Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and apparatus for determining nitrogen oxide-storage capacity of a vehicle catalytic converter

A catalytic converter, nitrogen oxide technology, applied in the direction of exhaust device, muffler device, diagnosis device of exhaust gas treatment device, etc., can solve problems such as increased fuel consumption

Inactive Publication Date: 2021-04-30
DAIMLER AG
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However this leads to an increase in fuel consumption

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and apparatus for determining nitrogen oxide-storage capacity of a vehicle catalytic converter
  • Method and apparatus for determining nitrogen oxide-storage capacity of a vehicle catalytic converter
  • Method and apparatus for determining nitrogen oxide-storage capacity of a vehicle catalytic converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] figure 1 An exhaust system 10 in a vehicle, for example a passenger car or a production vehicle, is shown schematically and partly in section. The exhaust system 10 includes an exhaust system 12 in which a catalytic converter 14 with nitrogen oxide storage capacity is arranged. Catalytic converter 14 may be, for example, an oxidation catalytic converter, in particular a diesel oxidation catalytic converter (DOC). A particle filter 16 and / or an SCR catalytic converter 18 can be connected downstream of the catalytic converter 14 in the exhaust train 12 . In particular, the particle filter 16 can also be designed as an SCR-coated particle filter 16 . To reduce nitrogen oxides in the selective catalytic reduction reaction, nitrogen oxides in the exhaust gas can be converted into water and nitrogen with ammonia in the SCR catalytic converter 18 (SCR=selective catalytic reduction). For this purpose, an aqueous solution of urea, for example, can be supplied to the exhaust g...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for determining the nitrogen oxides-storage capacity of a catalytic converter (14) of a vehicle, wherein the concentration of nitrogen oxides in the exhaust gas downstream of the catalytic converter (14) is measured, wherein at least one first In a step (30), the concentration of nitrogen oxides in the exhaust gas is set, at which concentration the catalytic converter (14) absorbs nitrogen oxides. In at least one second step (36), the concentration of nitrogen oxides in the exhaust gas is set at which desorption of nitrogen oxides by the catalytic converter (14) takes place. In order to determine the nitrogen oxide storage capacity of the catalytic converter ( 14 ), the properties of the catalytic converter ( 14 ) are taken into account at least for the desorption of nitrogen oxides. Furthermore, the invention relates to a device for determining the nitrogen oxide storage capacity of a catalytic converter (14) of a vehicle.

Description

technical field [0001] The invention relates to a method and a device for determining the nitrogen oxide storage capacity of a catalytic converter of a vehicle. In the method, the concentration of nitrogen oxides in the exhaust gas downstream of a catalytic converter is measured. Background technique [0002] It is known from the prior art that in view of the hydrocarbons (HC), carbon monoxide (CO) and nitrogen oxides (NO) in the exhaust of the internal combustion engine of the vehicle x ) reduction determines the performance of the catalytic converter with nitrogen oxide storage capacity by means of specially implemented measures. This includes, for example, an additionally induced heat release, ie heating of the catalytic converter, or a rich jump, ie operating the internal combustion engine with a rich air-fuel mixture. [0003] Furthermore, DE 198 52 240 A1 describes a method for monitoring NO x - a method of storing a catalytic converter in which NO x - Storage of N...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/08F01N3/10
CPCF01N3/0814F01N3/0842F01N3/101F01N2240/18F01N2370/04F01N2550/02F01N2900/1402F01N2900/1614Y02T10/12Y02A50/20F01N3/10
Inventor T·贝克曼
Owner DAIMLER AG