| 摘要 |
<p>A method for determining a temperature set point value Tset for use in controlling the regeneration of a particulate filter for an internal combustion engine comprises determining a critical temperature value Tc for the filter above which would risk heat damage, determining a temperature adjustment value Ta for the filter reflecting its thermal inertia during regeneration, and determining the temperature set point value Tset as a function of the Tc and Ta values. Tc may be determined as a function of the filter, filter geometry and materials properties, soot accumulation of the filter, exhaust space velocity through a particulate canister, exhaust gas oxygen concentration, exhaust gas heat capacity, exhaust gas mass flow, and thermal resistance of the filter. Methods of controlling exhaust gas temperatures may include operating a radiator fan, controlling a number of unfueled engine cylinders, or using a doser to inject fuel into the exhaust gases.</p> |
