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Method and control device for adjusting the filling level of a catalytic converter

A fill level, catalytic converter technology used in electrical controls, exhaust, mufflers, etc. to reduce emissions and improve accuracy

Active Publication Date: 2022-01-18
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Current control designs have the disadvantage that they detect the opening of the catalytic converter window only later on the basis of the voltage of the jumping lambda sensor downstream of the catalytic converter
Since this fill level cannot be measured, it can only be modeled and accounted for

Method used

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  • Method and control device for adjusting the filling level of a catalytic converter
  • Method and control device for adjusting the filling level of a catalytic converter
  • Method and control device for adjusting the filling level of a catalytic converter

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Embodiment Construction

[0025] figure 1 A technical environment in which the method according to the invention can be applied is schematically shown. An internal combustion engine 10 embodied as a gasoline engine is supplied with combustion air via an air supply 11 . In this case, the air mass of the combustion air can be determined by means of an air mass meter 12 in the air supply 11 . The supplied air mass is used to determine the fuel quantity to be metered with the air quantity λ to be precontrolled. The exhaust gas of internal combustion engine 10 is conducted via an exhaust gas duct 15 in which an exhaust gas aftertreatment device with a catalytic converter is arranged. The catalytic converter here corresponds to the three-way catalytic converter 16 which, as is known, converts the three exhaust gas components NO in three reaction paths x, HC and CO and has the effect of storing oxygen. Furthermore, a first lambda sensor 14 , which can be embodied as a broadband or jump sensor, is arranged...

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Abstract

The invention relates to a method and a control device for regulating the filling level of a catalytic converter (16) arranged in an exhaust gas aftertreatment device of an exhaust gas tract (15) downstream of an internal combustion engine (10), the catalytic converter (16) The fill level of the exhaust gas component accumulator is modeled as an input variable with respect to the exhaust gas component with the participation of signals related to the concentration of the exhaust gas component, wherein an exhaust gas sensor ( 14 ) arranged upstream of the catalytic converter ( 16 ) is used The concentration is measured and a corresponding concentration-dependent signal of the exhaust gas sensor is supplied to a model for modeling the fill level. Improved accuracy for adjusting the fill level of the catalytic converter is achieved by checking the signal output by the exhaust gas sensor for dynamic distortions before further processing in the model, and in the presence of the In case of dynamic distortion, said dynamic distortion is corrected in signal processing (29).

Description

technical field [0001] The invention relates to a method for adjusting the fill level of a catalytic converter arranged in an exhaust gas aftertreatment device in an exhaust tract downstream of an internal combustion engine, in which method the fill level of an exhaust gas component accumulator of the catalytic converter is adjusted The exhaust gas components are modeled as input variables with the participation of signals related to the concentration of the exhaust gas components, wherein the concentration is measured with an exhaust gas sensor arranged upstream of the catalytic converter and the corresponding The signal related to the concentration is supplied to a model for modeling the filling level. Furthermore, the invention relates to a control device which is designed to carry out the method. Background technique [0002] During incomplete combustion of the air-fuel mixture in a gasoline engine, in addition to nitrogen (N 2 ), carbon dioxide (CO 2 ) and water (H ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/14F01N9/00
CPCF01N9/00F01N9/005F01N2430/06F01N2900/1624F02D41/0295F02D41/1401F02D41/1441F02D41/1454F02D2041/1433F02D2200/0814F02D2200/0816F01N3/101F01N11/007Y02T10/12Y02T10/40F01N3/20F01N2560/025F01N2900/1402F01N2900/0416F01N2900/1814F02B77/086
Inventor M.费
Owner ROBERT BOSCH GMBH