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Device for exhaust-gas treatment near an engine and motor vehicle having the device

  • US 9,188,039 B2
  • Filed: 01/28/2013
  • Issued: 11/17/2015
  • Est. Priority Date: 07/28/2010
  • Status: Active Grant
First Claim
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1. A device for exhaust-gas treatment near an engine, the device comprising:

  • an exhaust line conducting exhaust gas from the engine in a flow direction;

    a single inflow portion receiving an entire exhaust gas flow from the engine through said exhaust line, an annular structure and a sleeve-shaped guide structure disposed in said exhaust line;

    an inner wall forming an inner flow passage with an inlet region and an outer flow passage in said annular structure;

    said inflow portion causing the exhaust gas to impinge obliquely on said annular structure;

    said guide structure being separate from and extending into said inner flow passage formed by said inner wall;

    said inner wall and said guide structure defining a gap therebetween forming a throttle in said inlet region of said inner flow passage configured to limit a secondary flow of the exhaust gas conducted through said inner flow passage;

    an additive discharger configured to meter a urea-water solution additive into said inner flow passage and to admix the metered additive only to said secondary flow of the exhaust gas;

    a mixing region following said gap in said flow direction and configured to mix the additive with said secondary flow; and

    a hydrolysis catalytic converter disposed in said inner flow passage and following said mixing region in said flow direction.

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