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Exhaust treatment control system for an internal combustion engineRelated Patent Categories: Power Plants, Internal Combustion Engine With Treatment Or Handling Of Exhaust Gas, By Means Producing A Chemical Reaction Of A Component Of The Exhaust Gas, Condition Responsive Control Of Reactor Feed, Pressure, Or By-passExhaust treatment control system for an internal combustion engine description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20050247051, Exhaust treatment control system for an internal combustion engine. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] This application is being filed as a PCT international patent application in the name of Donaldson Company, Inc., a U.S. national corporation (applicant for all designations except the U.S.), and in the names of Wayne M. Wagner, Edward A. Steinbrueck, and Julian A. Imes, all citizens and residents of the U.S. (applicants for the U.S. designation only), on 25 Oct. 2002, designating all countries. FIELD OF THE INVENTION [0002] The present invention relates generally to exhaust treatment systems having cores such as catalytic converters or diesel particulate filters. BACKGROUND OF THE INVENTION [0003] To reduce air pollution, vehicle emissions standards have become increasingly more stringent. With respect to both internal combustion and diesel engines, catalytic converters have been used to reduce the concentration of pollutant gases (e.g., hydrocarbons, carbon monoxide, nitrogen oxides, etc.) in the exhaust stream. Also, with respect to diesel engines, diesel particulate filters have been used to reduce the concentration of particulate matter (e.g., soot) in the exhaust stream. [0004] A typical catalytic converter includes a substrate mounted in an outer casing or "can." The substrate defines a plurality of longitudinal channels that extend through the catalytic converter. Exemplary substrate materials include ceramic (e.g., extruded magnesia alumina silicate) and corrugated metal (e.g., stainless steel). A catalyst is provided on the substrate for promoting the oxidation of a gaseous pollutant. For example, the catalyst can include a precious metal such as platinum, palladium or rhodium, a base metal or a material such as zeolite. In some cases, a material such as zeolite can be included as both a substrate and a catalyst. [0005] A typical diesel particulate filter includes a ceramic substrate mounted in an outer casing. The ceramic substrate is porous and defines a plurality of longitudinal channels. Adjacent longitudinal channels are plugged at opposite ends of the core as described in U.S. Pat. No. 4,851,015 that is hereby incorporated by reference in its entirety. The plugged ends forces exhaust gases to flow through the walls of the substrate so that soot is collected on the walls as the gases pass therethrough. For some applications, a catalyst can be provided on the substrate such that the filter functions like a catalytic converter to reduce the concentration of pollutant gases. SUMMARY OF THE INVENTION [0006] One aspect of the present invention relates to an engine exhaust treatment system including a first exhaust gas path having a diesel particulate filter and a second exhaust gas path having a catalytic converter. The system also includes a valve arrangement for controlling exhaust gas flow between the first and second paths. The system further includes a controller for sensing/monitoring operating conditions of the engine and the condition of the diesel particulate filter. The controller shifts exhaust gas flow between the first and second paths based on the operating condition of the engine and/or the condition of the diesel particulate filter. [0007] A variety of other aspects of the invention are set forth in part in the description that follows, and in part will be apparent from the description, or may be learned by practicing the invention. The aspects of the invention relate to individual features as well as combinations of features. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS [0008] FIG. 1 shows an exhaust treatment system constructed in accordance with the principles of the present invention; [0009] FIG. 2 is a particulate mass reduction efficiency graph corresponding to the system of FIG. 1; [0010] FIG. 3 is a further exhaust treatment system constructed in accordance with the principles of the present invention, the system includes structure for reducing nitrogen oxide emissions; [0011] FIG. 4 is a passive filter regeneration exhaust treatment system constructed in accordance with the principles of the present invention; [0012] FIGS. 5A-5L show example flow logic for controlling the system of FIG. 4; [0013] FIG. 6A shows an exhaust system packing arrangement that is an embodiment of the present invention, the view is a longitudinal cross-section of the system; [0014] FIG. 6B is a cross-sectional view taken along section line 6B-6B of FIG. 6A; [0015] FIG. 6C shows an alternative packing arrangement that is an embodiment of the present invention; [0016] FIG. 7 shows a multi-filter exhaust system that is an embodiment of the present invention; [0017] FIG. 8A shows an exhaust system packing arrangement corresponding to the system of FIG. 7, the view is a longitudinal cross-section of the system; [0018] FIG. 8B is a cross-sectional view taken along section line 8B-8B of FIG. 8A; and [0019] FIG. 8C shows an alternative packing arrangement that is an embodiment of the present invention. [0020] While the invention is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail below. It is to be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the contrary, the invention is intended to cover all modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims. Continue reading about Exhaust treatment control system for an internal combustion engine... Full patent description for Exhaust treatment control system for an internal combustion engine Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Exhaust treatment control system for an internal combustion engine patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Exhaust treatment control system for an internal combustion engine or other areas of interest. ### Previous Patent Application: Temperature swing adsorption and selective catalytic reduction nox removal system Next Patent Application: Exhaust emission control device of internal combuston engine Industry Class: Power plants ### FreshPatents.com Support Thank you for viewing the Exhaust treatment control system for an internal combustion engine patent info. IP-related news and info Results in 0.46773 seconds Other interesting Feshpatents.com categories: Computers: Graphics , I/O , Processors , Dyn. Storage , Static Storage , Printers pbckp |
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