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Flattened profile diesel engine exhaust oxidizer
| Details |
Inventors: Kammel, Refaat A.;
Assignee:
Primary Examiner: Hart; Douglas
Assistant Examiner:
Attorney, Agent or Firm: Rhodes; Alex
A flattened profile emission oxidizing device for removing soot and other particulates from the exhaust gases of a diesel engine having an enclosure with a forward inlet for receiving diesel engine exhaust, a main flow path through the enclosure, a bypass through the enclosure for diverting flow from the main flow path, and a control means for selectively controlling the flow through the main flow path and the bypass in accordance with certain sensed conditons relating to the status of engine operation and the condition of a particulate trapping medium that is disposed in the main flow path. The main flow path has an electrostatic precipitator that is disposed in underlying relationship to the particulate trapping medium in the main flow path and a series of vanes are disposed in underlying relationship to the electrostatic precipitator and serve to redirect the exhaust flow passing through the main flow path and distribute the exhaust flow over the electrostatic precipitator and the trapping medium. A thermal stabilizer in the outlet of the device attenuates the peak temperatures of the exhaust gases. |
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DETAILED DESCRIPTION This invention relates to a device for oxidizing certain exhaust emissions from diesel engines, for vehicle or stationary applications.
It is well known that diesel engines emit noxious exhaust by-products which are not only a nuisance to the public, but a health hazard as well.
Therefore, complete public acceptance of diesel engines will not occur until the noxious constituents of their exhausts have been substantially cleaned up.
The U.
S.
E.
P.
A.
has established, by regulations, levels for such emissions which are at present considered tolerable, but insofar as the applicant is aware, no one has been able to design a system which can meet them satisfactorily.
This invention relates to a device containing a filter means for connection to a diesel engine to process the exhaust.
The device collects soot, and certain particulate emissions, and disposes of them during engine operation either (1) by what is herein called "natural regeneration" when the temperature of the filter is high enough, or else (2) by what is herein called "forced regeneration" when the filter, due to insufficiently high temperatures, becomes loaded with particulates to the pointwhere it either may not function properly or else otherwise interfere with the vehicle's operation.
The latter type of regeneration is initiated by an associated electronic control unit which receives signals from various sensing devices associated with the engine and/or with the collecting and oxidizing device itself.
In both types of regeneration processes, soot which has been accumulated in the device is burned out and the by-product, carbon dioxide mainly, is disposed of into the atmosphere.
The device may be endowed with particular catalyst formulation which also oxidizes hydrocarbons and carbon monoxide thereby substantially reducing, if not essentially entirely eliminating, diesel odor.
The invention comprises a number of features which individually and collectively contribute to its ability to clean up diesel engine exhaust
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Manufacturing Materials 
