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Method for operating an internal combustion engine

An internal combustion engine, operating point technology, applied to internal combustion piston engines, combustion engines, mechanical equipment, etc., can solve problems such as obvious emission peaks, and achieve the effect of improving effectiveness and balancing relative emissions.

Inactive Publication Date: 2012-10-17
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Given the dynamics of torque build-up, existing AGR regulation schemes lead to significant emissions peaks at dynamic load changes

Method used

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  • Method for operating an internal combustion engine
  • Method for operating an internal combustion engine
  • Method for operating an internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0036] In all figures, the same reference signs are used for functionally identical elements and parameters, also for the different exemplary embodiments.

[0037] figure 1 A very simplified schematic diagram of an internal combustion engine 10 with an exhaust system 12 is shown. Internal combustion engine 10 has four cylinders 14 a to 14 d on the left side of the figure, into which fuel can be injected by means of three injection valves 16 a to 16 d. Injection valves 16 a to 16 d are part of injection system 17 of internal combustion engine 10 . The air system 18 includes an air duct 20 and an intake duct 24 , which are arranged adjacent to the internal combustion engine 10 . At the upper right in the drawing, the air system 18 has an actuator 21 for controlling the amount of incoming air. An air mass flow 22 flows through the air channel 20 , which can be measured by an air mass meter 23 arranged upstream of the actuator 21 .

[0038] A catalytic converter 26 (oxidation ...

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PUM

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Abstract

A method for operating an internal combustion engine, in which at least one unwanted exhaust component is reduced, wherein a comparison value of an air ratio is determined and compared with an actual air ratio, and / or a comparison value of an oxygen fraction in an intake pipe is determined and compared with an actual oxygen fraction in the intake pipe, and wherein at least one correction variable is determined in accordance with a result of the comparison for the purpose of correcting at least one variable acting on the actual air ratio and / or the actual oxygen fraction in the intake pipe.

Description

technical field [0001] The invention relates to a method for operating an internal combustion engine according to the preamble of claim 1 , as well as a computer program and a control and / or regulating device according to the dependent claims. Background technique [0002] The ever-increasing limit values ​​for pollutant emissions place higher demands on modern internal combustion engines. In diesel engines this concerns especially soot and NOx emissions (NO X ). It is known from the prior art to use exhaust gas recirculation (AGR), which is an important measure for reducing NOx production. The principle of operation involves reducing the oxygen content in the cylinders and thereby reducing the temperature in the combustion chamber. [0003] In diesel engines there is generally a relative increase in the amount of soot particles with increasing AGR rate. The main reason for this is often the limitation of the oxygen required for carbon black oxidation. Oxygen content re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D43/00F02D21/08
CPCF02D41/144F02M25/0718Y02T10/47F02D41/146F02D2041/1434F02D41/1466F02D41/0052F02M26/15Y02T10/40
Inventor T.波特
Owner ROBERT BOSCH GMBH