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Method for controlling intake air content local nitrogen enriched combustion and NOx emission

An emission control, nitrogen-enriched technology, applied in combustion methods, combustion equipment, fuel air inlets, etc., can solve problems such as variable density distribution of intake components or stratified local zoning control that is not mentioned.

Inactive Publication Date: 2013-01-16
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these patents and researches are only full-intake nitrogen-rich combustion control, and do not mention the local zoning control of variable density distribution or stratification of intake components, that is, the concept of variable density stratification and distribution of nitrogen components

Method used

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  • Method for controlling intake air content local nitrogen enriched combustion and NOx emission
  • Method for controlling intake air content local nitrogen enriched combustion and NOx emission

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Embodiment Construction

[0017]During the working process of the internal combustion engine, according to the working conditions and operating conditions, through the coordinated control of the auxiliary nitrogen-rich flow injection pressure, timing, injection pulse width, and injection frequency, the variable density distribution and layered internal composition of the intake air components can be realized. Circulation nitrogen-enriched control, that is, the filtered air 2 flowing through the air compressor or supercharger 1 enters the gas separator 3, and the separated nitrogen-enriched gas flows through the check valve 4 and enters the nitrogen-enriched gas storage 5 for storage, wherein, 1. Air compressor or supercharger, 3. Gas separator, check valve 8. Random or non-random equipment can be used. According to the control requirements of the working process, the electric control valve 6 makes the auxiliary nitrogen-enriched air flow pass through the nitrogen-enriched air flow nozzle 7 and inject it...

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Abstract

The invention provides a method for controlling intake air content local nitrogen enriched combustion and NOx emission, which uses nitrogen enriched airflow to perform auxiliary jet in an air intake channel, and organizes the intake airflow to form variable density distribution and layering of oxygen-nitrogen content in a combustion chamber so as to achieve density gradient distribution of the oxygen-nitrogen content in the combustion chamber, form regional combustion control, and create fine combustion control technology. The oxygen-nitrogen content of the intake airflow reforms and weakens the oxygen atmosphere in a fiery combustion region, inhibits combustion, and reduces the NOx emission; in the region close to the edge of the combustion chamber, the concentration of oxygen and nitrogen is not affected by the nitrogen enriched airflow to ensure sufficient combustion in the edge region. The method achieves balanced combustion temperature, inhibits the highest combustion temperature, reduces the NOx emission and improves the combustion heat efficiency by implementing 'peak load shifting' on combustion intensity in the combustion chamber, and solves the problem of worse combustion in a weak combustion region caused by intake of full nitrogen enriched air. The provided nitrogen enriched combustion control is not limited in a working process of an internal combustion engine, sothe method has application significance for extensive combustion equipment.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engines, and in particular relates to the control problem of variable density distribution of intake air components, enrichment of nitrogen, suppression of combustion and control of NOx emission. Background technique [0002] The requirements of internal combustion engine emission regulations have prompted the continuous improvement of its combustion control technology. Through more complete combustion process control, thermal power enhancement and ultra-low fuel consumption and emissions have been achieved. The combustion of an internal combustion engine is mainly controlled by the concentration of oxygen and nitrogen in the intake air. Among them, oxygen supports combustion and nitrogen retards combustion. The distribution of the two components is the basic element of combustion process control. The complex combustion process in the combustion chamber can be controlled to optimize co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M35/10F23L7/00
CPCY02E20/34
Inventor 高青金英爱高淳
Owner JILIN UNIV
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