Exhaust gas treatment regeneration control system and method thereof
A technology for exhaust treatment and regeneration time, which is applied in the direction of exhaust treatment, electric control of exhaust treatment devices, exhaust devices, etc. It can solve the problems of regeneration and regeneration events, particle filter catalyst cracking, etc., and achieve the minimum regeneration time effect
Active Publication Date: 2018-08-24
TENNECO AUTOMOTIVE OPERATING CO INC
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Problems solved by technology
This rapid cooling can crack the particulate filter catalyst and cause additional delays in achieving full filter regeneration as the exhaust particulate filter must again reach the specified regeneration temperature zone
In addition, the electronic control system does not account for partial regeneration events where regeneration is interrupted due to exhaust gas temperatures falling above or below the designated regeneration temperature zone
Method used
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[0015] Referring to the drawings, wherein like numerals designate corresponding parts throughout the several views, there is provided a system 20 for managing regeneration of an exhaust particulate filter 22 . Such as figure 1 As shown, the system 20 generally controls emissions of an internal combustion engine 24 . It should be appreciated that the internal combustion engine 24 may take many different forms, including a compression ignition engine or a spark ignition engine. An exhaust system 26 is generally connected in fluid communication with the internal combustion engine 24 for delivering exhaust gas away from the internal combustion engine 24 . An oxidation catalyst 28 may be placed in fluid communication with exhaust system 26 to provide emissions control by removing pollutants, such as carbon monoxide and nitrogen oxides, from exhaust passing through exhaust system 26 . It should be appreciated that where engine 24 is a compression ignition engine (eg, a diesel engi...
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A system and method for controlling regeneration of an exhaust particulate filter. When regeneration is initiated, the outlet temperature of the exhaust gas oxidation catalyst and the outlet temperature of the exhaust particulate filter are detected. As part of a closed-loop nonlinear temperature targeting scheme, the maximum of the exhaust gas oxidation catalyst outlet temperature and the exhaust particulate filter outlet temperature is set as the reference temperature. The regeneration temperature target is initialized and indexed based on the characteristic time and the reference temperature. As part of a closed loop fuel control scheme, at least one hydrocarbon dosing value is determined based on exhaust mass flow, the reference temperature, and the regeneration temperature target.
Description
technical field [0001] The present disclosure relates to systems and methods for controlling regeneration of an exhaust particulate filter, such as a diesel particulate filter (DPF). More specifically, the present disclosure relates to systems and methods for managing filter regeneration using closed-loop nonlinear temperature targeting and fuel control. Background technique [0002] Exhaust particulate filters have become a common emission control device in most vehicles today, especially in vehicles powered by compression ignition engines. An exhaust particulate filter, commonly referred to as a diesel particulate filter (DPF), is typically installed in fluid communication with a vehicle's exhaust system when used to control emissions from compression-ignition diesel engines. The exhaust particulate filter functions to remove unburned hydrocarbons or soot from the exhaust passing through the exhaust system before it exits the exhaust system and enters the environment. So...
Claims
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IPC IPC(8): F01N3/023F01N3/035F01N9/00F01N3/025
CPCF01N9/002F01N3/0253F01N2610/03F01N2900/0411F01N2900/1602B01J38/04Y02T10/40F01N3/206Y02T10/12
Inventor 约翰·W·德乔治
Owner TENNECO AUTOMOTIVE OPERATING CO INC