation of the engine;
- and
- an exhaust cooler to cool the exhaust located downstream of the catalyst.
4 more elements
Dependencies are inferred from the claim text.