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Process for adapting an estimate of a combustion rate of the soot of a thermal engine particulate filter

A heat engine and particle filter technology, applied to engine components, combustion engines, machines/engines, etc., can solve the problems of reduced engine lubrication effect and increased fuel consumption, and achieve the effect of optimized estimation and correct degradation level

Active Publication Date: 2019-02-05
PEZHO SITROEN AUTOMOBILS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reduced lubricating effect of the engine due to introduction of excess fuel into the engine oil and increased fuel consumption during the regeneration phase of the particulate filter

Method used

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  • Process for adapting an estimate of a combustion rate of the soot of a thermal engine particulate filter
  • Process for adapting an estimate of a combustion rate of the soot of a thermal engine particulate filter
  • Process for adapting an estimate of a combustion rate of the soot of a thermal engine particulate filter

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Experimental program
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Embodiment Construction

[0033] figure 1 A method for adjusting the soot burning rate of a particle filter in the exhaust line of a heat engine, in particular a motor vehicle, is shown A diagram of the steps of the estimation method.

[0034] During step 100 of particulate filter regeneration, the engine computer estimates the soot burn rate in step 101 based on a standard estimation model known as the Arrhenius model

[0035] In step 102, the stable oxygen concentration Cons_0 in the exhaust gas is detected by the filter 2 After that, in step 103, by gain burning rate of soot Weighting is performed to modify the standard estimation model. In other words, by gaining The Arrhenius estimation model is weighted to obtain a modified model for calculating the soot burn rate as follows:

[0036]

[0037] in:

[0038] - is the soot combustion rate by oxygen combustion taking into account the excess combustion of soot during the oxygen stabilization phase;

[0039] - is the soot burning r...

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Abstract

The invention mainly relates to a process for adapting an estimate of a combustion rate of the soot (V ( suies / o 2 -N ) of a particulate filter in an exhaust line of a thermal engine, in particular ofa motor vehicle, characterised in that, during a regeneration phase of the particulate filter, said process comprises: a step of estimating a combustion rate of the soot in accordance with a standardestimation model, a step of detecting a stabilisation of an oxygen concentration in exhaust gasses, and a step of modifying the standard estimation model by weighting the combustion rate of the sootby a gain (gain stab O 2 ) following the detection of the stabilisation of the oxygen concentration.

Description

technical field [0001] The invention relates to a method of regulating the estimation of the soot burning rate of a particulate filter of a heat engine. The invention applies particularly advantageously, but not exclusively, to all vehicles equipped with a particulate filter, in particular vehicles of the diesel type. Background technique [0002] Exhaust gases from heat engines often contain pollutants, especially particles that are emitted into the atmosphere. To eliminate these emissions, filters are placed in the exhaust line to trap particles. These particulate filters (FAP) are usually cylinders made of ceramic, consisting of a plurality of channels with a small diameter (approximately ten microns). Particles are trapped in these channels in the form of soot, which causes the filter to gradually become clogged. Therefore, it is necessary to periodically regenerate the filter. [0003] To do this, the filter is heated to burn the trapped particles. Regeneration tec...

Claims

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Application Information

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IPC IPC(8): F01N9/00F01N3/023
CPCF01N3/023F01N9/002F01N2560/025F01N2900/0601F01N2900/1402Y02T10/40
Inventor 伊曼纽尔·莱格勒
Owner PEZHO SITROEN AUTOMOBILS SA
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