Reactant release arrangement
First Claim
1. A reactant release arrangement for releasing reactant into the exhaust gas stream of an internal combustion engine, the reactant release arrangement comprising:
- an exhaust gas guide element providing an exhaust gas flow duct and having a direction of longitudinal extension corresponding to a main exhaust gas flow direction of exhaust gas flowing in the exhaust gas flow duct;
a reactant release body carried extending into the exhaust gas flow duct along a longitudinal axis of the reactant release body at the exhaust guide element, the reactant release body comprising a body wall, wherein a reactant-receiving volume is surrounded by a wall inner surface of the body wall and is provided in the reactant release body and exhaust gas flowing in the exhaust gas flow duct flows around the reactant release body at a wall outer surface of the body wall and the reactant-receiving volume is open to the exhaust gas flow duct via at least one passage opening;
a reactant release unit for releasing reactant into the reactant-releasing volume; and
a heating device for heating the reactant release body, the heating device being associated with the body wall at least in an area of the wall inner surface of the body wall, wherein the body wall comprises an inner wall at least partly providing the wall inner surface and an outer wall at least partly providing the wall outer surface, and the heating device is arranged between the inner wall and the outer wall.
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Accused Products
Abstract
A reactant release arrangement for an exhaust gas stream of an internal combustion engine has an exhaust gas guide element (12) with an exhaust gas flow duct (13). A reactant release body (14) extends into the exhaust gas flow duct (13) and has a reactant-receiving volume (20) with a wall inner surface (32) and a wall outer surface (18) of a body wall (16) that is open to the exhaust gas flow duct (13) via at least one passage opening (44, 46). Exhaust gas (G) flowing in the exhaust gas flow duct (13) flows around the reactant release body (14) at a wall outer surface (18) of the body wall (16). A reactant release unit (22) releases reagent (M) into the reactant-receiving volume (20). A heating device (38) is associated with an area of the inner surface (32) of the body wall (16) and heats the reactant release body (14).
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Citations
25 Claims
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1. A reactant release arrangement for releasing reactant into the exhaust gas stream of an internal combustion engine, the reactant release arrangement comprising:
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an exhaust gas guide element providing an exhaust gas flow duct and having a direction of longitudinal extension corresponding to a main exhaust gas flow direction of exhaust gas flowing in the exhaust gas flow duct; a reactant release body carried extending into the exhaust gas flow duct along a longitudinal axis of the reactant release body at the exhaust guide element, the reactant release body comprising a body wall, wherein a reactant-receiving volume is surrounded by a wall inner surface of the body wall and is provided in the reactant release body and exhaust gas flowing in the exhaust gas flow duct flows around the reactant release body at a wall outer surface of the body wall and the reactant-receiving volume is open to the exhaust gas flow duct via at least one passage opening; a reactant release unit for releasing reactant into the reactant-releasing volume; and a heating device for heating the reactant release body, the heating device being associated with the body wall at least in an area of the wall inner surface of the body wall, wherein the body wall comprises an inner wall at least partly providing the wall inner surface and an outer wall at least partly providing the wall outer surface, and the heating device is arranged between the inner wall and the outer wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 20, 21, 22)
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15. An exhaust system for an internal combustion engine, the exhaust system comprising a reactant release arrangement, the reactant release arrangement comprising:
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an exhaust gas guide element providing an exhaust gas flow duct configured for exhaust gas to flow within the exhaust gas flow duct in a main exhaust gas flow direction; a reactant release body carried extending into the exhaust gas flow duct along a longitudinal axis of the reactant release body at the exhaust guide element, the reactant release body comprising a body wall, wherein a reactant-receiving volume is surrounded by a wall inner surface of the body wall and is provided in the reactant release body and exhaust gas flowing in the exhaust gas flow duct flows around the reactant release body at a wall outer surface of the body wall, the reactant-receiving volume is open to the exhaust gas flow duct via at least one passage opening and the body wall comprises an inner wall at least partly providing the wall inner surface and an outer wall at least partly providing the wall outer surface; a reactant release unit for releasing reactant into the reactant-releasing volume; and a heating device for heating the reactant release body, the heating device being associated with the body wall at least in an area of the wall inner surface of the body wall, wherein the heating device is arranged between the inner wall and the outer wall. - View Dependent Claims (16, 17, 18, 19, 23)
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24. A reactant release arrangement for releasing reactant into the exhaust gas stream of an internal combustion engine, the reactant release arrangement comprising:
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an exhaust gas guide element providing an exhaust gas flow duct and having a direction of longitudinal extension corresponding to a main exhaust gas flow direction of exhaust gas flowing in the exhaust gas flow duct; a reactant release body carried extending into the exhaust gas flow duct along a longitudinal axis of the reactant release body at the exhaust guide element, the reactant release body comprising a body wall, wherein a reactant-receiving volume is surrounded by a wall inner surface of the body wall and is provided in the reactant release body and exhaust gas flowing in the exhaust gas flow duct flows around the reactant release body at a wall outer surface of the body wall and the reactant-receiving volume is open to the exhaust gas flow duct via at least one passage opening; a reactant release unit for releasing reactant into the reactant-releasing volume; a heating device for heating the reactant release body, the heating device being associated with the body wall at least in an area of the wall inner surface of the body wall; and a reactant deflection element provided in the reactant-receiving volume, wherein the reactant deflection element is configured conically expanding in a direction away from the reactant release unit.
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25. An exhaust system for an internal combustion engine, the exhaust system comprising a reactant release arrangement, the reactant release arrangement comprising:
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an exhaust gas guide element providing an exhaust gas flow duct configured for exhaust gas to flow within the exhaust gas flow duct in a main exhaust gas flow direction; a reactant release body carried extending into the exhaust gas flow duct along a longitudinal axis of the reactant release body at the exhaust guide element, the reactant release body comprising a body wall, wherein a reactant-receiving volume is surrounded by a wall inner surface of the body wall and is provided in the reactant release body and exhaust gas flowing in the exhaust gas flow duct flows around the reactant release body at a wall outer surface of the body wall and the reactant-receiving volume is open to the exhaust gas flow duct via at least one passage opening; a reactant release unit for releasing reactant into the reactant-releasing volume; a heating device for heating the reactant release body, the heating device being associated with the body wall at least in an area of the wall inner surface of the body wall; and a reactant deflection element provided in the reactant-receiving volume, wherein the reactant deflection element is configured conically expanding in a direction away from the reactant release unit.
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Specification