Device for the dosing of a reducing agent
AssigneeRobert Bosch GmbH
InventorsSven Huber, Hanspeter Mayer, Gerhard Mueller, Michael Offenhuber
Life of this patent
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Abstract
An apparatus for metering a urea or a urea-water solution for delivery to a catalytic converter assembly for removing nitrogen oxides from the exhaust gases of a Diesel engine, includes a housing block supporting function components communicating via a line, formed by recesses in the housing block, for transporting the reducing agent, and the walls of the line are formed by the housing block. This apparatus assures a simple line layout for reducing agent with a minimum number of sealing points that is accordingly appropriate for large-scale mass production.
Claims21
An apparatus for metering a reducing agent, in particular urea or a urea-water solution, comprising a housing block,
- means (4, 7, 11) secured to the housing block for delivering the reducing agent to a catalytic converter assembly for removing nitrogen oxides from the exhaust gases of a Diesel engine,
- said means communicating via a line (12;
- 80, 81, 82, 83), formed by recesses in the housing block (400), for transporting the reducing agent, and
- the walls of the line being formed by the housing block, and
- wherein the means, at least in part, is secured to the housing block and connected to the line with the aid of elastic elements (61, 51) in such a way that the applicable means can execute a compensatory motion if ice forms in the line to increase the volume inside the line to prevent destructive forces on at least one of the housing block and the means.
Dependencies are inferred from the claim text.