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Method and system for thermal control of aftertreatment

A control system and control point technology, applied in electrical control, exhaust treatment, engine control, etc., can solve the problems of not providing, not adapting to changing environmental conditions, etc.

Pending Publication Date: 2021-01-29
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] While the warming assessment of the '545 patent may be useful in some circumstances, it may not provide a method for controlling the operation of the engine to warm the catalyst at a sufficient rate
Furthermore, the '545 patent may not provide a system for adapting to changing environmental conditions

Method used

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  • Method and system for thermal control of aftertreatment
  • Method and system for thermal control of aftertreatment

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Embodiment Construction

[0013] Both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the features that are claimed. As used herein, the terms "comprises", "comprising", "having", "including" or other variations are intended to cover a non-exclusive inclusion such that a range of A process, method, article, or apparatus of elements includes not only these elements, but may also include other elements not explicitly listed or inherent in such a process, method, article, or apparatus. Furthermore, in this disclosure, relative terms (eg, "about," "approximately," and "approximately," etc.) are used to indicate a possible variation of ±10% from the stated values.

[0014] figure 1 Components of the control system 10 for ensuring adequate warming of the one or more catalysts 28 , 32 of the internal combustion engine system 12 are shown. The control system 10 may include a number of inputs 40 associated with the internal...

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Abstract

A method for controlling an internal combustion engine system including a catalyst includes receiving a desired output for an internal combustion engine, and receiving sensor information including information indicative of a temperature of the catalyst. The method includes calculating a plurality of sets of engine performance values based on respective sets of candidate control points, the engineperformance values including a temperature change rate at which the temperature of the catalyst changes over time, and determining whether the temperature change rate satisfies a minimum warmup rate for the catalyst. The method also includes controlling the internal combustion engine based on a selected set of candidate control points and the minimum warmup rate.

Description

technical field [0001] The present invention relates generally to internal combustion engines, and more particularly to methods and systems for controlling an internal combustion engine system having one or more exhaust aftertreatment devices. Background technique [0002] Internal combustion engines are used in various vehicles, mobile machines, and stationary machines to perform work or generate power through the combustion of fuel, such as diesel fuel. Combustion of diesel fuel may produce pollutants such as unburned hydrocarbons, carbon monoxide and nitrogen oxides (NOx). Aftertreatment devices, such as oxidation or selective catalytic reduction (SCR) catalysts, reduce the amount of potentially harmful emissions produced by the internal combustion engine. For example, an oxidation catalyst catalyzes a reaction that converts NOx into NOx, which is a harmless compound. The aftertreatment system may include other aftertreatment devices, such as particulate filters and / or ...

Claims

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Application Information

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IPC IPC(8): F02D41/02F02D41/00F02D41/30
CPCF02D41/024F02D41/0255F02D41/0055F02D41/0002F02D41/30F02D2200/0611F02D2200/0414F02D2200/0406F02D2200/0802F02D2200/101F02D2200/703F01N2900/1602F02D2200/0804F02D41/401F02D41/005F02D41/1406F02D2041/1433F02D2041/1412F01N3/10Y02T10/12F02D41/0235F02D41/0245F02D41/027F01N3/18F02D1/16F01N2900/08F02D2001/167
Inventor S·J·沙博内尔
Owner CATERPILLAR INC
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