Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1990-01-08
1992-06-09
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Methods
60275, 60297, 60303, 422170, 422174, F01N 302
Patent
active
051196301
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a process for the treatment of soot particles and the cleaning of exhaust gases of an internal combustion engine and an apparatus for its practice.
West German Laid-open Application 3,502,448 discloses an apparatus for the removal of soot particles and other solid particles from the exhaust gas of motor vehicles, which apparatus contains a soot collector that must be freed of soot through a disposal nozzle. This apparatus has the disadvantage that it is not operative if the soot collector has become completely filled with soot. The soot collector must be cleaned out periodically and results in downtimes for the vehicle concerned.
The object of the invention is to provide a process and an apparatus of the type mentioned in the introduction, with which it is possible continuously to remove soot particles from the exhaust gas of an internal combustion engine and to clean the exhaust gas without the necessity of periodically cleaning a filter.
The invention has the advantage over the prior art in that, during operation of the internal combustion engine concerned, its exhaust gases are continuously freed of soot particles, whereby a filter for residual soot particles becomes filled with soot only after long operating periods. The process brings about and the apparatus permits the elimination of the soot particles and thereafter the destructive oxidation of the residual hydrocarbon groups and combustion of the carbon monoxide into carbon dioxide, so that only water vapor, H.sub.2 O, and carbon dioxide, CO.sub.2, are left as exhaust-gas constituents.
Further advantageous modifications of the invention will become apparent from the claims and the ensuing description.
The invention will be explained with reference to practical embodiments in conjunction with the drawings, in which
FIG. 1 is a perspective view of the apparatus in assembled condition;
FIG. 2 is a perspective exploded diagram of the apparatus;
FIG. 3 is a section through the apparatus in assembled condition;
FIG. 4 is a top plan view of a heating ring associated with the apparatus;
FIG. 5 is a view of a stay for a heating wire.
The apparatus contains, first, a casing 1 (FIG. 1), which consists of two casing halves 3, 5 held together by means of flanges 15, 16 and bolts 17. Here, bores with a diameter somewhat larger than that of the bolts are provided in one of the flanges 15. The bolts 17 sit loosely, i.e., with play, in the bores. In the other flange 16, threaded holes are provided into which the bolts 17 are screwed.
Before the two casing halves 3, 5 are brought together, a heating ring 9 (FIG. 2) and a flow cone 6 are inserted in the casing 1.
The first casing half 3 (FIG. 3) has an inlet 2 and the second casing half 5 has an outlet 22 for the exhaust gases. The flow cone 6 of the apparatus is inserted in the casing 1 such that its tip points toward the exhaust gases flowing in through the inlet 2 of the apparatus. Gas deflector plates 7 are provided at one edge 18 (FIG. 2) of the flow cone 6. Exhaust gases arriving in the direction of arrow 20 (FIG. 3) along a streamline 19 pass the inlet 2, the space formed between the flow cone 6 and the wall of the upper casing half 3, and the gas deflector plates 7 (FIG. 3). The gas deflector plates 7 cause the exhaust gases to be swirled in a circular path along the outer wall of the casing 1. The exhaust gases then pass through the electrically heated heating wires 10, 11, (FIGS. 2, 3, 4), clamped in the heating ring 9, at an angle to the gap between the heating wires 10 and the heating wires 11, after which they arrive in a first deflection chamber 4 in the second casing half 5. There, they impinge upon the outer wall of the second casing half 5 and, still swirling in a circular path corresponding to the outer wall of the second casing half 5, are deflected in the first deflection chamber 4. The exhaust gases are also directed toward the outer wall of the second casing half 5, since they are deflected beforehand toward the outer wall of the second casing half 5 by an edge 24 spread
REFERENCES:
patent: 4404795 (1983-09-01), Oishi
patent: 4450682 (1984-05-01), Sato
patent: 4649703 (1987-03-01), Dettling
patent: 4852349 (1989-08-01), Abthoff
Greenberg Laurence A.
Hart Douglas
Lerner Herbert L.
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