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Method For Operating Oxygen Sensor Arrangement In Exhaust Gas System Of Internal Combustion Engine

An exhaust gas system and detector technology, applied in the electronic control of exhaust treatment devices, diagnostic devices of exhaust treatment devices, exhaust devices, etc., can solve problems such as target conflicts

Active Publication Date: 2014-08-06
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

such a diagnosis must be confirmed in a test cycle in which an objective conflict arises in the program control of the diagnosis

Method used

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  • Method For Operating Oxygen Sensor Arrangement In Exhaust Gas System Of Internal Combustion Engine
  • Method For Operating Oxygen Sensor Arrangement In Exhaust Gas System Of Internal Combustion Engine

Examples

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Embodiment Construction

[0022] The illustrations shown in the drawings illustrate per se known sensor arrangements in the exhaust gas system of an internal combustion engine according to a 2-detector concept. Such a sensor arrangement is suitable for carrying out the method according to the invention, in which a diagnosis and adaptation of an air mass sensor arranged upstream of the catalytic converter with regard to deviations in its characteristic curve is possible in a particularly advantageous manner.

[0023] A first catalytic converter volume 12 and a second catalytic converter volume 13 are provided in the exhaust gas system 11 of the internal combustion engine 10 , which are provided for reducing the exhaust gas emissions contained in the exhaust gas. A mixture of fuel and air is provided to internal combustion engine 10 for combustion. The supplied air quantity is detected by the air quantity measuring device 14 . The measurement data are forwarded to the electronic control unit 15 . The c...

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Abstract

The method involves detecting the values for the diagnosis of active oxygen adjustment, where the former value represents the oxygen storage capacity of a catalyst (12), and the latter value represents the oxygen discharge capacity of the catalyst. A characteristic offset of an oxygen sensor (18) is calculated from the ratio of oxygen storage capacity to oxygen discharge capacity. An adaption of the characteristic offset takes place with a natural frequency control of the catalyst. Independent claims are included for the following: (1) a computer program for executing a method for operating an oxygen sensor arrangement; and (2) a computer program product for executing a method for operating an oxygen sensor arrangement.

Description

technical field [0001] The invention relates to a method for operating an air intake sensor arrangement in an exhaust system of an internal combustion engine, said air intake sensor arrangement having at least one first air intake sensor upstream of a catalytic converter and at least one air intake sensor upstream of the catalytic converter Downstream second air intake sensor. Among other things, the invention relates to a computer program and a computer program product with program code for carrying out the method. Background technique [0002] In modern internal combustion engines, air intake sensors are used which determine the oxygen concentration in the exhaust gas of the internal combustion engine. One or more catalytic converters for exhaust gas aftertreatment are arranged in the exhaust gas tract of the internal combustion engine. The air and fuel supply to the internal combustion engine is regulated via the lambda control loop in such a way that an optimum composi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N11/00
CPCF01N11/007F01N2550/00F01N2560/025F01N2560/14F01N2900/1624F02D41/0295F02D41/1441F02D41/1454F02D41/1456F02D41/1495F02D41/2454F02D41/2474F02D2200/0814F02D2200/0816Y02T10/40
Inventor 褚思芸M·金泽勒
Owner ROBERT BOSCH GMBH