| 摘要 |
<p>A method of operating a diesel engine is disclosed. The method requires the introduction into combustion chambers of the diesel engine of a diesel fuel, air and a catalyst material which lowers the temperature at which soot will be oxidized. The diesel fuel is burned in the combustion chambers of the diesel engine to form exhaust gases. These exhaust gases contain soot which is a by-product of the burning of the diesel fuel, and also contain the catalyst material in a highly dispersed oxide form. The exhaust gases are passed into a trap structure in which the soot is trapped. The highly dispersed catalyst material is trapped on the soot during any one, any combination, or all of the following: (a) the time the soot is in the combustion chamber, (b) the time the soot is passing from the combustion chambers of the diesel engine to the trap structure, Ic) while the soot is trapped in the trap structure. Periodically, the temperature within the trap structure is raised to a temperature which is sufficient to permit catalytic oxidation of some or all of the soot trapped in the trap structure. This temperature of catalytic oxidation is lower than the temperature at which the soot would oxidize if no catalyst material was present. The catalyst is preferably incorporated in the diesel fuel composition.</p> |
