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US 5,209,062 AGranted
Large diesel engine
AssigneeSulzer Brothers Limited
InventorJakob Vollenweider
Life of this patent
Estimating the term…
Abstract
A large diesel engine is provided with a manifold arrangement in which a catalytically coated static mixer is disposed within an exhaust manifold. In addition, nozzles are provided in an annular chamber between the static mixer and the exhaust manifold in order to introduce a reducing agent into the flow of exhaust gas prior to entry into the static mixer. Alternatively, the reducing agent can be injected via a nozzle centrally located in a cover at the end of the manifold.
Claims20
A diesel engine comprising
- a plurality of cylinders;
- an exhaust gas manifold connected to said cylinders to receive as flow of exhaust gas from each cylinder;
- a tube concentrically disposed in said manifold to define an annular chamber therebetween in communication with said cylinders;
- a static mixer extending in said tube with a catalyst coating thereon, said static mixer having a plurality of sheets distributed over the cross-section of said tube in the flow direction of the exhaust gas and parallel guide elements on said sheets, adjacent rows of said guide elements being disposed in crossing relation and inclined to said flow direction;
- and
- means in said manifold for supplying a reducing agent into a flow of exhaust gas passing therethrough upstream of said static mixer.
3 more elements
An exhaust manifold arrangement for a diesel engine comprising:
- an exhaust manifold having a plurality of inlets for receiving flows of exhaust gas;
- a tube concentrically within said manifold to define an annular chamber therebetween, said chamber being in communication with said inlets and being closed at one end;
- means for supplying a reducing agent into said chamber for mixing with a flow of exhaust gas therein;
- a static mixer disposed in said tube for receiving and mixing the exhaust gas and reducing agent therein, said static mixer having a plurality of sheets distributed over the corss-section of said tube in the flow direction of the exhaust gas and parallel guide elements on said sheets, adjacent rows of said guide elements being disposed in crossing relation and inclined to said flow direction;
- a cover mounted over one end of said manifold in spaced relation to a second end of said annular chamber and said static mixer to permit a flow of exhaust gas to pass from said chamber into said static mixer;
- and
- a catalyst coating provided on said mixer.
4 more elements
A diesel engine comprising
- a plurality of cylinders;
- an exhaust gas manifold connected to said cylinders to receive a flow of exhaust gas from each cylinder;
- a tube concentrically disposed in said manifold to define an annular chamber therebetween in communication with said cylinders;
- a static mixer extending within said tube with a catalyst coating thereon;
- a guide ring in said manifold at one end thereof, said guide ring being aligned with said annular chamber to guide a flow of exhaust gas therefrom axially into said static mixer within said tube;
- and
- means in said manifold for supplying a reducing agent into a flow of exhaust gas passing therethrough upstream of said static mixer.
4 more elements
Dependencies are inferred from the claim text.