Device for generating a reducing agent/air mixture
First Claim
1. An apparatus for generating a mixture of reducing agent and air, comprisinga feed pump (16) by which reducing agent is pumped and which has a pump housing (22, 32), anda mixing chamber (50), in which reducing agent and air pumped by the feed pump (16) can be introduced, the mixing chamber (50) being embodied in a mixing chamber body (36),the mixing chamber body (36) communicating with the pump housing (22, 32) of the feed pump (16),wherein the mixing chamber (50) is embodied in a bore (52) of the mixing chamber body (36);
- wherein an elastically compressible sleeve (54) is pressed into the bore (52); and
wherein an air inlet (56) discharges into the bore (52) at the circumference of the sleeve (54), the sleeve (54) being elastically compressible by the air, supplied under pressure, so that air can reach the mixing chamber (50) through an annular gap (55) forming between the bore (52) and the sleeve (54).
1 Assignment
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Accused Products
Abstract
The apparatus for generating a mixture of reducing agent and air has a pumping agent feed pump having a pump housing and a mixing chamber into which reducing agent and air pumped by the feed pump can be introduced; the mixing chamber is embodied in a mixing chamber body which communicates directly with the pump housing of the feed pump and forms a cap of the pump housing. The feed pump has a drive shaft which protrudes into the pump housing, and the mixing chamber body is disposed at least approximately radially to the drive shaft The apparatus has a compact structural size and only a slight reducing agent-filled idle volume.
4 Citations
15 Claims
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1. An apparatus for generating a mixture of reducing agent and air, comprising
a feed pump (16) by which reducing agent is pumped and which has a pump housing (22, 32), and a mixing chamber (50), in which reducing agent and air pumped by the feed pump (16) can be introduced, the mixing chamber (50) being embodied in a mixing chamber body (36), the mixing chamber body (36) communicating with the pump housing (22, 32) of the feed pump (16), wherein the mixing chamber (50) is embodied in a bore (52) of the mixing chamber body (36); - wherein an elastically compressible sleeve (54) is pressed into the bore (52); and
wherein an air inlet (56) discharges into the bore (52) at the circumference of the sleeve (54), the sleeve (54) being elastically compressible by the air, supplied under pressure, so that air can reach the mixing chamber (50) through an annular gap (55) forming between the bore (52) and the sleeve (54). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- wherein an elastically compressible sleeve (54) is pressed into the bore (52); and
Specification