Soot particle mass quantity estimating method for e.g. petrol engine, of motor vehicle, involves calculating mass quantity of soot particles within management unit by calculation software implementing equation system

• Main Authors: ETCHEVERRY CELINE, ROLLET BERNARD
• Format: Patent
• Language: English; French
• Published: 21.08.2009
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

The method involves measuring magnitudes among differential pressure at terminals of a particle filter (13), upstream pressure and downstream pressure of the filter by differential, downstream and upstream pressure sensors (15, 16, 18). A mass quantity of soot particles is calculated within a management unit (20) e.g. on-board computer, by a calculation software implementing an equation system requiring knowledge of the differential pressure and quantity from the upstream and downstream pressures, where the magnitudes are derived directly/quasi-directly using the measurements from the sensors. The magnitudes represent flow discharged in the particle filter. An independent claim is also included for a device for reducing exhaust gas pollution of a motor vehicle. Procédé d'estimation de la quantité massique de particules de suies accumulées dans un filtre à particules (13), caractérisé en ce qu'il comporte les étapes suivantes :- mesure par au moins deux capteurs (15, 16 ; 15, 18 ; 16, 18) de deux grandeurs parmi la pression différentielle (Pdiff) aux bornes du filtre à particules (13), de la pression en amont (Pam) du filtre à particules (13), et de la pression en aval (Pav) du filtre à particules (13) ;- transmission de ces deux grandeurs à une unité de gestion (20) ;- mise en oeuvre d'un calcul de la quantité massique de particules de suies au sein de l'unité de gestion (20) par un logiciel de calcul mettant en oeuvre un système d'équations nécessitant la connaissance de la pression différentielle (Pdiff) et d'au moins une des deux autres grandeurs parmi la pression en amont (Pam) du filtre à particules (13) et la pression en aval (Pav) du filtre à particules (13), ces deux grandeurs de pression (Pdiff, Pam ; Pdiff, Pav) découlant directement ou quasi-directement des deux mesures transmises par les deux capteurs (15, 16 ; 15, 18 ; 16, 18).