Regenerative heater of diesel engine particulate trap and...

F - Mech Eng,Light,Heat,Weapons – 01 – N

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F01N 3/02 (2006.01) B01D 35/18 (2006.01) B01D 46/24 (2006.01) B01D 46/42 (2006.01) F01N 3/027 (2006.01) F01N 3/021 (2006.01)

Patent

CA 2219542

Thin plate-like electric heaters are disposed among multi-layer cylindrical filters for capturing particulates in positions without contacting with the filters. As the means for more reducing the power supply to the heater as the position of the heater is closer to the central cylinder of the multi-layer filters, the thicknesses of the thin plate-like electric heaters or the geometrical patterns of the electric conduction paths are changed to thereby set the resistance values of the heaters in advance in order to reduce the temperature of the central-side cylinder which is apt to be high to thereby realize the balance with the temperature of the-outer-circumferential cylinder, or the electric conduction quantity to the heaters is selectively more reduced as the position of the heater is closer to the central cylinder to realize the balance of temperature distribution with the filter on the outer-circumferential side filter.

Minces éléments chauffants électriques en plaques placés entre des filtres cylindriques multicouches en vue de capter des particules sans toucher aux filtres. Pour réduire davantage l'alimentation électrique de l'élément chauffant à mesure que la position de ce dernier est plus près du cylindre central des filtres multicouches, l'épaisseur des minces éléments chauffants électriques en plaques ou le tracé géométrique des trajet de conduction électrique sont modifiés de manière à obtenir à l'avance les valeurs de résistance des éléments chauffants à l'avance pour diminuer la température du cylindre du côté central qui est susceptible d'être élevée en vue de l'équilibrer avec la température du cylindre de la circonférence extérieure, ou bien la valeur de conduction électrique vers les éléments chauffants électriques est, de manière sélective, davantage réduite à mesure que l'élément chauffant se rapproche du cylindre central afin d'équilibrer la répartition de la température avec le filtre sur le filtre du côté de la circonférence extérieure.

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