Method and computer unit for determining fill level of exhaust gas component in catalytic converter

A technology of filling level and calculation unit, which is applied in the direction of electric control of exhaust treatment device, diagnostic device of exhaust treatment device, exhaust treatment, etc., to achieve the effect of effective combustion process and effective control

Pending Publication Date: 2021-11-26
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This control concept therefore has the disadvantage that it detects the departure of the conversion window very late on the basis of the voltage of the step lambda detector downstream of the three-way catalytic converter.

Method used

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  • Method and computer unit for determining fill level of exhaust gas component in catalytic converter
  • Method and computer unit for determining fill level of exhaust gas component in catalytic converter

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Embodiment Construction

[0025] exist figure 1 In , a device is shown schematically and designated generally by 100 , which is set up to carry out an advantageous embodiment of the method according to the invention and which can be arranged, for example, in a vehicle.

[0026] The device 100 comprises: an internal combustion engine 120, such as a diesel engine or a gasoline engine; a fuel treatment device (Kraftstoffaufbereitungsvorrichtung) 110; an exhaust gas catalytic converter 130, which can be configured, for example, as a three-way catalytic converter; a computing unit 140, such as an engine control unit equipment (ECU); and sensors 145, 147 provided for example in the form of lambda sensors, thermocouples, pressure sensors and / or measuring devices for concentration, temperature, pressure or other physical or chemical variables , the additional physical or chemical variable may describe or influence the state of the exhaust system.

[0027] In particular, the invention makes use of the modeling...

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Abstract

The invention relates to a method and a computer unit for determining fill level of exhaust gas component in a catalytic converter. A method for ascertaining a fill level of at least one exhaust-gas component, which can be stored in a catalytic converter (130) and which is generated in a combustion process, in the catalytic converter (130), wherein a variation of the fill level of the at least one exhaust-gas component in the catalytic converter during the combustion process is determined (230), wherein, during time periods in which the combustion process is not operated, a diffusion-induced change of the fill level of the at least one exhaust-gas component in the catalytic converter (130) is determined, and wherein, on the basis of the determined variation during the combustion process and the diffusion-induced change, a fill level of the at least one exhaust-gas component in the catalytic converter is ascertained (270). The invention furthermore relates to a processing unit (140) and to a computer program for carrying out such a method (200).

Description

technical field [0001] The invention relates to a method for determining the fill level of exhaust gas components in a catalytic converter, and to a computing unit and a computer program for carrying out the method. Background technique [0002] Modern motor vehicles are frequently equipped with catalytic converters for aftertreatment of the exhaust gases of internal combustion engines. In many cases, these catalysts are monitored and / or regulated. [0003] During incomplete combustion of the fuel / air mixture in a gasoline engine, nitrogen (N 2 ), carbon dioxide (CO 2 ) and water (H 2 O), a variety of combustion products are emitted, among which hydrocarbons (HC), carbon monoxide (CO) and nitrogen oxides (NO x ) are legally restricted. According to the current state of the art, the applicable exhaust gas limit values ​​for motor vehicles can only be complied with by means of catalytic exhaust gas aftertreatment. By using, for example, a three-way catalytic converter, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N11/00F01N9/00
CPCF01N11/00F01N11/002F01N11/007F01N9/00F01N2900/1624F01N2900/1602F01N2900/1614F01N3/0814F01N3/0842F01N3/101F01N2550/03F01N2560/025Y02A50/20Y02T10/12Y02T10/40F02D41/1401F01N2550/02
Inventor M·费
Owner ROBERT BOSCH GMBH
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