Apparatus and methods for evaluating a soot quantity accumulated in a selective catalytic reduction washcoated particulate filter
A particulate filter, selective technology, applied in mechanical equipment, machines/engines, electronic control of exhaust treatment devices, etc.
Inactive Publication Date: 2018-03-09
GM GLOBAL TECH OPERATIONS LLC
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- Summary
- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
Monitoring soot accumulation in various treatment units remains a challenge
Method used
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[0015] Embodiments of the disclosure are described herein. It should be understood, however, that the disclosed embodiments are merely examples and that other embodiments may take various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention. As will be understood by persons of ordinary skill in the art, various features illustrated and described with reference to any one of the figures may be combined with features illustrated in one or more of the other figures to create embodiments not explicitly illustrated or described. Combinations of features described provide representative embodiments of typical applications. However, various combinations and modif...
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Methods for evaluating a soot quantity accumulated in a selective catalytic reduction wash-coated particulate filter (SCRF) of an exhaust gas treatment system are provided, and include injecting reductant proximate the SCRF, determining one or more mapping values, computing a correction value of a soot quantity using a map correlating the one or more mapping values, detecting an apparent soot burning operating temperature, and correcting an estimated value of the soot quantity using the correction value in order to obtain an evaluated value of the soot quantity. The one or more mapping valuescan include a reductant injection quantity value, a NOx quantity value, a temperature value, and a mass flow value of an exhaust gas. The apparent soot burning operating temperature can comprise a temperature at which a [delta]P across the SCRF improperly implies an actual soot burning. Further provided are apparatuses for performing the disclosed methods.
Description
Background technique [0001] During the combustion cycle of an internal combustion engine (ICE), an air / fuel mixture is provided to cylinders of the ICE. The air / fuel mixture is compressed and / or ignited and combusted to provide output torque. After combustion, the ICE's piston pushes the exhaust gas out of the cylinder through the wastegate opening and into the exhaust system. Exhaust emissions from ICEs (especially diesel engines) are a gas containing, for example, carbon monoxide (CO), unburned x ) and sulfur oxides (SO X ), and heterogeneous mixtures of condensed phase materials (liquids and solids) that make up particulate matter (such as soot). Exhaust gas treatment systems are commonly used to reduce NO in the exhaust stream X emission. Exhaust gas treatment systems may employ one or more components configured to perform aftertreatment processes, such as reducing and / or removing pollutants from the exhaust gas before it is discharged into the environment. [0002] ...
Claims
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IPC IPC(8): F01N11/00F01N3/035
CPCF01N3/035F01N11/00F01N11/002F01N2610/02F01N2900/0412F01N2900/1406F01N2900/1602F01N2900/1614F01N2900/1806F01N3/2066F01N3/208F01N9/002F01N2560/026F01N2560/06F01N2560/08F01N2900/1402F01N2900/1411F01N2900/1606F01N2900/1812Y02T10/12Y02T10/40F01N3/00F01N3/021F01N3/023
Inventor L·N·迪潘纳S·佩雷戈里诺I·里奇
Owner GM GLOBAL TECH OPERATIONS LLC