Operation of diesel/lean-burn engines having easily regenerated particle filters in the exhaust systems therefor
OwnerVirginie Harle, Laurent Rocherinventors
Life of this patent
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Abstract
Diesel or lean-burn engines which are fitted with an exhaust system provided with a particle filter are supplied with a fuel containing an additive capable of lowering the temperature at which the soot particles trapped by the particle filter can be burned and which essentially consists of an iron compound or essentially consists of an iron compound and of a cerium compound, and wherein the particle filter through which the exhaust gases produced by the combustion of the fuel in the engine pass is a catalytic filter in which the catalyst assists with the combustion of the soot particles; this improves soot combustion dynamics, particularly at low temperatures.
Claims11
-10. (canceled)
In the operation of a diesel engine or a lean-burn engine equipped with an exhaust system in which a particle filter is mounted, the improvement which comprises supplying the engine with a fuel containing an additive that lowers the combustion temperature of the particles of soot retained by the particle filter and consisting essentially of an iron compound or essentially of an iron compound and of a cerium compound, and that the particle filter through which the exhaust gases produced by the combustion of the fuel in the engine are passed, is a catalytic filter, the catalyst of which assists with the combustion of the particles of soot.
Dependencies are inferred from the claim text.